Ford f150 p0171 code

Apr 29, 2016 ... This is a Ford Expedition 5.4 with a vacuum leak causing "System Too Lean" trouble codes P0171 and P0174. In this video I will show you how ...

well i stumbled across your discussion by serchiing for answers to the same problem, my problem started after i had the head gaskets,valve c gaskets,intake gasket and exhaust man. gaskets replaced. drove it home and the dreaded p0171 and 0174 codes came up. since then i replaced both up stream 02s,fuel filter ,air filter, cleaned throttle …Maintenance Shop - P0125/P0171/P0174 codes all at once - I have the P0125/P0171/P0174 codes being thrown at the same time. ... Maintenance Shop Keep your Ford F150 truck running strong. Discuss all things maintenance here. P0125/P0171/P0174 codes all at once. Reply Subscribe . Thread Tools Search this Thread 01-30-2011, 10:15 PM ...How I fixed my P0171 and P0174 trouble codes on a 2003 Ford F150.1997 - 2003 Ford F150 - 2001 5.4 P0171 & P0174 Fixed - Hello, I have been a long time lurker and finally had something constructive to post. I have had lean codes P0171 & P0174 for a few years and finally did something about it. I suspected all along that the cause was the intake manifold gaskets. The thought of...2004 - 2008 Ford F150 - 2006 4.6 p0171 and p0174 - Hey guys on my 2006 4.6 4x4 140k I'm getting a p0171 and p0174 on and off on start up. Most days they are just pending codes (no MIL) but the other day I started her up (she was already warm) and the MIL came on for both codes. I cleared them, drove 2 hours home, and...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 fast rattling/ticking noise while engine running.Apr 29, 2016 ... This is a Ford Expedition 5.4 with a vacuum leak causing "System Too Lean" trouble codes P0171 and P0174. In this video I will show you how ...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....

General F150 Discussion - P0171 & P0174 Lean Codes 4.6 F150 - I have a 2006 F150 Super Crew that has 187,000 mile on it. I bought the truck with 3 miles on it, so I know the history of the truck. Off and on, for the last year, I have had an engine light come on. Codes started out as P0171, then P0174, then both codes...Definition Of P0171 Ford F150. The p0171 is an engine code that can be obtained by scanning using an ODBII scanner. It is not necessarily exclusive to the Ford …1997 - 2003 F150 - 2001 F-150 idling rough. P1131, P1151, P0171, P0174 - a friend of mine's 02 f-150 starting idling bad and he said the check engine light came on like 7 months ago so i checked the codes and came up with P1131, P1151, P0171, P0174. this says that the truck is running too lean, but what i'm wondering...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 I pulled the code (is it possible this...If your Ford F150 has the P0304 trouble code, you should know that it's about as common of a code as there is. It's a generic OBD IIcode (same meaning for all vehicles) that indicates that your truck's fourth cylinder is misfiring. ... When your F150 has P0304 and P0171 together, it's often caused by a clogged or underperforming fuel ...Mar 27, 2014 ... showing how the mass airflow sensor will mess up your barometric pressure calculation and cause these lean codes (under load)...p0171 ...

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.Vacuum leaks, coils/plugs misfiring, burned valves, etc can ALL set an O2 lean code. The trick is figuring out which one or more is causing it. Maintenance Shop - 2001 f150 5.4l codes p0171 and p0174 HELP!!! - the truck runs fine sometimes but seems to be getting worse. It has died a couple times at stop signs.1997 - 2003 Ford F150 - The Dreadful P0171 & P0174 Error Code - After tons of searching I would like to make a sticky. My truck is a 99 lariat 4x4 5.4 v8 2 valve.Feb 21, 2022 · 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. Diagnosis: It is important to complete the entire diagnostic ... 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, ...

Costco flavoured water.

1. Age. 63. Nov 24, 2017. #1. While DTC code P0171 and its closely related cousin, P0174, are two of the most common codes to afflict Ford F150 models, almost all Ford models are equally likely to suffer the effects of these codes at some point, and particularly Ford applications that have done more than about 60 000 miles or so.The most common cause for the type of problem on the lean codes P0171 and P0174 is in most cases caused by a vacuum leak due to a rotted out hose and or a leaking intake manifold. Start with making sure the fuel pressure is with in spec and check in and around the intake for signs of leaking vacuum, take a close look at the PCV supply line as ...Labor: 1.0. 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.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.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).The code that is appearing is of course the dreaded P0171 and P0174. Here is what I have done so far. 1. Visually checked for vacum leak(s), and replaced PCV Valve and hoses. ... Is it possible this extra air flow from the CAT filament gone could cause a too lean code P0171 and P0174 to be issued by the Computer? I thought it was strange that ...

Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content. Quick links. FAQ; F150 Forum. Engine / Transmission / Drivetrain. All Other Engines - 4 cyl (Ranger), 300 I-6, etc. ... OBDII code P0171. Post by Epistuff » Fri Nov 03, 2006 12:01 am.The 1957-1958 Ford Ranchero and Courier pickups were pioneering designs. See pictures and learn about the 1957-1958 Ford Ranchero and Courier. Advertisement The 1957-1958 Ford Ranc...Ford F-150 / F-Series Generations. 1997 - 2003 Ford F-150. Looking for recent topics? F150 Codes P0171 / P0174 Information. 58 posts 1; 2; 3; Next; 3FOX Hardcore Ford Truck Fanatic Posts: 3868 Joined: Mon Oct 22, 2012 2:53 am Truck: 02 F150 SCREW. F150 Codes P0171 / P0174 Information.98 F150 4.6L V8 120,000 miles Ok, I had this code pulled from Autozone (only one) after my CEL came on. This same code occurred about 5 months ago.....Cleaned the MAF first time via some excellent instructions found here but didn't help. Replacing the O2 sensor cleared it until about a week ago.Aug 21, 2023 ... How to fix a Ford P0174 engine code: Fuel Injection System Too Lean Bank 2 A lean condition exists if the engine is getting more air than ...Ford F150 FX4: 2004 F150 5.4 Codes P0022 Camshaft Position 2004 F150 5.4 Codes P0022 Camshaft Position Timing Over Retarded Bank 2 - P0171 Bank 1 Too Lean - P0175 Bank 2 Too Rich. Rough idle, low on power. Learn how to fix the P0171 Ford code that causes poor work of the gas pedal. Find out the causes, symptoms, and solutions for this common problem. 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 ...Problem codes P0171 and P0174 on a 99 ford f150. Truck is surging while at idle and driving, replaced fuel pump, fuel tank pressure sensor, fuel filter, PCV valve, cleaned the MAF sensor, EGR valve an … read more

P0171 indicates that your Ford F150 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 E40D and 4R100 codes are for gas and diesel for 1996 - 2003 E and F-series Super Duty (250 350 450 550). In 2004 they changed to a 5R110 transmission and the codes are different. ... Ford F-150 Lightning Purchase Turns Into a Nightmare for Owner. Slideshow: Luckily, the automaker was willing to help. Read It. Top 10 WORST Excuses to NOT ...Feb 17, 2007 · 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.... 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 2.2004 - 2008 Ford F150 - 2006 4.6 p0171 and p0174 - Hey guys on my 2006 4.6 4x4 140k I'm getting a p0171 and p0174 on and off on start up. Most days they are just pending codes (no MIL) but the other day I started her up (she was already warm) and the MIL came on for both codes. I cleared them, drove 2 hours home, and...What does the P0171 code mean in a 2004 Ford F150? In a 2004 Ford F150, the P0171 code indicates that there is a lean condition in bank 1 of the engine’s fuel …The P0172 code can mean many things depending on how your vehicle is set up. Your car might be displaying several symptoms, such as high pressure in the fuel rail or system, idle problems, black smoke coming from the exhaust, or other problems that may require the assistance of a mechanic. Troubleshooting P0172 on the Ford F1502006 F150 4.2l scan codes present P0171, - Answered by a verified Ford Mechanic. ... i have a 1997 ford f-150 i keep getting a code for cylinder 2 misire and system to lean . i have changed the plugs wires and coil pack , also fuel filter .. if any suggestions please let me know ...

Logan airport how early to arrive.

Full service truck stops near me.

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.F150 Codes P0171 / P0174 Information. by 3FOX » Tue Aug 05, 2014 5:11 am. On all trucks with well over 50,000 miles, sooner or later these codes will appear. In 99% of the cases it is an air leak into the intake of unaccounted for air.What are the Possible Causes of the DTC P1152 Ford? NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. Faulty Upstream Oxygen Sensor Bank 2. Fuel pressure high or low. MAF sensor dirty/defective.1997 F150 XL 4.6L (6 code engine) P0171 - Running Lean P0303 - Misfire in cylinder # 3 I read through tons of forums, not just F150forum.com, to determine how to fix ...Re: '05 4.6L F-150 Missing P0171 P0301. by 3FOX » Sat Dec 17, 2016 12:04 am. The 301 code is a secondary side ignition failure. Since you swapped coils, it leaves the spark plug or cylinder fault. The 171 code for that bank can be the OX sensor is detecting the un-combusted air from that cylinder that has shifted bank 1 fuel table and set the ...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. …2004 - 2008 Ford F150 - 2004 F150 5.4 P0171 and P0174 codes - Hi. New to the forum. My beloved truck is giving me fits. Was pulling away from the pump the other day and the truck stalls. My buddy swears he hears something blow out under the hood. I get the thing restarted and I get a check engine light.To diagnose the P0171 2008 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. ….

Last edited by Coleroad; 06-08-2023 at 10:30 AM. 1997 - 2003 Ford F150 - Another 03 4.2 P0171 P0174 thread - Long and short - 03 4.2 with the P0171 and P0174 codes. I changed the isolator bolts two years back and the IMRC bushings. DPFE valve, IAC valve, EGR valve, PCV valve, all 02 sensors, and MAF have all been replaced in the last two years ...This 2004 F-150 has leaned codes P0171 and P0174. Having both codes indicates that whatever is causing these lean codes is affecting both sides of the engine...I'm a DIY but have some knowledge, skill and experience when it come to working on modern (1985 - present) vehicles. Problem: 1999 Ford F150 truck, 2WD, 5.4L engine. The OBD II system has captured the dreaded P0171 and P0174 codes. "System adaptive fuel to lean" Bank 1 and Bank 2. I have replaced the fuel filter, air filter.The most common cause for the type of problem on the lean codes P0171 and P0174 is in most cases caused by a vacuum leak due to a rotted out hose and or a leaking intake manifold. Start with making sure the fuel pressure is with in spec and check in and around the intake for signs of leaking vacuum, take a close look at the PCV supply line as ...I have a 2001 Ford F150 with v8 engine the 5.4 to be exact. Truck has over 220,000 miles on it. I just got it back from a routine oil change a couple days ago and it came back with the following codes: P1405 EGR upstream homes unplugged P0171 System to lean Bank 1 P0174 System to lean Bank 2Just 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 DISA valve. How to Read Your OBDII Computer Codes. Read this tutorial on how to use one particular OBDII …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) ... i kept getting the p0171 code and replaced my sensors and havnt gotten that code again, but with yours being both bank 1 and 2 ...0174, 2006, 54, code, f250, ford, freestyle, liter, p0171, p0174, po174, trips, truch, truck, xlt. 1997 - 2003 F150 - P0174 Code - I go to Advance Auto to have the service engine soon light checked and it coded P0174, bank 2 too lean I believe. Let it go a day or two and on the way to work I stopped at the store. When I came out, nothing!p0401 egr flow insufficient. p0171 system to lean ( bank 1 ). p0174 system to lean ( bank 2 ). common problems that trigger p0401--. Restriction in the EGR passages, usually caused by carbon buildup. The EGR Valve is defective. Lack of proper vacuum or electrical signal to the EGR valve. Ford f150 p0171 code, 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 ..., DTC codes P0171 & P0174. I've had DTC P0171 & P0174 (lean in bank 1 and lean in bank 2) for a few weeks now (check engine light cued me on it). Autozone scanned it for me. It's on a 2003 F250 SD 4x4 5.4L. My first step was to clean the MAFS. Light came back on in about 30-40 miles. I then replaced the MAFS. 30-40 miles and the light came back on., 2002 ford f150: scanner..deleted two codes p0171 and p0174..sensors. hello, i have used an obd II scanner on my 2002 ford f150 and deleted two codes P0171 and p0174. I went to smog check it and they said I have to drive it certain amount of time so some of the sensors ..., General F150 Discussion - P0420 and P0171 codes. - I was gifted a 2006 F150xl from my parents. The truck sat for some time because my father wasn't driving. ... General F150 Discussion General Ford F150 truck discussions and questions. Sponsored by: P0420 and P0171 codes. Reply Subscribe . Thread Tools Search this Thread 12-10-2023, 08:57 AM ..., Jul 10, 2021 · By Vlad Samarin, Updated: July 10, 2021. The OBDII trouble code P0171 - System Too Lean (Bank 1) means that the engine air-fuel mixture is too lean, or there is too much air and too little fuel. Driving a car with the code P0171 can cause more damage to the engine over time, as when the engine runs lean, the combustion temperature is higher. , 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! ... Cleared that fault code. P0171/0174 came back. I have doused everything in carb cleaner and had ZERO throttle/idle surging., Thread Starter. 1997 - 2003 F150 - Dreaded P0171 & P0174...but only when cold! - So I recently bought my 2001 F150 4.2L Std cab, 2wd, 168k miles on it., the check engine light was lit up at time of purchase. I replaced the DPFE Sensor, and that solved that code. However, I still have the dual lean condition, P0171 & 0174, but only..., Jul 23, 2023 · 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, the next step is to replace the air filter and clean the airflow meter. , , 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..., 2004 - 2008 Ford F150 - rough idle, p0171, 0174 - Hey, I'm new to the site, and have done an extensive search for help with my problem, but none of the results are quite the same as my problem. I have an '04 F-150 with the 5.4l and am getting codes p0171, p0174, p2195, p2197. I read out the meaning of all of them and..., Code P0171 indicates Bank 1 of the engine has a lean fuel mixture. P0174 indicates Bank 2 of the engine has a lean fuel mixture. Engine Bank 1 is the same side of the engine as Engine Cylinder 1. Engine Bank 2 is the opposite side of the engine., Don : ok p0171 and p0174 are lean codes with having both codes I would look for a vacuum leak or the exhaust leaking close to the engine. code p0385 is a little harder. it is a circuit or pcm fault. with the misfire detection part of the pcm. you need to check the wires from the ignition control module to the pcm if the wires are good the pcm ..., 1997 - 2003 Ford F150 - 2001 5.4 P0171 & P0174 Fixed - Hello, I have been a long time lurker and finally had something constructive to post. I have had lean codes P0171 & P0174 for a few years and finally did something about it. I suspected all along that the cause was the intake manifold gaskets. The thought of..., Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content. Quick links. FAQ; F150 Forum. Engine / Transmission / Drivetrain. Modular/Triton V8 Engines: 4.6L, 5.4L (97-10) Looking for recent topics? P0171 Code on 2001 4.6L... 3 posts • Page 1 of 1. pigman New Member Posts: 2 Joined: Thu Feb 12, 2004 6:59 am. P0171 ..., Re: Lean codes P0171 P0174 need suggestions. by terd_ferguson_1 » Tue Jul 29, 2014 5:26 am. If your running the stock intake, something to try is ensure you have a Motorcraft air filter installed, some aftermarket filters can cause issues, as well on your filter door from factory it came with a foam tape on the sides and either bottom or top ..., 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., Labor: 1.0. 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., P0171. by hookedoncrime » Mon Jan 02, 2006 10:56 pm. Hello, first time poster here. I've been lurking for a while and decided to post to see what help I can get. Anyway, to the problem. I changed my plugs a couple days ago and I had some misses. I fixed the misses and shortly after a code came up reading P0171 - System too lean …, Engine / Drivetrain Talk - 2004 F150 with codes: P0171, P0174, P0191, P0301 - I recently was driving from San Angelo, Texas to Fort Hood, Texas... about a 158mile drive. While driving, my 2004 F150 FX4 started to sputter and felt as if it wanted to shut off and the Emission System Light stays on. The slower i went the..., 2004 - 2008 Ford F150 - P0171, p0303, p0353 - These are the codes I pulled after I got home from work today. So, I went to the dealership and bought a new COP ($87.42), and replaced it., 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 ..., code p0171. 4 posts • Page 1 of 1. wombat6 New Member Posts: 1 ... code p0171. Post by wombat6 » Thu Jul 29, 2004 2:11 pm. can anyone tell me what this is says bank 1 too lean on a 2000 ford 4 cyl code from ob 2 scanner. Top. Webmaster Administrator Posts: 10006 Joined: Sat May 26, 2001 12:00 am Truck: 2003 F-150 King Ranch SuperCrew 4x4 ..., Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content ... Truck: 1998 f150 xlt Location: baltimore. p0301 p0306, p0171,p0174. Post by mark4861 » Thu May 16, 2013 4:04 pm. 1 and 6 cylinder keep popping this code, both wires can't be bad, 2 plugs arne't the problem, both fuel injector's bad, I don't think it's ..., 1997 - 2003 Ford F150 - check engine light code P0171 - code P0171 My light just came on after i did some towing of my 2 boats. I had my MAF changed a few months back and my 02 Sensors changed not to long ago. Do you think its just a temporary light because of the load of my trailer and boats. I had the code checked..., 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..., 2004 - 2008 F150 - 2004 F-150 5.4 P0174 Code, Please Help! - I have 2004- F-150 FX4. I keep getting P0174 code, fuel lean in bank 2. The problem I am having is it is intermittent. I start it up in the morning and get about 1 to 2 miles down the road. Truck goes into overdrive and start jerking and shuddering under..., Ford code p0171 and p0174 maf issuesMazda 6 p0171 and p0174 🏝🚘 tip para solucionar el código de falla p0171 en ford f-150 🚘🏝Ford p0022 f150 p0012 code timing codes variable valve vct solenoid 1994. Ford p0171 & p0174 lean codesP0171 ford f150 1998 fix sensor maf P0171 code ford f150: meaning, symptoms, & fixesFord f150 code p0171., The 1957-1958 Ford Ranchero and Courier pickups were pioneering designs. See pictures and learn about the 1957-1958 Ford Ranchero and Courier. Advertisement The 1957-1958 Ford Ranc..., 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., As to Codes PO171 and PO174... these are BOTH indicative of a lean condition. 171 indicates a lean condition on bank one (driver's side cylinders) and 174 indicates a lean condition on bank two (passenger side cylinders)., The P0171 code is a diagnostic trouble code that indicates a lean condition in the engine’s fuel mixture on Ford vehicles. This code specifically refers to Bank 1, …, Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content. Quick links. FAQ; F150 Forum. Engine / Transmission / Drivetrain. Modular/Triton V8 Engines: 4.6L, 5.4L (97-10) Looking for recent topics? code P0171 and P0174. 8 posts • Page 1 of 1. robruf Regular Member Posts: 50 Joined: Mon Oct 13, 2003 2:02 am ...