P0171 ford - A P0171 code is set by your vehicle’s powertrain control module when the air-to-fuel ratio is too lean. This means that the engine is receiving too much air into the …

 
Sep 14, 2023 · Let’s take a quick look at a brief of the P0171 code below. P0171 Definition: System Too Lean (Bank 1) Code type: Generic – P0171 indicates the same problem whether you’re having a Chevy, Ford, or Toyota, etc. Can I drive with the P0171 code? Yes, but you should not drive your vehicle for a long time. Is it easy to fix? Intermediate level. . Best dry food for puppies

P0171 and P0174 are diagnostic trouble codes for lean condition in bank 1 and bank 2, respectively. These codes indicate that the engine is receiving too much air or not enough fuel, resulting in a lean air/fuel mixture. The potential causes include a vacuum leak, faulty oxygen sensor, clogged fuel injectors, or a malfunctioning mass airflow ...P0171 code ford f150: meaning, symptoms, & fixesFord f series pickup p0171 p0174 lean condition codes Ford f150 pcv hose vacuum expedition 1998 valve 1999 elbow 4l heated 2001 v8 problem low exhaust 2000 p0174 assemblyTruck codes p0171 p0174 engine check light bought camper pull.Oct 19, 2023 ... This engine is used on the Ford Explorer, Flex, Taurus, Edge, F-150 and more.2004 - 2008 F150 - Code P0171 and Code P0022 - Hey all, No posts for long time, however in my 2004 F150 with 125,000 on the clock I was driving around and it started bucking and not running well. Shut her down, restarted and it was ok. Then I drove on a bit and it started again, threw a light.Fuel Injectors. P0171 indicates that your Ford Explorer is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171.Feb 13, 2011 ... I do need to pull & clean the IC, never been done I think, however the motor was replaced by Ford just under 50K miles. I doubt that they ...Sep 10, 2018 · P0171 indicates that your Ford Ecosport is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171. If you have one or more fuel injectors that have gone bad, that can ... Home Car Dealers Ford Brick, NJ. All Ford Dealers in Brick, NJ. 08723. Showing 25 results. CELEBRITY FORD OF TOMS RIVER (FORD) Visit Site. 360 Route 37 E. Toms River …How to fix a Ford P0174 engine code: Fuel Injection System Too Lean Bank 2A lean condition exists if the engine is getting more air than fuel in the cylinder...Re: P0304 p0171. bump, help this brother out! 2000 Ranger Sport EXT. Soundqubed HDS315, birch box tuned to 31 hz. 8in Aeroport. Pioneer DEH80PRS,Vifa Tweets, PRV Mid bass and mids. FSD FZ2600 and FZ85.4. So My truck has a Misfire on #4 and bank 1 combustion too Lean I changed My bank 1 sensor already and ill replace all plugs and …The 2023 Ford Escape is the latest model of the popular Ford Escape SUV. It was released in late 2022 and features a range of new features and upgrades. Here’s what you need to kno...The mass air flow sensor calculates the volume of air entering the engine. If it has gone bad, the air fuel mixture will be off and the P0174 and/or P0171 codes will show. It’ll be located between the air filter and the throttle body. It’s easy to find. It will have a wiring harness plugged into it.P0171 Ststem to Lean. The adaptive fule strategy continously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. Possible causes. Fuel system. Excessive fule pressure. Leaking/contaminated fuel injictors. Leaking fuel pressure regulator. Low fuel pressure or running out of fule. Ford codes P0171 and P0174 indicate a lean fuel mixture problem, typically caused by vacuum leaks or a faulty mass airflow sensor. To diagnose and fix these codes, you can start by inspecting the intake system for any cracks, loose connections, or disconnected hoses. Also, check the air filter and clean or replace it if necessary. Re: infamous ford P0171, P0174 ... Basic lean code testing first wants to identify if the problem is sealing or control. Very simple to distinguish between the ...Ford explorer 4.0l v6 sohc p0171 p0174 lean codes- common cause P0134: o2 sensor circuit no activity detected (bank 1, sensor 1) What would cause obd-ii error codes ...Fuel Injectors. P0171 indicates that your Ford Ranger is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171.May 22, 2023 · In this article, we’ll discuss the common causes of the P0171 code and provide some valuable tips and tricks to help you troubleshoot and get your Ford F-150 running again. We’ll also provide a table summarizing the most important aspects of this issue. Sep 10, 2018 · Fuel Injectors. P0171 indicates that your Ford Windstar is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171. P0133, p1131, and p0171. Alright I'm completely stuck. I bought my truck this past summer with the knowledge of a possible fuel pump issue. I replaced the pump assembly and fuel filter along with the plugs and wires and then put some seafoam in and cleaned the maf sensor as well. The previous owner said he replaced the o2 sensor, but …Taking a look at this escape with the p0171 and p0174, find a leaking fuel injector and change the seals.The P0171 code is a generic powertrain code that indicates a lean condition in the engine’s air-fuel mixture. In the context of a Ford Ranger, it specifically points to Bank 1 being too lean. This means that there is either too much air or insufficient fuel getting into the engine on the first bank of cylinders.Causes Of P0171 Code In Ford Vehicles. 1. Faulty Mass Airflow Sensor (MAF) The Mass Airflow Sensor measures the amount of air entering the engine to calculate the proper air-to-fuel mixture. If it’s giving incorrect readings, it can cause the engine to run lean.P0171 and P0174 are diagnostic trouble codes that indicate the engine has a lean fuel mixture. They are triggered by the upstream oxygen sensors on the engine bank 1 or 2. …P0171 indicates that your Dodge Ram is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171. If you have one or more fuel injectors that have gone bad, that can cause ...The P0171 and P0174 trouble codes indicate the lean running conditions. The P0171 trouble code triggers when PCM detects a lean condition in cylinder bank 1, while P0174 triggers when PCM detects a lean condition in cylinder bank 2. A lean condition occurs when your vehicle’s air-fuel mixture has too much air and insufficient fuel.Feb 12, 2017 ... It is unusual to have both a lean and rich trouble code at the same time. In this video, I will show you the steps involved to identify this ... El código P0171 Ford en español es bastante habitual en las camionetas y nos indica que el sistema es pobre. Es decir, se está dando una combustión incompleta con mezcla inadecuada de aire y combustible. Revisa todas las comprobaciones que te hemos indicado en este artículo para intentar solucionar el aviso de code P0171. When he put fuel in he car it would stumble and die, I show how to test purge solenoid and replace it1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks. Sponsored by: P0171, P0174 96 F-150 5.0. Reply Subscribe . Thread Tools ... The P0171 OBD-II code means that, on the first bank of the engine, the fuel system is running weak or a vacuum …If the P0171 is combined with the P0174 code, the problem is likely caused by an intake leak or the Intake Plenum Gasket and seals. If there are no intake leaks ...First, inspect your electrical system to determine if there’s an issue. Your powertrain control module or HO2S could be damaged, wiring connectors could be loose, or there could be water in the harness connector. Any …Jun 30, 2022 ... Share your videos with friends, family, and the world.System Lean. The code is thrown when the oxygen sensors detect the air-fuel mixture is “lean” (too much air or not enough fuel). The vehicle’s PCM will add more fuel to the mixture to bring the air-fuel mixture where it needs to be for optimal combustion. It also throws the code P0171 to let you know it has done this.Dec 18, 2019 ... Amazon Affiliate link below https://www.amazon.com/shop/influencer-16c863d5?ref=ac_inf_hm_vp http://www.milwaukeetool.com/ #flatratemaster ... If your vehicle was a full-size pickup, like the Ford F-150, expect that number to rise to $500. Fuel injector cleaning services can go for between $100 and $200. There may be other very specific (or common) issues that other motorists have experienced with your car. Just Google the codes followed by your car's make and model, for example: "P0171 and P0174 Ford Expedition." As one example, many report that a common cause of the P0171 and P0174 lean mixture fault in the BMW X3 is a faulty …P0171 / P0174. Jump to Latest Follow ... Ford Forum is a community to discuss all things Ford. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! Show Less . Full Forum Listing.Maintenance Shop - P0171 (Bank 1 lean), P0175 (Bank 2 rich) at sametime - Original problem was running rough and no power with codes P0301, P0306, P0305 & P0306. I changed out the ignition coil, and all plugs, verified wires good. Little to no change, still runs rough. I can pull a plug wire off cylinders 1 through 3...The P0171 code is a generic powertrain code that indicates a lean condition in the engine’s air-fuel mixture. In the context of a Ford Ranger, it specifically points to Bank 1 being too lean. This means that there is either too much air or insufficient fuel getting into the engine on the first bank of cylinders.The P1131 code indicates that the heated oxygen sensor contains a failure in the upstream flow. Therefore, Bank 1 is seen as running lean. P1131 is a manufacturer-specific trouble code that is routinely found with several Ford models. The ECM (Engine Control Module) receives data from the oxygen sensors in the vehicle.The P0171 code is a generic powertrain code that indicates a lean condition in the engine’s air-fuel mixture. In the context of a Ford Ranger, it specifically points to Bank 1 being too lean. This means that there is either too much air or insufficient fuel getting into the engine on the first bank of cylinders.Here’s a breakdown of effective troubleshooting steps for a P0171/P0174 trouble code: Check all vacuum hoses for leaks, including seals, lines, and hoses to ensure they are properly attached and connected. You can either listen for hissing sounds created by escaping air while the engine is running, or use a vacuum gauge if you have access to one.Symptoms: P0171 + P0174 Ford Edge. There aren’t always drivability issues associated with these codes. For most people the first sign that anything is wrong at all is the service engine soon light coming on. Here are the typical symptoms that something is wrong when your Edge has codes P0174 and P0171.1997 - 2003 Ford F150 - 02' 5.4L F150 Help with code P0171 - I've read all the threads on where to find the most common vacuum leaks and checked all the possibilities still not sure if I've pinpointed the problem? Yesterday, just when I thought I'd confirmed no vacuum leaks I heard my pcv valve making an extremely...Code P0174 Ford Tech Notes. If the P0174 is combined with the P0171 code, the problem is likely caused by an intake leak or the Intake Plenum Gasket and seals. If there are no intake leaks, the next step is to replace the air filter and clean the airflow meter. If the problem persists, the front oxygen (O2) sensor may need to be replaced.Nov 18, 2019 ... Thanks for the follow up! :cheer: Glad to hear it got fixed. Please Log in or Create an account to join the ...Ford cars come in all shapes and price ranges. See pictures and learn about the specs, features and history of Ford car models. Advertisement Ford models come in all shapes and pri...Sep 10, 2018 · Fuel Injectors. P0171 indicates that your Ford Explorer is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171. Depending on the engine type, the 2014 Ford F-150 truck has between 302 and 411 horsepower. According to the Ford website, the four engine types include the 3.7-liter four-valve V6...Learn what the code P0171 means for Ford vehicles and how to fix it with this helpful video. Expert tips and clear explanations in Spanish.Home Car Dealers Ford Brick, NJ. All Ford Dealers in Brick, NJ. 08723. Showing 25 results. CELEBRITY FORD OF TOMS RIVER (FORD) Visit Site. 360 Route 37 E. Toms River …Apr 13, 2019 · The most common causes of P0171 are a bad Oxygen sensor, a vacuum leak, or a dirty MAF sensor. Definition. P0171: Fuel Trim System Lean (Bank 1). Symptoms. Check engine light, decreased fuel economy, misfire, hard to find idle. Common Causes. Dirty MAF sensor, vacuum leak, O2 sensor. P0133, p1131, and p0171. Alright I'm completely stuck. I bought my truck this past summer with the knowledge of a possible fuel pump issue. I replaced the pump assembly and fuel filter along with the plugs and wires and then put some seafoam in and cleaned the maf sensor as well. The previous owner said he replaced the o2 sensor, but …The only way I can start my 01 f150 is to turn on the dome light. 1997 - 2003 Ford F150 - 2003 f150 4.6 p0171 - Hey Guys, I know there are a million posts on this, but I think I'm having a somewhat unique situation. I have a P0171 code, and no P0174. It sputters bad when driving, feels identical to a misfire which is what I figured it was until ...A 4 Cylinder has only Bank-1. Possible Causes of a Ford P0171 Code: Dirty Air Filter Mass Air Flow Sensor (Codes P0100, P0101, P0102, P0103, P0104) Clogged …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 …May 6, 2019 · Posted May 6, 2019. 2014 Fusion with 2.0L ecoboost. I occasionally receive the P0171 code (lean bank 1). It may go away for a month and then comes back. Using my odb2 reader, the sort term fuel trim is good but the long term fuel trim is high at idle. At idle it is typically 22 to 27. Under acceleration it appears to drop down a bit. The only way I can start my 01 f150 is to turn on the dome light. 1997 - 2003 Ford F150 - 2003 f150 4.6 p0171 - Hey Guys, I know there are a million posts on this, but I think I'm having a somewhat unique situation. I have a P0171 code, and no P0174. It sputters bad when driving, feels identical to a misfire which is what I figured it was until ...The P0171 and P0174 trouble codes indicate the lean running conditions. The P0171 trouble code triggers when PCM detects a lean condition in cylinder bank 1, while P0174 triggers when PCM detects a lean condition in cylinder bank 2. A lean condition occurs when your vehicle’s air-fuel mixture has too much air and insufficient fuel.P0171: význam, příčiny, opravy. Chybový kód P0171 indikuje, že směs paliva a vzduchu je příliš chudá. Může to být způsobeno vstupováním příliš velkého množství vzduchu do motoru nebo nedostatečným množstvím vstřikovaného paliva. Narušení procesu vstřikování se obvykle vyskytne vlivem těchto selhání:The P0171 code is a generic powertrain code that indicates a lean condition in the engine’s air-fuel mixture. In the context of a Ford Ranger, it specifically points to Bank 1 being too lean. This means that there is either too much air or insufficient fuel getting into the engine on the first bank of cylinders.Oct 2, 2023 · One of the most common causes of the P0171 engine code is a fuel system leak. When your fuel system leaks, more air and less fuel will enter the engine's cylinders. This results in your engine running lean because it can't get the necessary amount of fuel. Another problem with the fuel system is clogged fuel injectors. Welcome to Ford Ranger Forum Thread Tools: Search this Thread #1 11-23-2017, 08:30 PM louisvilleranger95. Ford Motor Co ... Posts: 161 p0171. 1995 4.0 4x4. i am getting a po171 code for lean on bank one. i have changed 02 sensors on both sides fuel filter and pump and had a shop check for vacuum leaks and found none. i have also …Sep 10, 2018 · Fuel Injectors. P0171 indicates that your Ford Explorer is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171. P0171 Ststem to Lean. The adaptive fule strategy continously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. Possible causes. Fuel system. Excessive fule pressure. Leaking/contaminated fuel injictors. Leaking fuel pressure regulator. Low fuel pressure or running out of fule.Nov 30, 2023 · The most common problems that trigger the P0171 fault code are: Bad MAF (mass airflow sensor) Bad injectors. Bad O2 sensors. Vacuum leak. A malfunctioning or bad PCM. Clogged fuel filter. Weak fuel pump. Bad fuel pressure regulator. =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈===== How to Fix P0171 =====Engine Code P0171 Saving Repair...Some common symptoms of code P0171 could include the following-. Stored trouble code and possibly an illuminated warning light. Several other codes relating to misfires and/or fuel pressure may be present. Depending on the application and the nature of the problem, varying degrees of power loss may be present.Sep 10, 2018 · Fuel Injectors. P0171 indicates that your Ford Explorer is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171. When he put fuel in he car it would stumble and die, I show how to test purge solenoid and replace itSep 10, 2018 · Fuel Injectors. P0171 indicates that your Ford Explorer is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171. Ford’s F-series of pickup trucks has been around for more than a century, and the model has been among the most popular vehicles for decades. The F-150 has been the best-selling tr... Causes Of P0171 Code In Ford Vehicles. 1. Faulty Mass Airflow Sensor (MAF) The Mass Airflow Sensor measures the amount of air entering the engine to calculate the proper air-to-fuel mixture. If it’s giving incorrect readings, it can cause the engine to run lean. The most common cause of the P0171 DTC is having an aftermarket intake that is not tuned for. Other common causes include vacuum leaks, exhaust leaks, a clogged fuel system (injector, pump, regulator), or faulty MAF, O2, or fuel pressure sensors. Most often it is an intake or vacuum leak causing the code.Sep 10, 2018 · Fuel Injectors. P0171 indicates that your Ford Explorer is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171. The P0171 code indicates a lean condition in the engine's fuel system, which can affect performance and emissions. Learn how to diagnose and fix this code with …P0171 and P0174 + fuel pressure. I'm trying to figure out the cause for these diagnostic codes. I've replaced the MAF, air, and fuel filters. My fuel pressure read 30 psi at idle, 38 with the vacuum hose removed from the fuel pressure regulator, and 38 at WOT. I got the same readings using both tanks. Although within specs this seems a little ...Symptoms: P0171 + P0174 Ford Expedition There aren’t always drivability issues associated with these codes. For most people the first sign that anything is wrong at all is the service engine soon light coming on. Here are the typical symptoms that something is wrong when your Expedition has codes P0174 and P0171.

The P0171 trouble code stands for System Too Lean (Bank 1) which means that the vehicle’s computer has detected insufficient fuel flow or increased oxygen flow in the first bank of the engine and both scenarios lead to ”lean condition”. ... Ford: Yes: $100 – $500: Fiat: Yes: $80 – $400: Peugeot: Yes: $100 – $500: What Repairs Can .... Radprimer

p0171 ford

HI Everyone: This is a 2001 Ford Expedition with a 4.6 liter engine, no complaints from the customer other than the check engine light is on. This video show...P0171 code ford f150: meaning, symptoms, & fixesFord f series pickup p0171 p0174 lean condition codes Ford f150 pcv hose vacuum expedition 1998 valve 1999 elbow 4l heated 2001 v8 problem low exhaust 2000 p0174 assemblyTruck codes p0171 p0174 engine check light bought camper pull.Symptoms: P0171 + P0174 Ford Expedition There aren’t always drivability issues associated with these codes. For most people the first sign that anything is wrong at all is the service engine soon light coming on. Here are the typical symptoms that something is wrong when your Expedition has codes P0174 and P0171.Symptoms: P0171 + P0174 Ford Explorer. There aren’t always drivability issues associated with these codes. For most people the first sign that anything is wrong at all is the service engine soon light coming on. Here are the typical symptoms that something is wrong when your Explorer has codes P0174 and P0171.P0174 ford f150 code obd p0171 x5 e53 source xoutpost resolved bmw Truck codes p0171 p0174 engine check light bou. P0356 ford f150 What are the causes for p0305 ford f150 and how to fix them? P0174 ford f150 code obd p0171 x5 e53 source xoutpost resolved bmw Truck codes p0171 p0174 engine check light bou. Fix Engine. Home;LIGHT TRUCK: 1997 AEROSTAR, RANGER 4.0L ENGINES ONLY. ISSUE: A rough idle, stalling at an idle and/or Diagnostic Trouble Codes (DTCs) P0171, P0174, P1131, and/or P1151 may be stored in memory on some vehicles with a 4.0L engine. This may be caused by the gasket located between the fuel rail and lower intake manifold …In Elon Musk-like fashion, Ford CEO Jim Farley made bullish claims about self-driving tech and said its next electric truck will drive itself. Jump to In Elon Musk-like fashion, Fo...P0016 ford mustang gtP0016 dtc I have 2019 ford mustang gt 5.0l, and dtc is p0300 i replaced theMustang p0174 p0171 codes owner engine. 2015 ford mustang gt (p0300) engine misfire. !!!!!!update!!!!!!! more2015 mustang gt p0308 p0301 misfire P0171 code: vacuum leak test on my 2007 mustang gt2000 ford mustang 3.5 with p0171 & …P0133, p1131, and p0171. Alright I'm completely stuck. I bought my truck this past summer with the knowledge of a possible fuel pump issue. I replaced the pump assembly and fuel filter along with the plugs and wires and then put some seafoam in and cleaned the maf sensor as well. The previous owner said he replaced the o2 sensor, but …Sep 10, 2018 · P0171 indicates that your Ford Expedition is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171. If you have one or more fuel injectors that have gone bad, that can ... P0171 / P0174. Jump to Latest Follow ... Ford Forum is a community to discuss all things Ford. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! Show Less . Full Forum Listing.Symptoms: P0171 + P0174 Ford Expedition There aren’t always drivability issues associated with these codes. For most people the first sign that anything is wrong at all is the service engine soon light coming on. Here are the typical symptoms that something is wrong when your Expedition has codes P0174 and P0171.Apr 13, 2019 · The most common causes of P0171 are a bad Oxygen sensor, a vacuum leak, or a dirty MAF sensor. Definition. P0171: Fuel Trim System Lean (Bank 1). Symptoms. Check engine light, decreased fuel economy, misfire, hard to find idle. Common Causes. Dirty MAF sensor, vacuum leak, O2 sensor. The Ford Taurus usually has three engine mounts--one mount each on the left and right sides of the front of the engine, and one mount for the rear of the engine and the transmissio...Fuel Injectors. P0171 indicates that your Ford Mustang is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171.What Does Code P0171 Mean For Your Ford? Causes Of P0171 Code In Ford Vehicles. 1. Faulty Mass Airflow Sensor (MAF) 2. Vacuum Leaks. 3. Faulty Fuel Injectors. 4. Bad …When dealing with a P0171 code, indicative of a lean fuel mixture in bank 1 of the engine, there are specific repairs that we can consider to resolve the problem. First, we must inspect the air filter and replace it if it is dirty or clogged. A clean air filter is essential for maintaining the correct air-to-fuel ratio.Fuel Injectors. P0171 indicates that your Ford Explorer is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171.Aug 12, 2010 ... The P0171 code means it's bank 1, which is the side that has cylinder #1. You could have an exhaust system leak, bad O2 sensor, intake manifold ....

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