Ford f150 p0171 code

I just replace the PCV valve in my 2003 F150 4.2l. I unplugged the battery for a few minutes and then re-attached it. Everything worked fine for a couple of weeks then the "maintance" light came on. Codes P0171 and P0174 are again the problem. I replaced not only the valve, but also the hose that attaches it to the valve cover (over $65 for both).

1. Use an OBD-II scanner to retrieve the trouble code. This will help identify the specific issue. 2. Code P0131 indicates a malfunction in the oxygen sensor bank 1 sensor 1. Inspect the wiring harness and connector for any damage or loose connections.Learn how to diagnose and fix the OBDII code P0171 Ford, which indicates a lean condition in the engine. Find the possible causes, symptoms and solutions on AutoCodes.com.Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content. Quick links. FAQ; F150 Forum. Engine / Transmission / Drivetrain. Non-EcoBoost V6 Engines - 4.2L (1997-2008), 3.7L (2011-newer) ... Codes came up P0171 and P0174. System Adaptive Fuel too lean on bank 1 and bank 2.Ford 4.6L, 5.4L. System Too Lean Bank 1. System Too Lean Bank 2. Vacuum Leak. Testing Codes: P0171, P0174. Fuel Trim Check. Ford 4.6L, 5.4L. Fuel Trim Check. Chronic Lean Condition. ... when you're troubleshooting a P0171 or a P0174 trouble code is that whatever is causing it, is making the PCM think that too much unmetered air is entering the ...Introducing the Battle Against the P0171 Code in Ford F150: In this exclusive article, we dive into the notorious P0171 code that has been haunting Ford F150 owners. As a Mechanics teacher, join us as we unravel the mysteries behind this engine trouble and explore the potential causes and solutions.1997 - 2003 Ford F150 - 1998 F150, P0171, P0174 codes, lean - I have a 1998 F150 4x4 Triton 5.4, automatic, AC, it has 110,000 miles. I have both O2 sensors triping P0171 and P0174, Fuel trim too lean bank 1 and same for bank 2. If I clear all codes using a reader both of the sensors/codes appear again at the same...

Descubre cuál es el código de falla P0171 Ford. Síntomas, causas y soluciones! ☝ - Sistema de inyección de combustible demasiado pobre en el banco 1. Motor (P) Red (U) Carrocería (B) Chasis (C) Por Marcas. ... P0660 2001 Ford F150 - Código DTC de falla OBD2. P1102 Ford - Código DTC de falla OBD2. P0476 Ford - Código DTC de falla OBD2.1987 - 1996 F150 - 1996 F150 4.9L System too Lean (P0171 & P0174) - Hey guys. I filled up my tank the other day, and noticed that the check engine light came on. I checked out the codes and saw that it read P0171 and P0174, which is system is too lean for Bank 1 and Bank 2.Diagnostic trouble code P0171 means System Too Lean (bank 1). That means the car computer noticed the engine is running lean. A lean system means the air-fuel ratio entering the combustion chamber is not what the engine wants. It means there is too much air or too little gas to balance the specified mixture ratio.2004 - 2008 Ford F150 - Extremely rough idle. Code P0303, P0306, P0171 - 2008 F-150 XL 2WD 4.2L with 43K miles. Truck idles and drives rough with following codes. Misfire cylinder 3 (P0303), misfire cylinder 6 (Po306), and lean code P0171. I had a misfire code last year and I replaced sparks and wires.runinning 28-30. Then your fuel PSI is low, yours should be: Engine running 28-50 psi. Key on engine off 35-45 psi. This could be due to a bad pump or a bad or leaking fuel regulator. Low PSI can set a P0171 lean code, so I would focus on solving this low pressure issue.

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.Got to work, tightened cap, disconnected battery to reset code. All is good. 4 days later, the CEL returns. OK, I dragged out the code reader and checked the code. P0171. Lean Bank 1. Truck was running good. No driveability issues. OK, purchased a can of CRC MAF cleaner, removed MAF and cleaned. Reset code, all is well. 4 days later …Ford F-150 / F-Series Generations. 1997 - 2003 Ford F-150. Looking for recent topics? 2001 F150 P0171 code. 3 posts • Page 1 of 1. raidersjake New Member Posts: 3 Joined: Sun Sep 16, 2018 8:32 pm Truck: 2001 F-150 XLT Supercrew. 2001 F150 P0171 code.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. It is running rough at...

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General F150 Discussion - P0171 & P0174 Codes - 2002 f150 with both codes showing so obvioulsy its both banks. Usually MAF or fuel filter. Not showing any MAF signes fo think its fuel - sound logic? tx ... General F150 Discussion General Ford F150 truck discussions and questions. Sponsored by: P0171 & P0174 Codes. Reply Subscribe . Thread Tools ...The codes is usually set when there is an intake leak after the air flow meter, before replacing any parts check for loose or broken hoses and intake gasket leak. On Ford some models dirty air filter, and dirty or faulty air flow sensor are the cause of the problem. 2004 FORD F150 P0171, P0174, P0301, Misfire and Lean Condition.The P0507 code is related to your Ford F150's idle air control system. The idle air control valve (IAC) plays a crucial role in maintaining a smooth idle by regulating the amount of air entering the engine. It's essential to maintain your F150's idle air control system to optimize engine performance and fuel efficiency.2004 - 2008 Ford F150 - '05 4.2L Woes - P0171 P0302 - Tonight on the drive home, the truck started bucking pretty bad and threw a CEL. Checking with my very basic scanner gave me P0171 (Lean Condition Bank 1) and P0302 (Cylinder #2 Misfire). I've had some sort of exhaust leak for the past few weeks (can smell exhaust...2004 - 2008 Ford F150 - Camshaft/Timing Errors: P0022,P0011, P0021, P0340, P0345, P0171 - Hello All, I have a 2004 F150 FX4 5.4L. I noticed some shaking, and a check engine light. ... They popped back up again with a new one, P0171. Here's the code descriptions: P0022 - Intake camshaft position timing - over-retarded bank 2 P0011 - Intake ...

Jul 20, 2022 · To diagnose the P0171 1997 Ford F150 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour. You are here: Ford F150 Home » F150 Forum. Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content. Quick links. FAQ; F150 Forum. ... code P0171. 6 posts • Page 1 of 1. txford09 Regular Member Posts: 92 Joined: Sun Mar 09, 2008 2:42 pm Location: Nederland, TX. code P0171.1997 - 2003 F150 - P0175 and P0171 codes - I am getting codes P0171 and P0175 on a 2002 F-150 4.2. I have cleaned the MAF and filter, replaced the elbows on the PCV assy and checked for vacuum leaks but couldnt find anything. The truck runs a little rough at idle but doesnt seem to lack any power. It is also hard to...Maintenance Shop - 2000 F150 4.2 v6, no start, P0171& P0174 codes - 2000F150, 4.2 v6, 5sp, 2wd, 141,000mi, one owner, never wrecked, fuel at 3/4. Codes P0171 & P0174 are 'System too lean' codes for Bank 1 & 2. The first thing I'll check after work is the fuse for the fuel pump. But no troubleshooting has been done yet...In order to diagnose a P0171 code in your Ford vehicle, you will need an OBD-II scanner to retrieve the code. This code typically indicates a lean condition, meaning there is too much air and not enough fuel in the air-fuel mixture. Some common causes of a P0171 code include a vacuum leak, a faulty oxygen sensor, or a dirty mass airflow sensor.P0171. by projectsho89 » Sun Mar 06, 2011 3:12 pm. davemx wrote: no your injectors should be fine it might be your o2 sensors. O2 sensors will NOT cause "lean" or "rich" codes! Check for vacuum leaks, dirty MAF sensors, restricted/weak fuel supplies, exhaust leaks adjacent to the upstream O2 sensors, etc.Here is a breakdown of the oxygen sensors for the Ford F150, 5.4 engine. I will assume that most 5.4 Ford engine have the same breakdown. Please subscribe as...Last edited by Liborius von Ditfurth; 08-20-2023 at 03:22 AM. 1997-2006 Expedition & Navigator - P0175 Code on a 5.4 Triton - Hello everyone, recently my '04 Expedition decided to throw me a Service Engine Soon light, when I scanned for stored codes it only gave me a P0175 code indicating a rich condition on Bank 2.=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈===== How to Fix P0171 =====Engine Code P0171 Saving Repair...

1997-2006 Expedition & Navigator - P0171 only on 03 5.4 - I'm getting only code P0171 on my 2003 5.4 Expy, any ideas? I thought if it was a vacuum leak I would get P0171 & P0174. The truck is still running and idling fine and fuel economy seems unchanged, I actually reset the code and it was off for about a week - now...

1997 - 2003 F150 - 03 F150 5.4L P0171 P0174 code - I have about 45,000 miles on my 03 gas only 5.4L which just started acting up. (Sits around in the garage because I'm retired. Drive it two times a week about 8 Miles only). Replaced DPFE, EGR, EVR, PCV already and inspected the PCV Elbow and hasn't fixed it yet. I...How to determine the cause of a lean condition on a Ford 5.4 engine. How to locate a vacuum leak without a smoke machine.For more information on this topic, ...The computer now shows codes P0172 and P0174 which means the Bank 1 is rich and the bank 2 is lean. The O2 sensors are working and moving around. The back 02 sensors are both reading in the 0.8Volt range but bouncing around. The front 02 sensors are both moving from 0.1 to 0.8 constantly.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. ... Ford F150: P0171 and P0174 Diagnosis. Ford F350: P0171 and P0174 Diagnosis. Jason on Mazda 6 P0320: Meaning ...1998 Ford F150 Triton V8 with P0171 and P0174 lean codes that has had every part thrown at it and even the repair shop can't figure it out...But maybe a DIY ...1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.If you’re in the market for a Ford F150, you’re in luck. This popular truck is known for its durability, versatility, and impressive performance. Whether you need a powerful workho...

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Code P0171 2008 Ford F150 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 persists the front oxygen (O2) sensor may need to be replaced.P0171 code definition System Too Lean (Bank 1) What the P0171 code means The P0171 OBD-II code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. ... Ford Escort L4-2.0L - Check Engine Light is on - Nashville, Tennessee Brandon showed up ahead of schedule, was very ... The most common cause of the P0171 code – and the P0170 and P0173-P0174 codes – is unmetered air entering the combustion system. Most of the time, this happens due to faulty or dirty mass ... Ignition misfiring. Faulty fuel injectors. Exhaust gas leaks. Incorrect fuel pressure. Lack of fuel. Faulty Positive Crankcase Ventilation (PCV) Faulty Mass Air Flow (MAF) sensor. …Oxygen Sensor – The P0175 code is thrown when the B2S1 O2 sensor does not register the right amount of oxygen in the exhaust. The computer will still adjust the air/fuel mixture to compensate. A bad O2 sensor will show a lean mixture more often, though. Mass Air Flow Sensor – Your F150’s mass air flow sensor calculates the volume …Once the oil has been changed in a Ford F150, if the oil change indicator light on the dash does not reset on its own, then the light should be manually turned off by resetting the...1997 - 2003 F150 - P0171 Code - Hi, I have a 99 F-150 with about 150,000 miles on it. I am getting a P0171 code from my OBD II port. I had it checked at AutoZone. ... Ford F150 - P0171 & P0174 Codes. My F150 check engine light came on and I was able to use a code key to find out the problem codes. P0171 & P0174. There are articles online …My 1997 4.0L ohv engine had the P0171,P0174 codes for quite some time....as well as overheating issues. My son drives this vehicle and it's due for a smog check for reg renewal....and he needs a reliable car. ... 0171, 0174, 2000, 2001, code, codes, error, explorer, f150, ford, p0171, p0174, ranger, sport, trac. Back to Subforum. Explorer ...1997 - 2003 Ford F150 - 2001 f150 4.2l w/ codes p0171-p0174 - I just bought this truck 2weeks ago and the damn check engine light just came on with these codes; P0171-P0174. I had a Ford tech on yahoo answers tell me its probably the upper intake gasket. Could anyone tell me more about these codes before I tear my...How to determine the cause of a lean condition on a Ford 5.4 engine. How to locate a vacuum leak without a smoke machine.For more information on this topic, ... ….

1997 - 2003 F150 - P0171 Code - Hi, I have a 99 F-150 with about 150,000 miles on it. I am getting a P0171 code from my OBD II port. I had it checked at AutoZone. ... Ford F150 - P0171 & P0174 Codes. My F150 check engine light came on and I was able to use a code key to find out the problem codes. P0171 & P0174. There are articles online …1997 - 2003 Ford F150 - P0171 Code Cost vs Value - After spending $1600 on my 1999 F-150 4.2L V6 Can't keep this code (P0171) from reappearing. To date have replace both O2 sensors. MAF sensor, intake manifold, fuel filter, fuel pump and sending unit. Any suggestions on what to focus on next?In this exciting episode, join us as we dive into the diagnostic journey of a 2003 Ford F-150 4.6L that came into the shop with the pesky P0171 and P0175 Dia...1997 - 2003 Ford F150 - p0171, p0302 - Trying to figure this one out. I know 0171 is lean on bank one, and 0302 is a misfire on cylinder 2. Replaced spark plug and coil pack on cylinder 2. 2002 f150 5.4 240k miles Engine runs nice and smooth most of the time, but when the code pops up will stumble at an idle, and just...1997 - 2003 F150 - 97 5.4 F150 codes P0171 and P0174 - Seems like I have a problem common to a lot of others. It started out with a cel and code P0171. I cleared the code and ran it for a couple of days and the cel comes on again half way home from work.1987 - 1996 F150 - P0401 and P0171 Codes Suddenly - So I've got a 1996 F150 5.8L with 193,000 miles on it. When I bought it, it had the P0401 code popping up. ... Talk about your 8th and 9th generation Ford F150 trucks. P0401 and P0171 Codes Suddenly. Reply Subscribe . Thread Tools Search this Thread 11-17-2016, 07:47 PM ...Code Reader shows P0171 and P0174 (Lean on Banks 1 and 2). When the engine gets extremely hot, or has ran for a long time and is shut off, then restarted, it misses and runs like crap for a few seconds, then runs smooth (this happens very rarely, unless I'm driving through a desert or somesuch). 1.P0171 and P0174. Hey guys my dad has a 96 F150 XL with a 300 6cyl. has lean codes PO171 (lean bank one) and P0174 (lean bank two). When cold, it cranks just fine and runs just fine but when its be ran for a while it hard as hell to start...it staggers and knocks real hard. Dad has to press the gas pedal to get it to straighten up after a few ...2004 - 2008 Ford F150 - Need help 04 f150 5.4 4x4 with P0174 code - Hello, as stated above I have a 04 f150 5.4 and I am getting a p0174 code with slight misfire and major loss of power. I need help diagnosing this so I can fix it properly. Low on funds so I can't have a mech look at it. Ford f150 p0171 code, 1997 - 2003 F150 - 02 F150 - 5.4 - P0171/P0174 - So just bought this truck about a month an a half ago. No problems but the other day the SES came on. It is showing P0171 and P0174. And P0000 (almost forgot that one) was told that's generic though. Haven't really noticed a difference in the way it's running., About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ..., 1997 - 2003 F150 - p0171, p0174, & p0420 - 2002 f-150 5.4., 186000mi I'm getting codes p0171, p0174 &p0420. The truck runs fine, I haven't noticed any problems other than the CEL. I started last winter with P0171 and P0174 only when very cold air temp. No codes until middle of summer, then started getting just the..., Maintenance Shop - P0171 and P0174 wont go away. - 2005 f150 5.4 with 130,000 miles. I have p0171 a d p0174 lean codes. I have tried everything I can think of and nothing fixes it. We have tested the injectors ran 44k thru the system, tested o2 sensors, replaced to maf 3 times now, smoke checked for vaccum leak,..., 496. 52K views 5 years ago. In this video I discuss common causes associated with Ford F series trucks experiencing a rough idle condition and/or codes …, 2004 - 2008 Ford F150 - HELP!!!! 04 FX4 5.4L 3v Codes, P0171, P0303, P0316 - Ok, 5.4L 3v owners and or mechanics I am at a complete loss!! I have a 04 FX4 and recently did the plugs (zero broke!!) and all 8 COP (summit racing brand) truck has 138k and and 2 days ago it started sputtering in overdrive on the highway..., To diagnose the P1537 Ford code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., Codes P0171/P0174. by CB3 » Fri Jan 19, 2007 2:55 pm. I have a 2001 F150 4.2L V6 w/ about 85K miles. Took it to the Ford place to have brake work done and diagnose the "Check Engine Soon" light. Was told I need to replace the upper and lower intake gaskets (codes P0171/P0174 - system lean banks 1 & 2) along with the PCV valve., 2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck. 2006 4.6 p0171 and p0174. Reply Subscribe . Thread Tools ... code P0171 is triggered. P0171 Causes. Dirty or faulty mass air flow sensor; Vacuum leaks – PCV hose, vacuum hoses, intake manifold gasket. Weak fuel pump; Clogged or dirty fuel injectors; …, 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 ..., Ford Factory Service Bulletin OBDII Code P0171 2004 FORD F150 P0171, P0174, P0301, Misfire, and Lean Condition. ... P0171 Ford Code - Fuel Injection System Too Lean Bank 1. How to Fix. Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent ..., Tools needed for diagnosing advanced P0171 code causes: OBD II scanner or code reader. Carburetor or throttle body cleaner. 1. Disconnected or Leaking Hoses. Air Intake Hose: Find the air intake hose that connects to the engine. Grab and shake it so you can feel if anything is loose., Ford F-150 / F-Series Generations. 1997 - 2003 Ford F-150. If you shop at Amazon.com (for anything), use this link to help support FordF150.net! Looking for recent topics? P0171 code again !! 2003 Harley F150. 5 posts • Page 1 of 1. ... darn code P0171 is back again changed both, May 5, 2017 · Come along as we look into why this 2004 Ford F-150 is setting a P0174 Bank 2 lean.These are the Tools and Parts Needed for this repair:Latest Ford Mass Air ... , Here is a breakdown of the oxygen sensors for the Ford F150, 5.4 engine. I will assume that most 5.4 Ford engine have the same breakdown. Please subscribe as..., 1997 - 2003 F150 - 03 F150 5.4L P0171 P0174 code - I have about 45,000 miles on my 03 gas only 5.4L which just started acting up. (Sits around in the garage because I'm retired. Drive it two times a week about 8 Miles only). Replaced DPFE, EGR, EVR, PCV already and inspected the PCV Elbow and hasn't fixed it yet. I..., 1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck., What does this mean? 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 …, Introducing the Article: “Cracking the Mystery of the 2004 Ford F150 P0171 Code” If you’ve ever experienced the frustrating P0171 code on your 2004 Ford..., Rivian's stock price fell more than 17% Monday, a drop prompted by a CNBC report that Ford was selling 8 million shares of the EV automaker. Rivian’s stock price fell more than 17%..., Introducing the Article: “Cracking the Mystery of the 2004 Ford F150 P0171 Code” If you’ve ever experienced the frustrating P0171 code on your 2004 Ford..., Oxygen Sensor – The P0175 code is thrown when the B2S1 O2 sensor does not register the right amount of oxygen in the exhaust. The computer will still adjust the air/fuel mixture to compensate. A bad O2 sensor will show a lean mixture more often, though. Mass Air Flow Sensor – Your F150’s mass air flow sensor calculates the volume of air ..., Oct 9, 2018 · One of the most common trouble codes with the Ford F150 is P0174. It indicates that your Ford F150 is running lean on the bank two side of the engine. P0174 and P0171 (fuel trim lean bank one) are the most frequently seen air/fuel mixture-related codes. If they appear together, it reduces the list of , Seems like it's running fine ,but cannot get anyone to figure out the 172 code rich bank 1 . Had trim codes recalibrated and updated engine computer . 3 times the ... 1997 Ford f-150 codes P0171 & P0174 I have a Ford F-150, 4.2L, V6, with about 141,000 miles on it. I replaced the sparks plugs and wires because it had not been done in a year and ... , 1 / 1. 3.8 & 4.2L V6 - 98 F150 4.2L P0171 code - Have 4,2L with 125,000 miles. Check engine light is on with a P0171 code. When I first scanned the OBD2 there was two codes P0171 and P0174 codes. Changed spark plugs and wires along with a ETC sensor. Cleared codes and drove it few miles, light came back on and P0171 came up...., I have a lean code on my 2005 f150 ford. replaced fuel filter, air filter, MAF sensor, and the bank 1 sensor 1 oxygen - Answered by a verified Ford Mechanic. ... hello, i have used an obd II scanner on my 2002 ford f150 and deleted two codes P0171 and p0174., The P1506 code means that the engine idle is out of factory specification. Sometimes the Idle Air Control (IAC) may have carbon built up. Disconnect the car battery, remove the valve, clean, re-install valve, and drive the vehicle for about 5 minutes with the headlights and A/C ON to get the idle relearned. Also, check for intake leaks or stuck ..., Oct 1, 2010 · 1997 - 2003 F150 - P0175 and P0171 codes - I am getting codes P0171 and P0175 on a 2002 F-150 4.2. I have cleaned the MAF and filter, replaced the elbows on the PCV assy and checked for vacuum leaks but couldnt find anything. The truck runs a little rough at idle but doesnt seem to lack any power. It is also hard to... , These codes can indicate various problems, such as issues with the engine, emissions, fuel system, ignition, and more. Some common check engine light codes for Ford F150 include P0171 (System Too Lean), P0401 (Exhaust Gas Recirculation Flow Insufficient Detected), P0420 (Catalyst System Efficiency Below Threshold), and P0300 (Random/Multiple ..., 1997 - 2003 F150 - P0171 & P0174 on 4.2L V6 - Trouble code P0171 & P0174 on a 2003 F-150 with 4.2L V6. I have cleaned the MAF, changed the fuel filter, looked for vacuum leaks, checked for vacuum leaks with the MAF cleaner (flammable), checked every thread on this forum, had the check engine light reset several times...., Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content. Quick links. FAQ; F150 Forum. Engine / Transmission / Drivetrain. ... 1997 F150 XL 4.6L (6 code engine) P0171 - Running Lean P0303 - Misfire in cylinder # 3 I read through tons of forums, not just ford150.net, to determine how to fix this because I was ..., by johnnyg768 » Wed Aug 18, 2010 4:05 am. So I have an 03 F150 Supercrew with a 4.6L. It has been throwing P0175 (bank 2 rich) and P0171 (bank 1 lean). The dealer is blaming my K&N intake, which was on and running fine for 2 years previous to this issue. Below are average readouts from an approximately 10 minute run., In this video, I fixed the source of the P0171 code on my 2001 Ford F-150. This code means the O2 sensors detected a lean fuel condition in bank 1 of the eng...