Ford f150 p0171 code

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.

2005 Ford F150 5.4 famous P0171 system to lean bank one. 2005 Ford F150 5.4 famous P0171 system to lean bank one P0022 intake camshaft position timing over retarded bank to add P219802 sensor signal based stuck rich bank two sensor one. Replace both vct solenoids three weeks ago due to rough idle and pull the plugs started it ran great so I ...SOURCE: 99 CHEVY trouble shoot code P0171. LEAN TROUBLE CODES (P0171 or P0174) A code P0171 or P0174 indicate the engine is running lean. This means there is too much air and/or not enough fuel. You can confirm the engine is running lean by looking at Short Term Fuel Trim (STFT) and Long Term Fuel Trim (LTFT).1997 - 2003 Ford F150; code p0171; Topic Sponsor. 1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck. code p0171. Reply Subscribe . Thread Tools Search this Thread 11-08-2018, 03:53 PM #1 ...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,...Ford F150: p0171..cyl banks..with 4.2L V6, AT, ac, 206000 miles - Answered by a verified Ford Mechanic. ... 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.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 ... 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 ...

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.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 ...1997 - 2003 Ford F150 - P171 and P174 Codes - I have and 02 4.2L F150 that keeps giving me the P171 and P174 trouble codes. In other words, the left and right banks are running lean. The truck has 104K miles. Roughly 6 months ago the lower intake manifold was replaced (original cracked and I caught it early) with a...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 ...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.1997-2006 Expedition & Navigator - 01 Expedition 5.4, codes P0171 and P0301 - I have a 2001 Expedition with a 5.4 and 227,000 miles on it, been having all kinds of misfire problems the past year. The latest is it's running lean on bank 1 and misfire on cylinder 1. Put in new plug and coil on 1.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 moreOn the back of the intake, you cannot see it very well so feel for softness or other signs of an issue. I just thought you should know what your working with. Good luck. 1997 - 2003 F150 - 03' F150 SES Light: code P0171 - The service engine soon light on my 2003 F150 Supercrew 4.6L (225k miles) just came on.

1997-2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator DiscussionThe Ford F150 is one of the most popular and powerful trucks on the market. It has been a staple of American roads for decades, and its reputation for reliability and performance i...P 0174, p0171, p0401 Problem solved. Just a quick posting to thank the F150 forum for being there. After experiencing the above "System too Lean" codes and "EGR flow insufficient" I read nearly every entry on solving this problem for my 2002 F150 4.2L. This truck has 252,000 miles on the odo, and still gets 19MPG, but when pulling a trailer I ...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. Nov 29, 2017 · Let's have a look at this 97 Ford F150 with the classic P0171 "Lean Bank 1" code that seems to happens to these Fords more often than not. Typically it is a ...

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F150 Codes P0171 / P0174 Information. Post 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. ... 2003 Ford F-150 SuperCrew King Ranch 4x4 Previous trucks: 02 F-150 SuperCrew XLT, 11 F-150 EcoBoost Lariat, 07 Ranger, 01 SuperCrew, 98 SuperCab 4x4The 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 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 ...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).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%...General F150 Discussion - 1999 Ford F150 P0171 & P0174 code problems - I have a 1999 Ford F150 that keeps throwing P0171 & P0174 code. I have already changed all of the 02 sensors, the mass flow sensor, fuel filter, egr, idle control sensor, checked for vacuum leaks, replaced pcv hose ( there was a hole in the hose)...

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.Description. The Fuel Rail Pressure (FRP) Sensor is a diaphragm strain gauge device. The FRP sensor measures the pressure difference between the fuel rail and atmospheric pressure. The FRP sensor nominal output varies between 0.5 and 4.5 volts, with 0.5 volts corresponding to 0 MPa (0 psi) gauge and 4.5 volts corresponding to 26 MPa (3771 psi ...How to fix a Ford P0171 engine code: System Too Lean (Bank 1) A lean condition exists if the engine is getting more air than fuel in the cylinders. (Air/Fuel Ratio is off) P0171 Code is ...Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content. ... Non-EcoBoost V6 Engines - 4.2L (1997-2008), 3.7L (2011-newer) Looking for recent topics? Need help trouble shooting P0171, P0174, P0302, P0303, P0304, P0305 in 2001 4.2L. 3 posts • Page 1 of 1. CliffnChris ... Codes 171/174 tell you the intake is lean ...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 ...2021-2023 F-150 - 3.3L Engine - Illuminated Malfunction Indicator Light (MIL) With Diagnostic Trouble Code (DTC) P0171 Stored In The PCM . Some 2021-2023 F-150 vehicles equipped with a 3.3L engine may exhibit an illuminated MIL in the ... the Ford Diagnosis and Repair System (FDRS). Inform the customer they can continue to drive theDiagnosing and repairing the P0401 Code on an 08 Ford F150 with the 4.6l V8 engine.Don't forget to connect with me on Facebook:https://www.facebook.com/Salem...1997 - 2003 F150 - codes P0171 & P0174 '01 F150 4.2 5speed - I had the check engine light come on and went to autozone and had the codes read. P0171 and P0174 both showed up. The truck is a 2001 6cyl (4.2) with a 5 speed stick transmission. The truck has 66,000 miles and I have owned it since it was new. This is my...General F150 Discussion - 1999 Ford F150 P0171 & P0174 code problems - I have a 1999 Ford F150 that keeps throwing P0171 & P0174 code. I have already changed all of the 02 sensors, the mass flow sensor, fuel filter, egr, idle control sensor, checked for vacuum leaks, replaced pcv hose ( there was a hole in the hose)...Feb 11, 2018 · 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....

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.

The cost to diagnose the P0171 2006 Ford F150 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.Oct 11, 2022 ... Comments14 ; P0171 Trouble Code: System Too Lean Bank 1 Diagnosis. Big Dog50001 Automotive · 2.5M views ; Does the Ranger Still Suck (Air)?! Let's ...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.I have a Ford F150 with a 4.2L engine setting trouble codes P0171 and P0174. I have cleaned the MAF sensor, replaced the fuel filter, checked the fuel pressure (which is 32psi at the injectors) and ch … read moreRe: NEED HELP code p0171, not the easy fix. by markgloverville » Thu Feb 04, 2010 12:53 am. 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.Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content. Quick links. FAQ; F150 Forum. Ford F-150 / F-Series Generations. ... Also for the p0171/p0174 codes found out the MAF sensor I changed out with wasn't working properly. the barametric sensor said I was driving in the moutains. Replaced MAF …This 2005 Ford truck has the classic lean DTCs P0171 and P0174. My first thought was...VACUUM LEAK! But not so fast...Enjoy!Ivan. This 2005 Ford truck has the classic lean DTCs P0171 and P0174. My ...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.OBDII Ford Code Definitions. Be sure to double check the codes. ... P0171: Fuel trim (FT) system too lean, bank 1: Intake/exhaust leak, AIR system, MAFNAF sensor, fuel pressure/pump, injector(s), HO2S: P0174: Fuel Injection System Too Lean Bank 2: Vacuum leaks, PCV valve: P0191: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 ...

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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.1997-2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator DiscussionP0171 - 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 ...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...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: 10005 Joined: Sat May 26, 2001 12:00 am Truck: 2003 F-150 King Ranch SuperCrew 4x4 ...2004 f150: rough idle..mass air..fuel filter o2s 1&2 60..lean. 2004 f150 codes p0171 & 174 p2195 & p2197 rough idle stft 45 ltft 0 cleaned mass air flo changing fuel filter o2s 1&2 60 at idle 2000 rpm read more. Ron.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.A P0171 Code on Your Ford F150 is also called a “system too lean” for Bank 2. This code refers to two separate banks in the engine. The first bank represents cylinders one and two, while the second bank represents cylinders three and four. The PCM will set this code when it sees that the fuel range for these two cylinders is not in line ...Labor: 1.0. To diagnose the P0171 2004 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. ….

All times are GMT -4. The time now is . 1997 - 2003 Ford F150 - P0171 and P0304 codes - I have a reg cab 4.6l f150 coding p0171 (bank 1 too lean) and p0304 (misfire on cylinder 4). Being the truck is backfiring at the bottom of gears (its a standard), and stuttering in the gear and up hills, I was thinking fuel pump or clogged fuel filter.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 ...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. Looking for recent topics? OBDII code P0171. 1 post • Page 1 of 1. Epistuff New Member Posts: 1 Joined: Thu Nov 02, 2006 11:37 pm. OBDII ...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...Mar 23, 2015 ... Comments11 · F150 Runs Rough, Lean P0171 P0174 (SI Ep 6.2) · Diagnosing a Faulty Mass Air Flow Sensor: P0171 P0174 Lean Codes · FORD P0171 and...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.The codes P0190 and P0191 are fuel pressure sensor codes and the codes P0171 and P0174 are lean code and the usually suspect for the problem you describing is usually caused by a drop in fuel pressure usually due to either a failing fuel pump and or a bad fuel pump driver module .The 2004 has known issues with corrosion and moisture …The long term fuel trim diagnostic parameter is an average of several of the long term speed load learn cells which the PCM selects based on the engine speed and the engine load. 2004 - 2008 F150 - 2004 F150 5.4 codes P0172 & P0174 - I've been going through trouble shooting with no luck. Originally I was have these codes plus misfire on #1. Ford f150 p0171 code, The FPDM is in good shape. Ford has had the truck for 2 weeks now and still have no answers. Nothing but the 700$ they charged me for the throtttle body replacement, that did nothing. 2004 - 2008 F150 - 05 f150 throwing P0191 code - Can anyone tell me where the fuel pressure regulator is located, I've located every othe part related to the fuel ..., 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 ..., Check engine light P0171 bank 1 mix too lean. The truck began idling rough.Replace the hose in the back of the air intake manifold. When you take it apart an..., The P0171 code typically indicates a lean condition in the air/fuel mixture, which can cause engine damage if not addressed. It is best to have the vehicle inspected and repaired by a qualified mechanic as soon as possible. In conclusion, the Ford engine code P0171 is a common issue that many Ford owners may encounter., 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. See more, 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..., 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., The CEL flashed a couple times so I checked for codes using my Engine Link app and ELM327. No trouble codes but under pending codes I got P0171 (Bank 1 Lean), P0300 (Random misfires bank 1), and P0303 (Cyl 3 misfire). I cleared the codes a couple times and P0171 keeps coming back, but the misfire has moved around to cylinders 4 and 5 (weird ..., RkyMtnHi Hardcore Ford Truck Fanatic Posts: 4596 Joined: Sun Aug 22, 2004 1:58 am Truck: 1999 F-150 4X4 -5.4 Location: Denver, Colorado, 2004 - 2008 Ford F150 - 2004 trton 3v P0171 - hey yall… I have an 04 3v I got from some guy off of facebook. has the P0171 code... I need help. I have done plugs, 02 sensors, egr, and just about everything under the sun. I cannot get my truck to run right. its a slug, sputters, no power when accelerating, truck just..., Popular Mechanics Magazine can recommend trying a few troubleshooting steps to resolve the P0171 code in a Ford F150. One technique is to check for vacuum leaks using a smoke machine or by spraying carburetor cleaner around the intake manifold and vacuum lines while the engine is running. Another suggestion is to clean or replace the Mass Air ..., Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content. Quick links. FAQ; F150 Forum. ... that goes from 3/8" to 5/8" at the manifold and it deteriorates over time causing enough of a vaccumm leak to set the P0171 and P0174 codes rtjohnson1964 . Top. ToddPhilly, 2001 F150 4.2L V6. Tuneup Plugs (finewire if it matters autolite brand), wires, air/fuel filters. 500 or so miles later I started having the issue of 0171 and 0174, cleared it to return again. I'm going to try the MAF cleaner, check hoses, and hopefully not have to do any intake work $$$., Apr 25, 2018 ... ... f150 p0171 p0174 2004 f150 p0171 p0174 p0171 code ford f150 02 f150 p0171 ford f150 code p0171 rough idle ford f 150 v6 p0171 what is a p0171, P0201 is one of the more common OBD-II trouble codes. It indicates that the first cylinder in the firing order has an injector malfunction. It’s generic, which means that it has the same meaning for the Ford F150 as it would for any other vehicle. When the PCM sees voltage at cylinder 1 that is out of the normal operating range, it’ll ..., Jul 20, 2022 · 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. , P 0174, p0171, p0401 Problem solved. Just a quick posting to thank the F150 forum for being there. After experiencing the above "System too Lean" codes and "EGR flow insufficient" I read nearly every entry on solving this problem for my 2002 F150 4.2L. This truck has 252,000 miles on the odo, and still gets 19MPG, but when pulling a trailer I ..., Mar 31, 2018 ... ... f150 p0174 code p0174 f150 5.4 p0174 f150 4.2 p0174 f150 4.6 p0174 ford f150 ford f150 p0174 code 2004 f150 p0174 f150 p0171 p0174 ford f150 ..., In this video I discuss common causes associated with Ford F series trucks experiencing a rough idle condition and/or codes P0171 and/or P0174. A common caus..., 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 ..., 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., Inspect your COP boots and wire if you change your plugs, use dielectric grease in the boots and anti-seize on the plug thread. Check these links for possible solutions... OBD-II Trouble Code: P0171 System Too Lean (Bank 1) , OBD-II Trouble Code: P0302 Cylinder 2 Two Misfire Detected. Reply Like. # 3., 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...., 1997 - 2003 Ford F-150. ... Code P0171 and P0174. 5 posts • Page 1 of 1. jcassidy New Member Posts: 1 Joined: Thu Dec 11, 2008 5:44 pm. Code P0171 and P0174. Post by jcassidy » Thu Dec 11, 2008 5:51 pm. I had the Check Engine Soon light come on for my 2003 F 150. The code was Po171 and P0174. I was told this would require a TSB for the upper ..., 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 ..., 1997-2006 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 - 2001 F150 codes P0171,P0174 - I have a 2001 f150 supercrew with the 5.4L and my check engine light came on last night! I check the codes and they are P0171, and P0174 which is lean on banks 1 and 2? Here is my story I had the same codes when my truck hit 95,000 miles and I had 2 missfire codes on #7..., 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 ..., 2003 Ford F-150 5.4L V8 FX4 ... Running rough, code P0171.....any help please!!! Post by Platinumkanikas » Sun Mar 07, 2010 8:49 pm. Listen for hissing. I had the same problem. I have a 99 4.2L so I don't know if your problem will be the same as mine. But... I had a big hold in a rubber elbow located underneath the throttle body., 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 ..., Status: Confirmed. Click to search for description on the Internet ... P0082. Intake valve control solenoid, bank 2 - circuit low Status: Confirmed. Click to search for …, 3.8 & 4.2L V6 - P0171 and P0174 - I'm at 51,000 miles in a 2003 4.2L F150 and my first check engine light came on. Ran by Autozone and got them to scan for codes. I have the P0171 and P0174, lean on both banks. The thing that gets me is the engine runs fine. No rough idle, cranks fine, holds mph and still has plenty..., The code is used to diagnose engine issues, such as misfires, emissions, and other problems. The code is stored in the F-150's computer, and can be accessed with a code reader or diagnostic scanner. What Is Code P0171 Ford F150? Code P0171 is a generic OBD-II code that stands for "System Too Lean (Bank 1)."