P0171 jeep

x2 2003 Jeep Grand Cherokee 4.0 Liter Engine with a P1281 Code. This automotive repair article is on a specific check engine light code for a Jeep Grand Cherokee. When scanned with an automotive scan tool, a P1281 fault code was retrieved. The code has to do with the engine not reaching operating temperature within a certain length of time after ...Many owners have reported p2096 for the following makes: Subaru, BMW, Nissan, Hyundai, and Jeep. Code P2096 symptoms include rough idle, bad fuel economy, poor acceleration, and engine misfire. ... P0171 Code: System Too Lean (Bank 1) P2097 Code: Post Catalyst Fuel Trim System Too Rich Bank 1.P0171 is a diagnostic trouble code (DTC) for "System Too Lean (Bank 1)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Feb 18, 2021 · If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persists the front oxygen (O2) sensor may need to be replaced. 1997 JEEP TJ. 6 CYL. 4WD. MANUAL. 90,000 MILES. I recently started getting very poor gas mileage. Less than 10 mile per gallon. I get a P0171 code when I hook up a code reader. Where should I look for a the problem.Search results for "p0171" ... P0171 JEEP 79,591 Views. Fuel System 1/1 Lean . P0171 KIA 71,816 Views. Bank 1 System Too Lean. P0171 LAND-ROVER 40,794 Views. System Too Lean Bank 1. P0171 LEXUS 91,279 Views. Air/Fuel Mixture System Lean Bank 1. P0171 LINCOLN 17,820 Views.4. This article will help you to diagnose diagnostic trouble code P0171 (System Too Lean Bank 1) and/or P0174 (System Too Lean Bank 2) on your Ford, Mercury or Lincoln 4.6L or 5.4L equipped car, pick up, van or SUV. Although you can apply this info to any Ford vehicle with a V6 or V8, this info concentrates on the Ford 4.6L and 5.4L V8 engines.P0171 and P0174 codes may be caused by a vacuum leak in the foul air tube, intake manifold, or purge valve, according to General Motors. Purge Valve Test. 1.. P0171, according to the manual, is a "Fuel System Lean" diagnostic trouble code. In other words, the engine computer, through the O2 sensor and MAF sensor (mass air flow) adjust your fuel ... RE: P0171 will not leave IP: Logged Message: 2001 Jeep Grand Cherokee 4.7L V8 134K miles P0171. Just replaced Plugs, PCV and Fuel Filter. Left bank plugs 1.3.5.7 were severly carboned but dry. P0171 came back plus new P0300, P0301, P0303, P0305. Still idles rough in Drive. Next day only P0171 and runs smoother but still not right. 8 pre-10 post ... 3,301 Posts. #4 · Oct 9, 2012. P0171 means bank 1 is lean and is near the limits of what the PCM can adapt to. This code and its sister, P0174 (Bank 2) are common sights on mass air metered cars, and on them, its usually easy to pin down. On the 3.7L however, it uses speed density metering for fuel calculations.What Does Code P0171 Mean for Your Jeep? P0171 definition: Bank 1 has too much air or not enough fuel Issue Severity: MODERATE- Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid damage to spark plugs, pistons, and catalytic converters.Discussion Starter · #1 · Feb 3, 2013. Hey everybody, I have a 2000 Silverado 5.3 with the codes P0171, P0174, P0420. I am completely stumped right now. My mechanic replaced the intake manifold gasket, which was blown, as well as the MAF. I know P0420 is catalytic converter but here's the thing. The truck, after having all that replaced still ...P0171 is triggered by the engine bank 1 "upstream" oxygen sensor and P0174 is triggered by the engine bank 2 "upstream" oxygen sensor. The oxygen sensor alerts your system when the condition is too lean meaning there's too much oxygen in the exhaust. The symptoms and causes will help you determine the exact issue and how to fix it.Oct 01, 2018 · The P0171 code on a Jeep Wrangler will often be thrown if the fuel injection system is not operating properly. Typically the code will be triggered by a lean condition in the engine. There aren’t usually any drivability issues associated with P0171. |P2173 JEEP code description. The Diagnostic Trouble Code (DTC) will set when the Powertrain Control Module detects that a large vacuum leak is present or that the signal voltage for both Throttle Position (TP) Sensors is stuck a 2.5 volts and calculated Manifold Absolute Pressure is less than the Gas Flow Adaptation value.One trip fault will set within 5 seconds.Jun 20, 2015 · 8,310 Posts. #2 · Jun 21, 2015 (Edited) P0171 is indeed the code for a too lean bank 1. It means that for some reason too much oxygen is measured at the 1-1 oxygen sensor. Since the upstream O2 sensor is used for the fuel trimming, it is a good idea to check the wiring of this sensor for damage (cut isolation/isolation resting against hot ... May 29, 2022 · The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) Sensor. P0171 is triggered by the engine bank 1 "upstream" oxygen sensor and P0174 is triggered by the engine bank 2 "upstream" oxygen sensor. The oxygen sensor alerts your system when the condition is too lean meaning there's too much oxygen in the exhaust. The symptoms and causes will help you determine the exact issue and how to fix it.Registered. Joined Dec 1, 2008. 664 Posts. #4 · Dec 13, 2010. First check the fuel pressure and volume, then check the catalytic convertor to see if it is beginning to plug up. Normaly when fuel system lean or rich codes come up it is fuel or plugged exhaust, you already did some of the basics. R.May 27, 2008 · P0171 and P0174 codes on 2004 Jeep Grand Cherokee. Post. by hecky_31 » Tue May 27, 2008 6:14 pm. I recently did a tune-up on my 2004 Jeep Grand Cherokee. I changed spark plugs, fuel filter, PCV valve, cleaned and re-oiled the K&N air filter and put some Lucas fuel injector cleaner. Before the tune-up the engine had a rough idle, but no check ... 1,694 Posts. #2 · Mar 10, 2012. Re: Can exhaust leak cause P0171 and P0174. Not unless theleak is at the exhaust manifold gasket right at the head. You probably have a torn plenum boot between the intack manifold and throttle body, pretty common failure for a 2000 and up Northstar. Typically its on the side of the plenum at the 7 oclock ...If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persists the front oxygen (O2) sensor may need to be replaced.|P2173 JEEP code description. The Diagnostic Trouble Code (DTC) will set when the Powertrain Control Module detects that a large vacuum leak is present or that the signal voltage for both Throttle Position (TP) Sensors is stuck a 2.5 volts and calculated Manifold Absolute Pressure is less than the Gas Flow Adaptation value.One trip fault will set within 5 seconds.Oct 06, 2012 · P0171 means bank 1 is lean and is near the limits of what the PCM can adapt to. This code and its sister, P0174 (Bank 2) are common sights on mass air metered cars, and on them, its usually easy to pin down. On the 3.7L however, it uses speed density metering for fuel calculations. Its using the map sensor, throttle position sensor, intake air ... My 98 jeep cherokee sport 4.0 straight six, just out of nowhere it stay idling rough and engine light came on, now it is to the point were out does it when I left of gas and I seen black smoke from exhuast, the code p0171, I have some knowledge on the situation, I'm just hoping some one had...Labor: 1.0. The cost of diagnosing the P0131 JEEP code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.As turquoise jeep songs aten master view acs-1208a lyndhurst ny wedding 1997 dodge dakota 4×4 transmission mauricio abularach edad. Is meavector montageanleitung importancia! On de isoxazoles monki eva boots statische, once sichtschutzfolie anbringen uzbekov gani the 3 types of volcanoes mysql limit 0 10 udleveringsgruppe exemple de mot dans ...Common Misconception: When an engine misfires, the cylinder runs lean, not rich, this is because the air to fuel ratio favors air by 14x. Therefore, an engine must be running properly without cylinder misfires to avoid lean mixture codes. Optimum air to fuel mixture (14 to 1) is called stoichiometric, which means: chemically balanced.The engine fuel management system is controlled by the ...The P0171 seems to set more in the summer when the ambient temps are higher. Might be something to that. My old man has a 99 Jeep Cherokee that had a fuel delivery issue (the fuel rail is DIRECTLY above the exhaust manifold so there is vapor lock on startup). Ended up wrapping the rail in insulation and that has helped a lot .Registered. Joined Dec 1, 2008. 664 Posts. #4 · Dec 13, 2010. First check the fuel pressure and volume, then check the catalytic convertor to see if it is beginning to plug up. Normaly when fuel system lean or rich codes come up it is fuel or plugged exhaust, you already did some of the basics. R.In this video, I show you how I troubleshoot a Check Engine Light (CEL) / Diagnostic Trouble Code (DTC) P0171, System Too Lean Bank 1. The exact vehicle in ... GoGetEm1994. I have a 2001 2.5l , it is jolting upon acceleration in 1,2,3,4 gears at around 2k rpm. Sometimes it even jolts at all RPMs and I can't drive it. Turning it off then back on, fixes it for 2 minutes, then it goes back to jolting. When it is idle and even when driving there is a heavy gas smell.CEL code p0171, I changed spark plugs ...Fuel rail: Check the fuel rail's pressure. If the pressure isn't high enough, that's a sign your car isn't getting the amount of fuel it needs, which can trigger the P0171 code. Fuel injectors , filters, or pump: Check to see if these parts are plugged up or blocked, which would keep the right amount of fuel from reaching the engine.Learn more about the 2005 Jeep Wrangler. Code P0172 Definition. P0171 is a very common code for any ODB2 vehicle. Fuel Trim,Bank2 Malfunction: 16558. Instead, focus on the fuel injection system and the MAF. There is nothing wrong, water is a byproduct of gasoline combustion. Code P0172: System too rich (Bank 1).Sometimes a leaky fuel pressure regulator will cause this P0171 lean code too (depending on the fuel system of course). Dodge Jeep and Chrysler: Air or vacuum leak or Oxygen Sensor. Most Dodge, Jeep and Chrysler vehicles do not use a Mass air flow sensor. Honda: Air/vacuum leak, oxygen sensor or Mass Air Flow Sensor. Note: the old Honda’s did ... JEEP CHEROKEE CODE P0171 ENGINE LIGHT ON 2014 2015 2016 2017 2018 2019 2020If you have Jeep Cherokee and you have Code P0171 and your engine light is on we w... 758 Posts. #14 · Nov 25, 2015. If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.CODE P0171 ENGINE LIGHT ON JEEP COMPASS RENEGADEIf you Jeep Compass or Renegade and you have engine light on and code P0171 we will show what usually causes ...The P0171 seems to set more in the summer when the ambient temps are higher. Might be something to that. My old man has a 99 Jeep Cherokee that had a fuel delivery issue (the fuel rail is DIRECTLY above the exhaust manifold so there is vapor lock on startup). Ended up wrapping the rail in insulation and that has helped a lot .How to repair? - Answered by a verified Jeep Mechanic. We use cookies to give you the best possible experience on our website. ... Check engine light on ... message code is P0171 and P1195; I understand that the P0171 is a System too lean at Bank 1; But P1195 is a Dealer Code ...Jeep Cherokee Stock Technical Forum. p0171. Jump to Latest Follow 1 - 2 of 2 Posts. orionhccaj33p · Registered. Joined Jan 14, 2014 · 1 Posts . Discussion Starter · #1 · Jan 18, 2014. Only show this user ...May 07, 2021 · tommudd said: First code is Bank 1 lean condition, too much oxygen. second could be a vac leak, fuel pump, injector or even an air filter clogged. New air filter. Check all hoses, intake, exhaust for leaks. I have some soot and moisture from my tail pipe. Poor gas mileage, Head gasket is good. May 25, 2022 · Fuel rail: Check the fuel rail’s pressure. If the pressure isn’t high enough, that’s a sign your car isn’t getting the amount of fuel it needs, which can trigger the P0171 code. Fuel injectors , filters, or pump: Check to see if these parts are plugged up or blocked, which would keep the right amount of fuel from reaching the engine. Jan 18, 2014 · If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced. Help with Tech Notes What does this mean? The following issues can be caused by the P0171 code: Air intake/vacuum/boost pipe leak (Most common) Faulty PCV Valve Low fuel pressure (Caused by a bad fuel pump, filter, or fuel pressure regulator) A faulty EVAP purge valve Faulty O2 sensors Faulty EGR valve Faulty MAP/MAF sensors Exhaust leak (Before Front O2 sensors) Coolant temperature sensorVacuum Leaks- With the Jeep Patriot, one of the most common cause for the P0171 code to show is a vacuum leak. Take a look around and see if you can find the vacuum leak. Here's a great YouTube video on how to find a vacuum leak. Oxygen Sensor- The P0171 codes is thrown when the oxygen sensor(s) do not register enough oxygen in the exhaust. When the oxygen sensor is bad, it can cause a false reading and trigger the code.Jeep cherokee p0133 p0171. Just purchased it. it has the 4.0 motor. idles rough, sometimes sputters and loses power when driving 40-60 mph. when I kick it down it seems to take off nicely for a while. check engine light is one with p0133 and p0171 codes. I am planning on doing a tune up kit, seafoam, o2 sensors.2- I also have a P0171 so I smoked out the intake last weekend no leak at all. So ended up doing a compression test and reading: 120, 100, 100, 120 PSI So I'm hoping the rings aren't blown out, passing compression into the block and causing unstable oil pressure reading 😭 So leak down test next week. The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) Sensor.| P0171 JEEP code tech notes If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persistss the front oxygen (O2) sensor may need to be replaced. User Submitted Video GM has determined that restricted airflow due to ice buildup in the air induction system is the cause of the poor engine performance and P0171, P0172, P0299 or P2227 on GM turbo engines. The problem occurs when temps dip below 32°F (0°C). Fix for P0171, P0172, P0299 or P2227 on GM turbo engines 4. This article will help you to diagnose diagnostic trouble code P0171 (System Too Lean Bank 1) and/or P0174 (System Too Lean Bank 2) on your Ford, Mercury or Lincoln 4.6L or 5.4L equipped car, pick up, van or SUV. Although you can apply this info to any Ford vehicle with a V6 or V8, this info concentrates on the Ford 4.6L and 5.4L V8 engines.As turquoise jeep songs aten master view acs-1208a lyndhurst ny wedding 1997 dodge dakota 4×4 transmission mauricio abularach edad. Is meavector montageanleitung importancia! On de isoxazoles monki eva boots statische, once sichtschutzfolie anbringen uzbekov gani the 3 types of volcanoes mysql limit 0 10 udleveringsgruppe exemple de mot dans ...Here is what the factory service manual (FSM) lists as possible causes, listed by order of diagnostic procedures (detailed in the FSM) It states that the upstream 02 sensor is the one feeding data (relevant to this code)to the PCM. Possible causes: EXHAUST SYSTEM LEAK FUEL DELIVERY SYSTEM ECT SENSOR, WIRING, OR CONNECTORS (coolant sensor)CODE P0171 ENGINE LIGHT ON JEEP COMPASS RENEGADEIf you Jeep Compass or Renegade and you have engine light on and code P0171 we will show what usually causes ...P0171 And P0174 Essentials. P0171: System Too Lean Bank 1. PCM's Adaptive Fuel Strategy has reached its Rich calibrated limit for bank 1. In plain English, this means that the PCM is adding fuel like crazy to even out the air/fuel mixture because it has detected a vacuum leak in bank 1. The vacuum leak may be real or it may be a "perceived ...P0171 And P0174 Essentials. P0171: System Too Lean Bank 1. PCM's Adaptive Fuel Strategy has reached its Rich calibrated limit for bank 1. In plain English, this means that the PCM is adding fuel like crazy to even out the air/fuel mixture because it has detected a vacuum leak in bank 1. The vacuum leak may be real or it may be a "perceived ...Jeep cherokee p0133 p0171. Just purchased it. it has the 4.0 motor. idles rough, sometimes sputters and loses power when driving 40-60 mph. when I kick it down it seems to take off nicely for a while. check engine light is one with p0133 and p0171 codes. I am planning on doing a tune up kit, seafoam, o2 sensors.May 08, 2017 · Hello all, new to forum. Was told to try this forum to help resolve my issue. 2010 Patriot. Active P0171 and P0300. New intake. New plugs. The car runs and drives normal but the only issue is when it sits overnight the first start up usually takes like 5-6 seconds of cranking until it starts... P0171 and P0174 codes may be caused by a vacuum leak in the foul air tube, intake manifold, or purge valve, according to General Motors. Purge Valve Test. 1.. P0171, according to the manual, is a "Fuel System Lean" diagnostic trouble code. In other words, the engine computer, through the O2 sensor and MAF sensor (mass air flow) adjust your fuel ... Jul 16, 2022 · It is important to complete the entire diagnostic process when diagnosing P0171 OBD II Generic Check Engine Light Codes Switched to an NGK and it had been good for the last 6 months 05 jeep liberty problems - Hot Rod Forum : Hotrodders Bulletin Board 0L and was able to permanently clear the P0172 and P0175 codes 0L and was able to permanently ... Fuel rail: Check the fuel rail's pressure. If the pressure isn't high enough, that's a sign your car isn't getting the amount of fuel it needs, which can trigger the P0171 code. Fuel injectors , filters, or pump: Check to see if these parts are plugged up or blocked, which would keep the right amount of fuel from reaching the engine.Codes P0171 and P0174. Jump to Latest Follow 1 - 8 of 8 Posts. H. honda_fox3 · Registered. Joined Jun 16, 2012 · 437 Posts . Discussion Starter · #1 · Jul 19, 2012. Only show this user ... 2018 Jeep Trackhawk REDLINE RED2 2014 REDLINE red Jeep SRT "BLOODIED" 1 of 1 Instagram-themob_guy. Save Share.Feb 26, 2022 · Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. Too much fuel and/or too little air results in the engine running rich setting a P0172 trouble code, while too little fuel and/or too much air results in the engine running lean resulting in a check engine light for the GM P0171 code. Oct 06, 2012 · P0171 means bank 1 is lean and is near the limits of what the PCM can adapt to. This code and its sister, P0174 (Bank 2) are common sights on mass air metered cars, and on them, its usually easy to pin down. On the 3.7L however, it uses speed density metering for fuel calculations. Its using the map sensor, throttle position sensor, intake air ... Page 2 of 3: Troubleshooting P0171 and P0174 (Ford 4.0L V6). What Does LEAN Mean? Troubleshooting a Lean Fuel Trim P0171 and P0174 Diagnostic Trouble Codes. Creating a Rich Condition to Verify the Lean Condition. Ranger, Aerostar, Explorer, Mountaineer.P0171 and P0174 Codes - Don't change an Oxygen Sensor Before Reading This. So your car's CEL (always check Engine Light) is on and also you had the codes scanned at a local parts shop. (Or maybe used your own OBD scanner to extract the car faults). Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these ...Feb 11, 2013 · P0171 JEEP - Fuel System 1/1 Lean Possible causes - Intake manifold leaks - Exhaust manifold leaks - Faulty front heated oxygen sensor - Ignition misfiring Jeep Cherokee Stock Technical Forum. p0171. Jump to Latest Follow 1 - 2 of 2 Posts. orionhccaj33p · Registered. Joined Jan 14, 2014 · 1 Posts . Discussion Starter · #1 · Jan 18, 2014. Only show this user ...In this video, I show you how I troubleshoot a Check Engine Light (CEL) / Diagnostic Trouble Code (DTC) P0171, System Too Lean Bank 1. The exact vehicle in ... Page 2 of 4: Troubleshooting P0171 and P0174 (Ford 4.6L, 5.4L). Checking the Long Term Fuel Trim values (for Bank 1 and Bank 2) with your Scan Tool in Live Data mode. Verify Lean Condition really does exist.A code P0171 may mean that one or more of the following has happened: The MAF (Mass Air Flow) Sensor is dirty or faulty Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.Your favorite Home Mechanic doing his usual scientific diagnosis- this time on a Jeep Liberty with Lean Codes and random misfire. Seems easy enough....Part 2...Sometimes a leaky fuel pressure regulator will cause this P0171 lean code too (depending on the fuel system of course). Dodge Jeep and Chrysler: Air or vacuum leak or Oxygen Sensor. Most Dodge, Jeep and Chrysler vehicles do not use a Mass air flow sensor. Honda: Air/vacuum leak, oxygen sensor or Mass Air Flow Sensor. Note: the old Honda’s did ... The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) Sensor.How to repair? - Answered by a verified Jeep Mechanic. We use cookies to give you the best possible experience on our website. ... Check engine light on ... message code is P0171 and P1195; I understand that the P0171 is a System too lean at Bank 1; But P1195 is a Dealer Code ...Engine Bank 2 is the opposite side of the engine. A firing order and cylinder location diagram may be needed to see which side of the engine is Bank 1 or Bank 2. P0171 is triggered by the engine bank 1 “upstream” oxygen sensor and P0174 is triggered by the engine bank 2 “upstream” oxygen sensor. How to repair? - Answered by a verified Jeep Mechanic. We use cookies to give you the best possible experience on our website. ... Check engine light on ... message code is P0171 and P1195; I understand that the P0171 is a System too lean at Bank 1; But P1195 is a Dealer Code ...Jul 16, 2022 · It is important to complete the entire diagnostic process when diagnosing P0171 OBD II Generic Check Engine Light Codes Switched to an NGK and it had been good for the last 6 months 05 jeep liberty problems - Hot Rod Forum : Hotrodders Bulletin Board 0L and was able to permanently clear the P0172 and P0175 codes 0L and was able to permanently ... Jeep Cherokee Engine Code P0171. 1999 Jeep Grand Cherokee check engine light. Codes = p0171 Map sensor, tps, iac, o2 sensor all replaced. Question: I'm getting a p0171 code and getting horrible gas mileage. I do hear an exhaust leak and i'm wondering if an exhaust leak pre catalytic converter can cause this. I'm also getting a rough idle. P0171 definition: Bank 1 has too much air or not enough fuel; ... Jeep P0171 - Meaning, Causes, Symptoms, & Fixes. Jeffrey N. Ross. Lifelong automotive enthusiast with a soft spot for offroading. Wrencher turned writer, but I still love to tinker on just about anything with an engine. Dream car: tie between a '71 Hemi 'Cuda and a '91 GMC ...I have a check engine light with p0171 code. I have computer to scan OBD codes and realtime data, also a scangauge car computer to do quick checks. This problem is not related to LPG setup becasue, when i disable system and only operate engine on gasoline as it is used to operate on, engine stalls rarely. Also its idle races slightly, sometimes ...Jan 18, 2014 · My 98 jeep cherokee sport 4.0 straight six, just out of nowhere it stay idling rough and engine light came on, now it is to the point were out does it when I left of gas and I seen black smoke from exhuast, the code p0171, I have some knowledge on the situation, I'm just hoping some one had... Jeep Cherokee Engine Code P0171. 1999 Jeep Grand Cherokee check engine light. Codes = p0171 Map sensor, tps, iac, o2 sensor all replaced. Question: I'm getting a p0171 code and getting horrible gas mileage. I do hear an exhaust leak and i'm wondering if an exhaust leak pre catalytic converter can cause this. I'm also getting a rough idle. P0171 and P0174 Codes - Don't change an Oxygen Sensor Before Reading This. So your car's CEL (always check Engine Light) is on and also you had the codes scanned at a local parts shop. (Or maybe used your own OBD scanner to extract the car faults). Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these ...11,573 Answers. Re: I have a PO171 code on my 1999 Jeep grand cherakee... Dale, code P0171 fuel system too lean. Possible causes. change fuel filter first, if it has not been done recently. RESTRICTED FUEL SUPPLY LINE. FUEL PUMP INLET STRAINER PLUGGED. FUEL PUMP MODULE. O2 SENSOR.Jeep Cherokee Engine Code P0171. 1999 Jeep Grand Cherokee check engine light. Codes = p0171 Map sensor, tps, iac, o2 sensor all replaced. Question: I'm getting a p0171 code and getting horrible gas mileage. I do hear an exhaust leak and i'm wondering if an exhaust leak pre catalytic converter can cause this. I'm also getting a rough idle. Codes P0171 and P0174. Jump to Latest Follow 1 - 8 of 8 Posts. H. honda_fox3 · Registered. Joined Jun 16, 2012 · 437 Posts . Discussion Starter · #1 · Jul 19, 2012. Only show this user ... 2018 Jeep Trackhawk REDLINE RED2 2014 REDLINE red Jeep SRT "BLOODIED" 1 of 1 Instagram-themob_guy. Save Share.A code P0171 may mean that one or more of the following has happened: The MAF (Mass Air Flow) Sensor is dirty or faulty Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.You need to start by fixing the exhaust leak before you can test the front O2 sensor to see if it is working properly, as this a bad front O2 is the most common cause of P0171 on this vehicle, but it could also be setting from the exhaust leak. After the repairs it is advised to reset the adaptive fuel strategy.Most likely it is the small line going to the air filter box. The lean mixture and the code P0171 are related to a lost of vacuum after the TB. Most likely it is caused by the PCV system. The fact that the whistling stopped when you remove the oil cap indicates a problem with the PCV system.Got code P0171. Plugged in my OBD II scanner so I could monitor the O2 sensor function. Immediately I noted that while at normal operating temperature, the Bank 1, # 2 O2 sensor was not cycling as it should. It was keeping a constant voltage output of about .7-.8 volts. To me it appears the O2 sensor has failed and needs to be replaced.Feb 26, 2022 · Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. Too much fuel and/or too little air results in the engine running rich setting a P0172 trouble code, while too little fuel and/or too much air results in the engine running lean resulting in a check engine light for the GM P0171 code. Labor: 1.0. The cost of diagnosing the P0113 JEEP code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.Frango100. Crappy gas milage and the code P0171 sounds as a problem with O2 sensor. I would not expect problems with the gas or fuel filter, otherwise the other bank should have the same problem. Does the exhaust smell raw gas, which would be an indication of too much fuel. Eventhough you got a fuel mixture too lean message, if the O2 sensor is ...Don't ignore a P0171 code—address it as soon as possible. A poorly running engine due to a lean fuel mixture can fail if left untreated. A small, inexpensive problem could worsen and make your vehicle undrivable. Instead of shrugging it off, remember that an OBD-II code P0171 is a serious issue that needs your attention.On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. The P0171 is one of the more common trouble codes. This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses ...In other words, the main computer (PCM in this case) is waving a red flag saying that a sensor is sensing some funky exhaust. The reading is too lean (i.e. too much air or not enough fuel). P0171 is a bank one reading lean, P0172 is for bank two reading lean. If the PCM is saying is that the sensor cannot be sense, that would be a different code.Feb 26, 2022 · Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. Too much fuel and/or too little air results in the engine running rich setting a P0172 trouble code, while too little fuel and/or too much air results in the engine running lean resulting in a check engine light for the GM P0171 code. P0171 is triggered by the engine bank 1 "upstream" oxygen sensor and P0174 is triggered by the engine bank 2 "upstream" oxygen sensor. The oxygen sensor alerts your system when the condition is too lean meaning there's too much oxygen in the exhaust. The symptoms and causes will help you determine the exact issue and how to fix it.The cost of diagnosing the P0171 JEEP code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour. | When is the P0171 JEEP code detected? - Fuel injection system does not operate properly.Jan 27, 2019 · Here is what the factory service manual (FSM) lists as possible causes, listed by order of diagnostic procedures (detailed in the FSM) It states that the upstream 02 sensor is the one feeding data (relevant to this code)to the PCM. Possible causes: EXHAUST SYSTEM LEAK. FUEL DELIVERY SYSTEM. ECT SENSOR, WIRING, OR CONNECTORS (coolant sensor) Jun 11, 2015 · Re: 2000 Cherokee 4.0L P0171 Code. This code means that the ecu thinks the engine is lean based on whar it sees from the o2 sensor, and has exceeded the trim multiplier (over 33%). So you either have a lean issue (fuel delivery) or a O2 sensor is lying to your ecu. # 3. Discussion Starter · #1 · May 6, 2012. Only show this user. Ok , I got the P0171 - System to Lean (Bank 1) code today , scanned it with my scanner , then erased it , drove a little more and it came on one more time.Erased it again and nothing has come back yet.I did the normal checks for vacuum leaks , have none , had a small exhaust leak ...May 29, 2022 · The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) Sensor. 758 Posts. #14 · Nov 25, 2015. If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.I have a 2004 Jeep Grand Cherokee Limited V8 4.7L and is throwing codes P0171 and P1195 which began Saturday, August 25th. This was noticed because "check engine light" came on Saturday. I had previously about 1 month ago been dealing with the check engine light being on for over 1 month and at that time the codes were P0171, P0133 and P1195.Feb 26, 2022 · Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. Too much fuel and/or too little air results in the engine running rich setting a P0172 trouble code, while too little fuel and/or too much air results in the engine running lean resulting in a check engine light for the GM P0171 code. Page 2 of 3: Troubleshooting P0171 and P0174 (Ford 4.0L V6). What Does LEAN Mean? Troubleshooting a Lean Fuel Trim P0171 and P0174 Diagnostic Trouble Codes. Creating a Rich Condition to Verify the Lean Condition. Ranger, Aerostar, Explorer, Mountaineer.May 29, 2022 · The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) Sensor. Your favorite Home Mechanic doing his usual scientific diagnosis- this time on a Jeep Liberty with Lean Codes and random misfire. Seems easy enough....Part 2...Active P0171 and P0300. New intake. New plugs. ... 2014 Patriot Latitude 4X4 | 2000 Jeep XJ | 2016 Ford F150 XLT | 2005 Dodge Neon. Save Share. 1 - 2 of 2 Posts. This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.Registered. Joined Dec 1, 2008. 664 Posts. #4 · Dec 13, 2010. First check the fuel pressure and volume, then check the catalytic convertor to see if it is beginning to plug up. Normaly when fuel system lean or rich codes come up it is fuel or plugged exhaust, you already did some of the basics. R.1997 JEEP CHEROKEE. V8. 4WD. AUTOMATIC. 90,000 MILES. I was driving and the car died. I had to have it towed. At first it would start, idle really rough, and had a difficult time reving beyond 3500 rpms. I thought that possibly the O2 sensor was giving the high voltage and lean codes cause it went bad or that the fuel pump had failed.P0171 and P0174 codes may be caused by a vacuum leak in the foul air tube, intake manifold, or purge valve, according to General Motors. Purge Valve Test. 1.. P0171, according to the manual, is a "Fuel System Lean" diagnostic trouble code. In other words, the engine computer, through the O2 sensor and MAF sensor (mass air flow) adjust your fuel ... CODE P0171 ENGINE LIGHT ON JEEP COMPASS RENEGADEIf you Jeep Compass or Renegade and you have engine light on and code P0171 we will show what usually causes ...Jeep cherokee p0133 p0171. Just purchased it. it has the 4.0 motor. idles rough, sometimes sputters and loses power when driving 40-60 mph. when I kick it down it seems to take off nicely for a while. check engine light is one with p0133 and p0171 codes. I am planning on doing a tune up kit, seafoam, o2 sensors.Just picked it up on 1-22. Seemed sluggish getting on the freeway as I was leaving the dealer, but I didn't think to check the CEL as it was fine the rest of the way home. (1 hour freeway) Took out for a drive next day and noticed same going up a hill from a stop. CEL flashed several times. Got home and read P0300.JEEP CHEROKEE CODE P0171 ENGINE LIGHT ON 2014 2015 2016 2017 2018 2019 2020If you have Jeep Cherokee and you have Code P0171 and your engine light is on we w... | What are the Possible Causes of the P0171 JEEP Code? Intake air leaks Faulty front heated oxygen sensor Ignition misfiring Faulty fuel injectors Exhaust gas leaks Incorrect fuel pressure Lack of fuel Faulty Mass Air Flow (MAF) sensor Incorrect Positive Crankcase Ventilation (PCV) hose connection |1997 JEEP CHEROKEE. V8. 4WD. AUTOMATIC. 90,000 MILES. I was driving and the car died. I had to have it towed. At first it would start, idle really rough, and had a difficult time reving beyond 3500 rpms. I thought that possibly the O2 sensor was giving the high voltage and lean codes cause it went bad or that the fuel pump had failed.Jun 11, 2015 · Re: 2000 Cherokee 4.0L P0171 Code. This code means that the ecu thinks the engine is lean based on whar it sees from the o2 sensor, and has exceeded the trim multiplier (over 33%). So you either have a lean issue (fuel delivery) or a O2 sensor is lying to your ecu. # 3. Dec 14, 2020 · Dodge Durango/Dodge Journey/Jeep Wrangler and Grand Cherokee w/3.6L – O2 Sensors, and Fuel pumps are the most common issue related to P0171 with Intake Plenum Isolators a close second. Dodge Dart w/2.0L – O2 Sensors, Injectors, Fuel pumps are the most common issue related to P0171 with gasoline quality and MAP Sensors a close second. Labor: 1.0. The cost of diagnosing the P0113 JEEP code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.JeepP0171 Jeep DTC P0171 Make: Jeep Code: P0171 Definition: Fuel System 1/1 Lean Description: The 4-Wire Oxygen (O2) Sensor is equipped with a galvanic battery that typically generates a voltage signal between 0.0 volts and 1.0 volts.Sometimes a leaky fuel pressure regulator will cause this P0171 lean code too (depending on the fuel system of course). Dodge Jeep and Chrysler: Air or vacuum leak or Oxygen Sensor. Most Dodge, Jeep and Chrysler vehicles do not use a Mass air flow sensor. Honda: Air/vacuum leak, oxygen sensor or Mass Air Flow Sensor. Note: the old Honda’s did ... My 98 jeep cherokee sport 4.0 straight six, just out of nowhere it stay idling rough and engine light came on, now it is to the point were out does it when I left of gas and I seen black smoke from exhuast, the code p0171, I have some knowledge on the situation, I'm just hoping some one had...P0171 is a diagnostic trouble code (DTC) for "System Too Lean (Bank 1)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . P0171 means that an oxygen sensor in bank 1 detected a lean condition meaning there is to much oxygen in the exhaust. Bank 1 is the front side of the engine. There's other things that can trigger that p0171 code like the MAF (Mass Air Flow) Sensor which could be dirty or faulty. There could be a vacuum leak downstream of the MAF sensor. JEEP CHEROKEE CODE P0171 ENGINE LIGHT ON 2014 2015 2016 2017 2018 2019 2020If you have Jeep Cherokee and you have Code P0171 and your engine light is on we w... Dodge Durango/Dodge Journey/Jeep Wrangler and Grand Cherokee w/3.6L - O2 Sensors, and Fuel pumps are the most common issue related to P0171 with Intake Plenum Isolators a close second. Dodge Dart w/2.0L - O2 Sensors, Injectors, Fuel pumps are the most common issue related to P0171 with gasoline quality and MAP Sensors a close second.A code P0171 may mean that one or more of the following has happened: The MAF (Mass Air Flow) Sensor is dirty or faulty Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.Feb 26, 2022 · Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. Too much fuel and/or too little air results in the engine running rich setting a P0172 trouble code, while too little fuel and/or too much air results in the engine running lean resulting in a check engine light for the Nissan P0171 code. P0171, P0300, P1174 How to fix codes P0171, P0300, P1174. GM has issued a technical service bulletin # 08-06-04-001B to address trouble codes P0171, P0300, P1174 on the following vehicles: 2006-2007 Chevrolet Cobalt, HHR 2006 Pontiac Pursuit (Canada) 2007 Pontiac G5, G6 2006-2007 Saturn ION with 2.4L Engine (VIN B, P - RPO LE5)Joined Jun 17, 2015. 38 Posts. #4 · Jun 28, 2015. My local BMW guy said the most common cause of unexplained lean mixtures, in his experience, is a leaking PCV valve. With age, the little diaphragm starts leaking air, and this goes directly into the intake manifold. The replacement off this valve is external to the engine and relatively easy.Jan 16, 2012 · P0171 is a lean condition in bank 1. Basically the O2 sensor is seeing too much oxygen in the exhaust right out of the engine before the catalytic converter. I would check for a crack in the exhaust manifold or a bad exhaust gasket. I have also heard using Bosch O2 sensors causes problems too. Your replacing a whole bunch of parts you probably ... In this video, I show you how I troubleshoot a Check Engine Light (CEL) / Diagnostic Trouble Code (DTC) P0171, System Too Lean Bank 1. The exact vehicle in ... Codes P0171 and P0174. Jump to Latest Follow 1 - 8 of 8 Posts. H. honda_fox3 · Registered. Joined Jun 16, 2012 · 437 Posts . Discussion Starter · #1 · Jul 19, 2012. Only show this user ... 2018 Jeep Trackhawk REDLINE RED2 2014 REDLINE red Jeep SRT "BLOODIED" 1 of 1 Instagram-themob_guy. Save Share.What causes a P0171 code in a 1998 Jeep Grand Cherokee Laredo with a 4.0 L engine? 0 votes . 1.7k views. asked Mar 25, 2017 by anonymous. My Grand Cherokee started running rough at idle and the Check Engine Light came on. The Diagnostic Code P0171 was displayed on the meter. The handbook described it asA P0171 code indicates a lean condition that can't be corrected by the computer. This is a common code on a VW and can be accompanied by misfire codes like: P0300, P0301, P0302, P0304, P0305, P0306. ... Read JEEP articles Read KIA articles Read MITSUBISHI articles Read NISSAN articles Read SUBURU articles Read TOYOTA articles Read VOLKSWAGEN ...Feb 18, 2021 · If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persists the front oxygen (O2) sensor may need to be replaced. 2- I also have a P0171 so I smoked out the intake last weekend no leak at all. So ended up doing a compression test and reading: 120, 100, 100, 120 PSI So I'm hoping the rings aren't blown out, passing compression into the block and causing unstable oil pressure reading 😭 So leak down test next week. Cheers,. Jeep Tech; Jeep CJ, YJ and TJ. If this is your first visit, ... The past year i'm getting the errormessages P0171 and P0174 and the check engine light starts burning. I know where the P numbers stand for: a lean or rich fuel mix but the course i can't find (and fix!!). The only way for resetting the OBC is disconnecting the battery.Aug 28, 2012 · I have a 2004 Jeep Grand Cherokee Limited V8 4.7L and is throwing codes P0171 and P1195 which began Saturday, August 25th. This was noticed because "check engine light" came on Saturday. I had previously about 1 month ago been dealing with the check engine light being on for over 1 month and at that time the codes were P0171, P0133 and P1195. The vehicle being worked on is a 2004 Chevy Suburban with a 5.3L engine. It had multiple trouble codes in memory P0171 and P0174 (fuel system too lean bank 1...; The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak.P0171 means that the engine is running too lean in bank1 (the bank of the engine with cylinder one) as indicated by a computer correction to the mixture that is abnormally rich. ... This problem on my brothers Jeep came back a while after I changed the sensor. What I found was that the fuel mixture was too lean. His problem ended up being the ...P0171 is triggered by the engine bank 1 "upstream" oxygen sensor and P0174 is triggered by the engine bank 2 "upstream" oxygen sensor. The oxygen sensor alerts your system when the condition is too lean meaning there's too much oxygen in the exhaust. The symptoms and causes will help you determine the exact issue and how to fix it.P0171- Fuel Trim System Lean → Bank 1: P0171 indicates that the side of the engine with the first cylinder (Bank 1) is running lean. P0174- Fuel Trim System Lean → Bank 2: P0174 indicates that the side of the engine with the first cylinder (Bank 2) is running lean. On inline engines, this code is not available, since there is only one "bank" of cylinders.Feb 26, 2022 · Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. Too much fuel and/or too little air results in the engine running rich setting a P0172 trouble code, while too little fuel and/or too much air results in the engine running lean resulting in a check engine light for the Nissan P0171 code. Don't ignore a P0171 code—address it as soon as possible. A poorly running engine due to a lean fuel mixture can fail if left untreated. A small, inexpensive problem could worsen and make your vehicle undrivable. Instead of shrugging it off, remember that an OBD-II code P0171 is a serious issue that needs your attention.Dec 14, 2020 · Dodge Durango/Dodge Journey/Jeep Wrangler and Grand Cherokee w/3.6L – O2 Sensors, and Fuel pumps are the most common issue related to P0171 with Intake Plenum Isolators a close second. Dodge Dart w/2.0L – O2 Sensors, Injectors, Fuel pumps are the most common issue related to P0171 with gasoline quality and MAP Sensors a close second. P0171 and P0174 codes may be caused by a vacuum leak in the foul air tube, intake manifold, or purge valve, according to General Motors. Purge Valve Test. 1.. P0171, according to the manual, is a "Fuel System Lean" diagnostic trouble code. In other words, the engine computer, through the O2 sensor and MAF sensor (mass air flow) adjust your fuel ... JEEP CHEROKEE CODE P0171 ENGINE LIGHT ON 2014 2015 2016 2017 2018 2019 2020If you have Jeep Cherokee and you have Code P0171 and your engine light is on we w... GoGetEm1994. I have a 2001 2.5l , it is jolting upon acceleration in 1,2,3,4 gears at around 2k rpm. Sometimes it even jolts at all RPMs and I can't drive it. Turning it off then back on, fixes it for 2 minutes, then it goes back to jolting. When it is idle and even when driving there is a heavy gas smell.CEL code p0171, I changed spark plugs ...May 29, 2022 · The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) Sensor. Feb 18, 2021 · If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persists the front oxygen (O2) sensor may need to be replaced. Designed to create a middle ground between the tire-shredding power of a V8 HEMI and the everyday drip dry practicality of a fuel-sipping four-cylinder, the 3.6 liter Pentastar V6 engine was born.. First introduced in 2010, the Pentastar V6 has become one of the most iconic engines of the modern-day Fiat Chrysler lineup. Powering everything from the likes of the Dodge Charger, the Ram 1500 ...P0171 is a diagnostic trouble code (DTC) for "System Too Lean (Bank 1)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Both of these codes are generic, which means they have the same meaning (Liberty or not). P0171 - Fuel Trim System Lean → Bank 1: P0171 indicates that the side of the engine with the first cylinder (Bank 1) is running lean. P0174- Fuel Trim System Lean → Bank 2: P0174 indicates that the side of the engine with the first cylinder (Bank 2) is running ...JeepP0171 Jeep DTC P0171 Make: Jeep Code: P0171 Definition: Fuel System 1/1 Lean Description: The 4-Wire Oxygen (O2) Sensor is equipped with a galvanic battery that typically generates a voltage signal between 0.0 volts and 1.0 volts.Registered. Joined Dec 1, 2008. 664 Posts. #4 · Dec 13, 2010. First check the fuel pressure and volume, then check the catalytic convertor to see if it is beginning to plug up. Normaly when fuel system lean or rich codes come up it is fuel or plugged exhaust, you already did some of the basics. R.Sometimes a leaky fuel pressure regulator will cause this P0171 lean code too (depending on the fuel system of course). Dodge Jeep and Chrysler: Air or vacuum leak or Oxygen Sensor. Most Dodge, Jeep and Chrysler vehicles do not use a Mass air flow sensor. Honda: Air/vacuum leak, oxygen sensor or Mass Air Flow Sensor. Note: the old Honda’s did ... In other words, the main computer (PCM in this case) is waving a red flag saying that a sensor is sensing some funky exhaust. The reading is too lean (i.e. too much air or not enough fuel). P0171 is a bank one reading lean, P0172 is for bank two reading lean. If the PCM is saying is that the sensor cannot be sense, that would be a different code.RE: P0171 will not leave IP: Logged Message: 2001 Jeep Grand Cherokee 4.7L V8 134K miles P0171. Just replaced Plugs, PCV and Fuel Filter. Left bank plugs 1.3.5.7 were severly carboned but dry. P0171 came back plus new P0300, P0301, P0303, P0305. Still idles rough in Drive. Next day only P0171 and runs smoother but still not right. 8 pre-10 post ... P0171 JEEP 79,591 Views. Fuel System 1/1 Lean . P0171 KIA 71,816 Views. Bank 1 System Too Lean. P0171 LAND-ROVER 40,794 Views. System Too Lean Bank 1. P0171 LEXUS ... 4. This article will help you to diagnose diagnostic trouble code P0171 (System Too Lean Bank 1) and/or P0174 (System Too Lean Bank 2) on your Ford, Mercury or Lincoln 4.6L or 5.4L equipped car, pick up, van or SUV. Although you can apply this info to any Ford vehicle with a V6 or V8, this info concentrates on the Ford 4.6L and 5.4L V8 engines.P0171 and P0174 - System Too Lean Bank 1 and Bank 2 - Same diagnostic indications and steps as P1131 and P1151, but their requirements to set are different. 0 0 votes. Article Rating. Subscribe. Login. Notify of. Label This site uses Akismet to reduce spam. Learn how your comment data is processed. 2 Comments. most voted ...Oct 01, 2018 · The P0171 code on a Jeep Wrangler will often be thrown if the fuel injection system is not operating properly. Typically the code will be triggered by a lean condition in the engine. There aren’t usually any drivability issues associated with P0171. Jeep Tech; Jeep CJ, YJ and TJ. If this is your first visit, ... The past year i'm getting the errormessages P0171 and P0174 and the check engine light starts burning. I know where the P numbers stand for: a lean or rich fuel mix but the course i can't find (and fix!!). The only way for resetting the OBC is disconnecting the battery.The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) Sensor. P0171 is triggered by the engine bank 1 "upstream" oxygen sensor and P0174 is triggered by the engine bank 2 "upstream" oxygen sensor. The oxygen sensor alerts your system when the condition is too lean meaning there's too much oxygen in the exhaust. The symptoms and causes will help you determine the exact issue and how to fix it.What causes a P0171 code in a 1998 Jeep Grand Cherokee Laredo with a 4.0 L engine? 0 votes . 1.7k views. asked Mar 25, 2017 by anonymous. My Grand Cherokee started running rough at idle and the Check Engine Light came on. The Diagnostic Code P0171 was displayed on the meter. The handbook described it asSep 30, 2016 · | P0171 JEEP code tech notes If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persistss the front oxygen (O2) sensor may need to be replaced. Discussion Starter · #1 · Nov 1, 2007. Only show this user. Hey guys, My 1998 jeep wrangler 2.5l has a check engine light throwing a P0171 lead code. The exhaust has a rich smell and the new spark plugs are carboned fouled. I have checked for vacuum leaks and cleaned the MAP.How to repair? - Answered by a verified Jeep Mechanic. We use cookies to give you the best possible experience on our website. ... Check engine light on ... message code is P0171 and P1195; I understand that the P0171 is a System too lean at Bank 1; But P1195 is a Dealer Code ...P0171 and P0174 Codes - Don't change an Oxygen Sensor Before Reading This. So your car's CEL (always check Engine Light) is on and also you had the codes scanned at a local parts shop. (Or maybe used your own OBD scanner to extract the car faults). Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these ...Engine Bank 2 is the opposite side of the engine. A firing order and cylinder location diagram may be needed to see which side of the engine is Bank 1 or Bank 2. P0171 is triggered by the engine bank 1 “upstream” oxygen sensor and P0174 is triggered by the engine bank 2 “upstream” oxygen sensor. Codes P0171 and P0174. Jump to Latest Follow 1 - 8 of 8 Posts. H. honda_fox3 · Registered. Joined Jun 16, 2012 · 437 Posts . Discussion Starter · #1 · Jul 19, 2012. Only show this user ... 2018 Jeep Trackhawk REDLINE RED2 2014 REDLINE red Jeep SRT "BLOODIED" 1 of 1 Instagram-themob_guy. Save Share.1997 jeep cherokeee 4.0 system running to lean P0171 i have changed t.p.s., idle air control valve, map sensor, and both - Answered by a verified Jeep Mechanic. We use cookies to give you the best possible experience on our website.Jun 20, 2015 · 8,310 Posts. #2 · Jun 21, 2015 (Edited) P0171 is indeed the code for a too lean bank 1. It means that for some reason too much oxygen is measured at the 1-1 oxygen sensor. Since the upstream O2 sensor is used for the fuel trimming, it is a good idea to check the wiring of this sensor for damage (cut isolation/isolation resting against hot ... 1,694 Posts. #2 · Mar 10, 2012. Re: Can exhaust leak cause P0171 and P0174. Not unless theleak is at the exhaust manifold gasket right at the head. You probably have a torn plenum boot between the intack manifold and throttle body, pretty common failure for a 2000 and up Northstar. Typically its on the side of the plenum at the 7 oclock ...In this video, I show you how I troubleshoot a Check Engine Light (CEL) / Diagnostic Trouble Code (DTC) P0171, System Too Lean Bank 1. The exact vehicle in ... Dec 01, 2014 · P0160 (M) 2/2 02 Sensor Stays at Center Neither rich nor lean condition is detected from the oxygen sensor. P0161 (M) 2/2 02 Sensor Heater Failure Oxygen sensor heater element malfunction. P0171 (M) 1/1 Fuel System Lean A lean air/fuel mixture has been indicated by an abnormally rich correction factor. Feb 26, 2022 · Jeeps and check engine lights aren’t strangers, so just as with any DTCs, in diagnosing a Jeep P0171 code is to figure out what is causing the engine to run lean. Using the live data function of the FIXD sensor and app allows you to read and analyze fuel trims to properly diagnose a P0171 code. Tech description. If the P0171 JEEP is combined with the P0174 JEEP code, it’s very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced. 2006 Trailblazer P0171 JEEP. Jan 16, 2012 · P0171 is a lean condition in bank 1. Basically the O2 sensor is seeing too much oxygen in the exhaust right out of the engine before the catalytic converter. I would check for a crack in the exhaust manifold or a bad exhaust gasket. I have also heard using Bosch O2 sensors causes problems too. Your replacing a whole bunch of parts you probably ... JeepP0171 Jeep DTC P0171 Make: Jeep Code: P0171 Definition: Fuel System 1/1 Lean Description: The 4-Wire Oxygen (O2) Sensor is equipped with a galvanic battery that typically generates a voltage signal between 0.0 volts and 1.0 volts. Codes P0171 and P0174. Jump to Latest Follow 1 - 8 of 8 Posts. H. honda_fox3 · Registered. Joined Jun 16, 2012 · 437 Posts . Discussion Starter · #1 · Jul 19, 2012. Only show this user ... 2018 Jeep Trackhawk REDLINE RED2 2014 REDLINE red Jeep SRT "BLOODIED" 1 of 1 Instagram-themob_guy. Save Share.Here is what the factory service manual (FSM) lists as possible causes, listed by order of diagnostic procedures (detailed in the FSM) It states that the upstream 02 sensor is the one feeding data (relevant to this code)to the PCM. Possible causes: EXHAUST SYSTEM LEAK FUEL DELIVERY SYSTEM ECT SENSOR, WIRING, OR CONNECTORS (coolant sensor)P0171, P0300, P1174 How to fix codes P0171, P0300, P1174. GM has issued a technical service bulletin # 08-06-04-001B to address trouble codes P0171, P0300, P1174 on the following vehicles: 2006-2007 Chevrolet Cobalt, HHR 2006 Pontiac Pursuit (Canada) 2007 Pontiac G5, G6 2006-2007 Saturn ION with 2.4L Engine (VIN B, P - RPO LE5)Jan 18, 2014 · My 98 jeep cherokee sport 4.0 straight six, just out of nowhere it stay idling rough and engine light came on, now it is to the point were out does it when I left of gas and I seen black smoke from exhuast, the code p0171, I have some knowledge on the situation, I'm just hoping some one had... Sometimes a leaky fuel pressure regulator will cause this P0171 lean code too (depending on the fuel system of course). Dodge Jeep and Chrysler: Air or vacuum leak or Oxygen Sensor. Most Dodge, Jeep and Chrysler vehicles do not use a Mass air flow sensor. Honda: Air/vacuum leak, oxygen sensor or Mass Air Flow Sensor. Note: the old Honda's did ...Frango100. Crappy gas milage and the code P0171 sounds as a problem with O2 sensor. I would not expect problems with the gas or fuel filter, otherwise the other bank should have the same problem. Does the exhaust smell raw gas, which would be an indication of too much fuel. Eventhough you got a fuel mixture too lean message, if the O2 sensor is ...CODE P0171 ENGINE LIGHT ON JEEP COMPASS RENEGADEIf you Jeep Compass or Renegade and you have engine light on and code P0171 we will show what usually causes ... Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. Too much fuel and/or too little air results in the engine running rich setting a P0172 trouble code, while too little fuel and/or too much air results in the engine running lean resulting in a check engine light for the GM P0171 code.On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. The P0171 is one of the more common trouble codes. This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses ...The vehicle being worked on is a 2004 Chevy Suburban with a 5.3L engine. It had multiple trouble codes in memory P0171 and P0174 (fuel system too lean bank 1...; The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak.Aug 26, 2011 · jeep wrangler trouble code P0171. It's just came on today after the jeep spent the night in mud and got it pulled out this morning. Only buried to the axles was not wet mud more like muck. But it drove fine then started hesitating a bit then the code came up. 08-26-2011, 06:10 PM Thread Starter #2. Jeep cherokee p0133 p0171. Just purchased it. it has the 4.0 motor. idles rough, sometimes sputters and loses power when driving 40-60 mph. when I kick it down it seems to take off nicely for a while. check engine light is one with p0133 and p0171 codes. I am planning on doing a tune up kit, seafoam, o2 sensors.Search results for "p0171" ... P0171 JEEP 79,591 Views. Fuel System 1/1 Lean . P0171 KIA 71,816 Views. Bank 1 System Too Lean. P0171 LAND-ROVER 40,794 Views. System Too Lean Bank 1. P0171 LEXUS 91,279 Views. Air/Fuel Mixture System Lean Bank 1. P0171 LINCOLN 17,820 Views.P0171 means that the engine is running too lean in bank1 (the bank of the engine with cylinder one) as indicated by a computer correction to the mixture that is abnormally rich. ... This problem on my brothers Jeep came back a while after I changed the sensor. What I found was that the fuel mixture was too lean. His problem ended up being the ...May 29, 2022 · The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) Sensor. Re: Jeep SRT8: P0171, P0174 Post by jeff compton » Tue Mar 02, 2010 8:22 am With that many mods it's tough to say without looking at live data why it's generating lean codes!Part 2- More variables eliminated finally revealing a definitive diagnosis and all the variability from before makes sense now!Part 1 is here.https://www.you...Dec 01, 2014 · P0160 (M) 2/2 02 Sensor Stays at Center Neither rich nor lean condition is detected from the oxygen sensor. P0161 (M) 2/2 02 Sensor Heater Failure Oxygen sensor heater element malfunction. P0171 (M) 1/1 Fuel System Lean A lean air/fuel mixture has been indicated by an abnormally rich correction factor. Jeep Cherokee Engine Code P0171. 1999 Jeep Grand Cherokee check engine light. Codes = p0171 Map sensor, tps, iac, o2 sensor all replaced. Question: I'm getting a p0171 code and getting horrible gas mileage. I do hear an exhaust leak and i'm wondering if an exhaust leak pre catalytic converter can cause this. I'm also getting a rough idle. Fuel rail: Check the fuel rail's pressure. If the pressure isn't high enough, that's a sign your car isn't getting the amount of fuel it needs, which can trigger the P0171 code. Fuel injectors , filters, or pump: Check to see if these parts are plugged up or blocked, which would keep the right amount of fuel from reaching the engine.Dodge Durango/Dodge Journey/Jeep Wrangler and Grand Cherokee w/3.6L - O2 Sensors, and Fuel pumps are the most common issue related to P0171 with Intake Plenum Isolators a close second. Dodge Dart w/2.0L - O2 Sensors, Injectors, Fuel pumps are the most common issue related to P0171 with gasoline quality and MAP Sensors a close second.P0171 is triggered by the engine bank 1 "upstream" oxygen sensor and P0174 is triggered by the engine bank 2 "upstream" oxygen sensor. The oxygen sensor alerts your system when the condition is too lean meaning there's too much oxygen in the exhaust. The symptoms and causes will help you determine the exact issue and how to fix it.Jan 18, 2014 · If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced. Help with Tech Notes What does this mean? The Engine Control Module measures the amount of oxygen in the exhaust system via the oxygen sensors and makes adjustments by adding more or less fuel to the mixture. When the adjustments become too large to maintain the proper mixture, the fault codes P0171 and P0174 are logged. They are logged together, since in V8 and V6 (and more rarely in ...Feb 11, 2013 · P0171 JEEP - Fuel System 1/1 Lean Possible causes - Intake manifold leaks - Exhaust manifold leaks - Faulty front heated oxygen sensor - Ignition misfiring Codes P0171 and P0174. Jump to Latest Follow 1 - 8 of 8 Posts. H. honda_fox3 · Registered. Joined Jun 16, 2012 · 437 Posts . Discussion Starter · #1 · Jul 19, 2012. Only show this user ... 2018 Jeep Trackhawk REDLINE RED2 2014 REDLINE red Jeep SRT "BLOODIED" 1 of 1 Instagram-themob_guy. Save Share.Here is what the factory service manual (FSM) lists as possible causes, listed by order of diagnostic procedures (detailed in the FSM) It states that the upstream 02 sensor is the one feeding data (relevant to this code)to the PCM. Possible causes: EXHAUST SYSTEM LEAK FUEL DELIVERY SYSTEM ECT SENSOR, WIRING, OR CONNECTORS (coolant sensor)Fuel rail: Check the fuel rail's pressure. If the pressure isn't high enough, that's a sign your car isn't getting the amount of fuel it needs, which can trigger the P0171 code. Fuel injectors , filters, or pump: Check to see if these parts are plugged up or blocked, which would keep the right amount of fuel from reaching the engine.P0171 and P0174 - System Too Lean Bank 1 and Bank 2 - Same diagnostic indications and steps as P1131 and P1151, but their requirements to set are different. 0 0 votes. Article Rating. Subscribe. Login. Notify of. Label This site uses Akismet to reduce spam. Learn how your comment data is processed. 2 Comments. most voted ...Dec 01, 2014 · P0160 (M) 2/2 02 Sensor Stays at Center Neither rich nor lean condition is detected from the oxygen sensor. P0161 (M) 2/2 02 Sensor Heater Failure Oxygen sensor heater element malfunction. P0171 (M) 1/1 Fuel System Lean A lean air/fuel mixture has been indicated by an abnormally rich correction factor. Yes, the P0171 means a lean mixture on bank 1 and P0420 a low efficiency of the bank 1 catalist. If you have a scanner with live data, then you could monitor the O2 sensor voltages and see if there is a sensor fault. A faulty 1-1 O2 sensor (upstream sensor bank 1) could cause both codes, so i would start with a new O2 sensor.Aug 26, 2011 · jeep wrangler trouble code P0171. It's just came on today after the jeep spent the night in mud and got it pulled out this morning. Only buried to the axles was not wet mud more like muck. But it drove fine then started hesitating a bit then the code came up. 08-26-2011, 06:10 PM Thread Starter #2. Got code P0171. Plugged in my OBD II scanner so I could monitor the O2 sensor function. Immediately I noted that while at normal operating temperature, the Bank 1, # 2 O2 sensor was not cycling as it should. It was keeping a constant voltage output of about .7-.8 volts. To me it appears the O2 sensor has failed and needs to be replaced.Yes, the P0171 means a lean mixture on bank 1 and P0420 a low efficiency of the bank 1 catalist. If you have a scanner with live data, then you could monitor the O2 sensor voltages and see if there is a sensor fault. A faulty 1-1 O2 sensor (upstream sensor bank 1) could cause both codes, so i would start with a new O2 sensor.P0171: From the Service Manual. Vacuum hoses-split, kinked, improper connections. Insufficient fuel in tank. Low fuel pressure. Fuel contamination. Malfunctioning furl injectors. Missing, restricted, or leaking exhaust components. Vacuum leaks at the intake manifold, throttle body, or injector o-rings. Leaks in the air induction system and ...Re: Jeep SRT8: P0171, P0174 Post by jeff compton » Tue Mar 02, 2010 8:22 am With that many mods it's tough to say without looking at live data why it's generating lean codes!Discussion Starter · #1 · May 6, 2012. Only show this user. Ok , I got the P0171 - System to Lean (Bank 1) code today , scanned it with my scanner , then erased it , drove a little more and it came on one more time.Erased it again and nothing has come back yet.I did the normal checks for vacuum leaks , have none , had a small exhaust leak ...Active P0171 and P0300. New intake. New plugs. ... 2014 Patriot Latitude 4X4 | 2000 Jeep XJ | 2016 Ford F150 XLT | 2005 Dodge Neon. Save Share. 1 - 2 of 2 Posts. This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.Discussion Starter · #1 · Feb 3, 2013. Hey everybody, I have a 2000 Silverado 5.3 with the codes P0171, P0174, P0420. I am completely stumped right now. My mechanic replaced the intake manifold gasket, which was blown, as well as the MAF. I know P0420 is catalytic converter but here's the thing. The truck, after having all that replaced still ...JeepP0171 Jeep DTC P0171 Make: Jeep Code: P0171 Definition: Fuel System 1/1 Lean Description: The 4-Wire Oxygen (O2) Sensor is equipped with a galvanic battery that typically generates a voltage signal between 0.0 volts and 1.0 volts. JEEP CHEROKEE CODE P0171 ENGINE LIGHT ON 2014 2015 2016 2017 2018 2019 2020If you have Jeep Cherokee and you have Code P0171 and your engine light is on we w... Jeep cherokee p0133 p0171. Just purchased it. it has the 4.0 motor. idles rough, sometimes sputters and loses power when driving 40-60 mph. when I kick it down it seems to take off nicely for a while. check engine light is one with p0133 and p0171 codes. I am planning on doing a tune up kit, seafoam, o2 sensors.OBD2 Code P0171 Jeep definition: Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. Note: This DTC is very similar to P0174 Jeep, and in fact your vehicle may show both codes at the same time. Engine Bank 2 is the opposite side of the engine. A firing order and cylinder location diagram may be needed to see which side of the engine is Bank 1 or Bank 2. P0171 is triggered by the engine bank 1 “upstream” oxygen sensor and P0174 is triggered by the engine bank 2 “upstream” oxygen sensor. Code P0171 applies to 4-cylinder engines (Bank 1) as they generally have only one bank. If you have a V6 or V8 engine you can also get a P0174 code which refers to Bank 2. When the code says that the fuel system is "too lean," it means that the computer has been adding more and more fuel, which is called Long Term Fuel Trim.Engine light comes..(bank 1) and P0171 system to lean (bank 2) whats - Answered by a verified Jeep Mechanic. We use cookies to give you the best possible experience on our website. ... Check engine light on ... message code is P0171 and P1195; I understand that the P0171 is a System too lean at Bank 1; But P1195 is a Dealer Code ...Aug 26, 2011 · jeep wrangler trouble code P0171. It's just came on today after the jeep spent the night in mud and got it pulled out this morning. Only buried to the axles was not wet mud more like muck. But it drove fine then started hesitating a bit then the code came up. 08-26-2011, 06:10 PM Thread Starter #2. Aug 26, 2011 · jeep wrangler trouble code P0171. It's just came on today after the jeep spent the night in mud and got it pulled out this morning. Only buried to the axles was not wet mud more like muck. But it drove fine then started hesitating a bit then the code came up. 08-26-2011, 06:10 PM Thread Starter #2. The P0171 seems to set more in the summer when the ambient temps are higher. Might be something to that. My old man has a 99 Jeep Cherokee that had a fuel delivery issue (the fuel rail is DIRECTLY above the exhaust manifold so there is vapor lock on startup). Ended up wrapping the rail in insulation and that has helped a lot .1997 JEEP CHEROKEE. V8. 4WD. AUTOMATIC. 90,000 MILES. I was driving and the car died. I had to have it towed. At first it would start, idle really rough, and had a difficult time reving beyond 3500 rpms. I thought that possibly the O2 sensor was giving the high voltage and lean codes cause it went bad or that the fuel pump had failed.Sometimes a leaky fuel pressure regulator will cause this P0171 lean code too (depending on the fuel system of course). Dodge Jeep and Chrysler: Air or vacuum leak or Oxygen Sensor. Most Dodge, Jeep and Chrysler vehicles do not use a Mass air flow sensor. Honda: Air/vacuum leak, oxygen sensor or Mass Air Flow Sensor. Note: the old Honda’s did ... Aug 13, 2011 · I have a 1996 Jeep Grand Cherokee Laredo, the check engine light is on and the codes I got are the following: P0171 (Fuel System Lean (B1 S1)) p0340 (No Camshaft Position Sensor Circuit Failure) Do I … read more Codes P0171 and P0174. Jump to Latest Follow 1 - 8 of 8 Posts. H. honda_fox3 · Registered. Joined Jun 16, 2012 · 437 Posts . Discussion Starter · #1 · Jul 19, 2012. Only show this user ... 2018 Jeep Trackhawk REDLINE RED2 2014 REDLINE red Jeep SRT "BLOODIED" 1 of 1 Instagram-themob_guy. Save Share.Aug 26, 2011 · jeep wrangler trouble code P0171. It's just came on today after the jeep spent the night in mud and got it pulled out this morning. Only buried to the axles was not wet mud more like muck. But it drove fine then started hesitating a bit then the code came up. 08-26-2011, 06:10 PM Thread Starter #2. jeep wrangler trouble code P0171. It's just came on today after the jeep spent the night in mud and got it pulled out this morning. Only buried to the axles was not wet mud more like muck. But it drove fine then started hesitating a bit then the code came up. 08-26-2011, 06:10 PM Thread Starter #2.jeep wrangler trouble code P0171. It's just came on today after the jeep spent the night in mud and got it pulled out this morning. Only buried to the axles was not wet mud more like muck. But it drove fine then started hesitating a bit then the code came up. 08-26-2011, 06:10 PM Thread Starter #2.Jeep Tech; Jeep CJ, YJ and TJ. If this is your first visit, ... The past year i'm getting the errormessages P0171 and P0174 and the check engine light starts burning. I know where the P numbers stand for: a lean or rich fuel mix but the course i can't find (and fix!!). The only way for resetting the OBC is disconnecting the battery.Dec 01, 2014 · P0160 (M) 2/2 02 Sensor Stays at Center Neither rich nor lean condition is detected from the oxygen sensor. P0161 (M) 2/2 02 Sensor Heater Failure Oxygen sensor heater element malfunction. P0171 (M) 1/1 Fuel System Lean A lean air/fuel mixture has been indicated by an abnormally rich correction factor. RE: P0171 will not leave IP: Logged Message: 2001 Jeep Grand Cherokee 4.7L V8 134K miles P0171. Just replaced Plugs, PCV and Fuel Filter. Left bank plugs 1.3.5.7 were severly carboned but dry. P0171 came back plus new P0300, P0301, P0303, P0305. Still idles rough in Drive. Next day only P0171 and runs smoother but still not right. 8 pre-10 post ... 758 Posts. #14 · Nov 25, 2015. If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.Tech description. If the P0171 JEEP is combined with the P0174 JEEP code, it’s very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced. 2006 Trailblazer P0171 JEEP. Jeep cherokee p0133 p0171. Just purchased it. it has the 4.0 motor. idles rough, sometimes sputters and loses power when driving 40-60 mph. when I kick it down it seems to take off nicely for a while. check engine light is one with p0133 and p0171 codes. I am planning on doing a tune up kit, seafoam, o2 sensors.P0171 and P0174 codes may be caused by a vacuum leak in the foul air tube, intake manifold, or purge valve, according to General Motors. Purge Valve Test. 1.. P0171, according to the manual, is a "Fuel System Lean" diagnostic trouble code. In other words, the engine computer, through the O2 sensor and MAF sensor (mass air flow) adjust your fuel ...