01 f150 p0171. I am a novice and have never worked under the.

01 f150 p0171 Aug 20, 2023 · P0171/P0174 Ford f150. I changed out the ignition coil, and all plugs, verified wires good. It happened awhile ago but then the light went off. Last week I decided to try and check the Egr valve for carbon build up, and Couldn't get the EGR to exhaust manifold tube loose. Jul 24, 2015 · 1997 - 2003 F150 - Lean codes P0171 and P0174 SOLVED! - I finally found out what was giving me the codes and engine performance issues. 2004 FORD F150 P0171, P0174, P0301, Misfire, and Lean Condition. (Air/Fuel Nov 2, 2008 · 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. Jul 9, 2018 · Why does code P0171 affect Ford applications more than others? While no gasoline engine is immune to the causes that set code P0171, many Ford applications have been particularly susceptible to P0171 for many years, with engine vacuum leaks that lean out the fuel mixture being by far the most common. What sticks out to me is, I only have the P0174 code, and everyone else seems to have that, AND the P0171 code. If the P0171 is set in along with the P0174 code, it is highly likely that the problem is caused by an intake leak. Truck: 2014 STX F-150 Location Tech Notes for P0171. I've Done All Of The Tests And I Still Have Codes P0171, P0174. Lean 01 ford f 150 4. Seems like it's running fine ,but cannot get anyone to figure out the 172 code rich bank 1 . The P0171 fault code indicates that the engine's fuel system is too thin, often caused by vacuum leakage, MAF sensor failure or insufficient fuel pressure. I had a Ford tech on yahoo answers tell me its probably the upper intake gasket. P0171 is triggered by the engine bank 1 “upstream” oxygen sensor and P0174 is triggered by the engine bank 2 “upstream” oxygen sensor. Dec 6, 2011 · Maintenance Shop - 2001 f150 5. I figured it had to be something simple because during cranking the engine would spin over for over 3 seconds before firing off. The bubbling you see is the spray hitting the hot engine. 4l v8 xlt codes - I have these codes popping up with a service engine soon light on: “System too Lean” Bank 1 P0171 Bank 2 P0174 i know it’s an issue with too lean of fuel, does anyone know where to start. Several factors can trigger this issue: A malfunctioning oxygen sensor might send incorrect signals to the Engine Control Unit (ECU), leading it to lean out the mixture unnecessarily. In this video I will show you how to use freeze fr Customer: My check engine light is on in my 2022 f150. We are not mechanics but can turn a few wrenches. 01 pm Hopefully someone is still monitoring this thread. Could anyone tell me more about these codes before I tear my Aug 5, 2014 · 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 4x4 Other Fords owned: 00 Taurus, 96 T-Bird, 95 Escort GT, 93 Mustang 5. It has died a couple times at stop signs. I have also replaced pcv and hose ends. 4L) - 4. I assume that this could be due to either a bad oxygen sensor or a bad P0171 is showing on scanner but not a service light on , then after about 30 miles p0172 go's active and turns service engine light on . The truck began idling rough. The truck has 66,000 miles and I have owned it since it was new. Wondering has anyone experienced this code Vehicle: 2001 Ford F150 4. The P0171 code indicates an imbalance in the engine’s air-fuel mixture, leading to performance degradation. The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. I suspected all along that the cause was the intake manifold gaskets. If your F150 has only one cylinder head (inline four or six), bank one will be the only bank, and you don’t need to concern yourself with which side of the engine is which. I decided to hook up my fuel pressure gauge, and it See full list on 700r4transmissionhq. User Submitted Video. 6, with 175,000 miles on it. Once reset, it doesn't come back on unless it has sat for awhile. I have a 2000 Expedition with a 4. Having both codes indicates that whatever is causing these lean codes is affecting both sides of the engine The most common cause of the P0171 code – and the P0170 and P0173-P0174 codes – is unmetered air entering the combustion system. The side of the engine with the first cylinder is bank one. 00 STFT B2 -100. This is my Mar 14, 2008 · Maintenance Shop - P 0174, p0171, p0401 Problem solved - Just a quick posting to thank the F150 forum for being there. Disconnected or Mar 4, 2025 · 1997 - 2003 Ford F150 - Dreaded P0171 Mystery with pics/scan data - Have only one code on my 2003 4. Typically it is a This is a Ford Expedition 5. I have had lean codes P0171 & P0174 for a few years and finally did something about it. No codes until middle of summer, then started getting just the Feb 1, 2025 · What the P0171 Code Means. 4. 2l 125000 miles on it. They had a exhaust on it with no cats or o2 sensors. 4l codes p0171 and p0174 HELP!!! - the truck runs fine sometimes but seems to be getting worse. The location of this problem 2004 FORD F150 P0171, P0174, P0301, Misfire, and Lean Condition. 4L P0171 P0174 Cold weather sensitive idle issue - Hello Everyone New here and hoping for some help / direction. 4 - My truck throws a P0171 code and sometimes a P0174 code when first run at outside temps under 50 deg F. 00 LTFT i have a 01 f150 with codes p0302 and p0171 replaced coil, wire, plug, inj, check power to coil and comp test all good Mechanic's Assistant chat Customer: I HAVE A 01 F150 WITH CODES P0302 AND P0171 REPLACED COIL, WIRE, PLUG, INJ, CHECK POWER TO COIL AND COMP TEST ALL GOOD Engine Bank 2 is the opposite side of the engine. Q: What are the common symptoms of Ford code P0171? A: Symptoms may include reduced fuel economy, rough idling, engine misfires, and decreased performance. Most of the time, this happens due to faulty or dirty mass Oct 19, 2011 · 1997 - 2003 Ford F150 - 2001 f150 4. Jun 16, 2011 · P0171 And P0174 Essentials. 2 5speed - I had the check engine light come on and went to autozone and had the codes read. Doesn't happen when first started. 6L Supercrew, the dreaded P0171. Digging into the root cause of the P0171 code, you’ll likely find that one of several common culprits is to blame. Oct 20, 2017 · 1997 - 2003 Ford F150 - P0171 & P0174 codes on 2001 5. 4L and my check engine light came on last night! Dec 18, 2008 | 01:22 AM Jan 9, 2017 · 1997 - 2003 F150 - 01 F150 5. how do diagnose this problem? Ford F150's engine codes Mechanic's Assistant: Is the check engine light blinking or flashing, or is it solid? When did you first notice it? Customer: It’s solid. Fix: technician confirmed that there is no vacuum leak by doing a smoke test on cold and then warmed up the engine. When they appear together, it indicates that the entire engine is running lean. I have cleaned MAF, IAC, IAT. just bought the thing. , the check engine light was lit up at time of purchase. It fixed the issue. It has new O2 sensors on the pass side banks, Map and Air charge temp sensors as well as a new IAC motor and Jan 10, 2025 · Understanding the P0171 code is vital to addressing the underlying problem and restoring peak engine performance. It indicates that your Ford F150 is running lean on the bank two side of the engine. Fuel pressure is good. By themselves, these are some of the most common OBD2 codes. Debido a que en ocasiones pequeños detalles s Dec 21, 2005 · Modular V8 (4. 6L gas engine in it and the MIL is lit. 3 times the 1997 Ford f-150 codes P0171 & P0174 Regardless of the root cause, once your car computer registers P0171, Track the culprit and fix it as soon as possible. Q. Did some searching and looks like maybe a vacuum leak. 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. There are articles online that show the number of things to check to try to find the cause and fix. Code P0171 causes can range from easier-to-find issues to more complex problems and can vary among vehicles. P0171 Causes to Look for and Diagnose First: Tools needed for diagnosing advanced P0171 code causes: OBD II scanner or code reader ; Carburetor or throttle body cleaner; 1. I started last winter with P0171 and P0174 only when very cold air temp. 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. Jan 27, 2022 · This 2004 F-150 has leaned codes P0171 and P0174. When is the Code Detected? Date: September 17, 2013 at 4:01 am What exactly Nov 1, 2014 · 1997 - 2003 Ford F150 - 2001 5. P0174 and P0171 (fuel trim lean bank one) are the most frequently seen air/fuel mixture-related codes. Low Fuel Pressure Causing A Lean Condition. Feb 2, 2010 · 1997 - 2003 F150 - Ford F150 - Codes P0171 & P0174 - My F150 check engine light came on and I was able to use a code key to find out the problem codes. Replace the hose in the back of the air intake manifold. 2L V6 - Trouble code P0171 & P0174 on a 2003 F-150 with 4. Usually comes on at a stop sign after about 5 miles. Hi guys; I just got a hit on P0171/P0174. com Apr 30, 2025 · Code P0171 or system too lean bank 1 means too much oxygen or too little fuel in the exhaust. P0171 Symptoms Sep 10, 2024 · Q: What does Ford code P0171 mean? A: Ford code P0171 indicates a “System Too Lean (Bank 1)” condition, meaning the engine is receiving too much air or not enough fuel. P0171/P0174 Ford crown Oct 9, 2018 · One of the most common trouble codes with the Ford F150 is P0174. Bank 1. The codes are P0171 and P2BF1. How to determine the cause of a lean condition on a Ford 5. Definition Both of these codes are generic, which means they have the same meaning Dec 18, 2008 · 1997 - 2003 F150 - 2001 F150 codes P0171,P0174 - I have a 2001 f150 supercrew with the 5. 0, 93 Festiva, 92 Sable, 86 Mustang, 82 Mustang F150 Forum Nov 13, 2019 · 1997 - 2003 Ford F150 - 2001 - P0171 code questions - My son's truck recently had service engine light, I read the code with my cheap little NAPA reader and got a P0171. Checking For Vacuum Leaks With Carb Spray. 2002 f-150 and p0174 and p0171. Other Important P0171 And P0174 Tests. It is not necessarily exclusive to the Ford F150 truck and sees use in other models and vehicles. It is a ‘lean’ condition or ‘low fuel trim’ code. P0171 & P0174. 81 LTFT B1 25. Jan 27, 2025 · A P0171 code indicates that the engine is running too lean on Bank 1, which means there is insufficient fuel or excessive air in the combustion mixture. I have not found anyone that has had the same issue. This code represents a problem in the exhaust system and can be connected to the $7E8 Engine Code. Nov 24, 2017 · 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. Feb 17, 2007 · 1997 - 2003 F150 - P0171 & P0174 on 4. 2L V6. The O2 sensors have the ability to correct a fuel mixture of +-15%. What Does Code P0171 Mean? The P0171 is a diagnostic trouble code (DTC) that means, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. When you take it apart an 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. In simple terms, it’s caused by too little fuel or too much air. The vacuum leaks are the first things to check when your car registers the P0171 fault code. 7 lb/min (5g/sec) at idle and goes to 4. Sep 28, 2019 · Modular V8 (4. Common Causes of P0171 Code. Truck has rough idle and is rough on acceleration. 4L with 150K miles. A firing order and cylinder location diagram may be needed to see which side of the engine is Bank 1 or Bank 2. Where are Bank 1 and Bank 2? TEST 1: Fuel Trim Check. Cleaned MAF, checked air intake, no vacuum leaks. I read the codes from the computer and the only code showing is the P0174 which is the System Too Lean (Bank 2) fault. Gonna cawl Nov 14, 2018 · 1997 - 2003 F150 - p0171, p0174, & p0420 - 2002 f-150 5. If it needs to be corrected more than that, the P0171 code will be stored. 2) with a 5 speed stick transmission. 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. 4 with a vacuum leak causing "System Too Lean" trouble codes P0171 and P0174. A lean condition occurs when the engine either receives too little fuel or too much air. Had trim codes recalibrated and updated engine computer . 2L. Jul 23, 2023 · 2009-2010 Ford F-150 2009-2011 Ford E-150 2004 FORD F150 P0171, P0174, P0301, Misfire, and Lean Condition 2018 at 1:01 pm Hopefully someone is still Sep 14, 2012 · 1997 - 2003 F150 - Dreaded P0171 & P0174but only when cold! - So I recently bought my 2001 F150 4. 2002 F150 2WD Crecab 5. The Ford Trouble Code P0171 OBD-II code indicates that the fuel system on the first edge of the engine is weak or there is a vacuum leak near this side of the engine. A lean code or codes suggest that there surely is too-much air in the exhaust. 4 engine. P0171 and P0174 both showed up. How to locate a vacuum leak without a smoke machine. it had 9 engine codes on it ranging from egr to o2 sensor, missfire and etc. Jul 7, 2020 · P0171 and P0174 both indicate that there is a lean condition present in your Ford F150. 4L Super Crew that hates temps below 50 degrees. 7 lb/min Dec 2, 2016 · 1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck. 6L Problem: MIL Lamp on, P0171, P0174. But does anyone In this video, I show you how I troubleshoot a Check Engine Light (CEL) / Diagnostic Trouble Code (DTC) P0171, System Too Lean Bank 1. I’m sure it’s Mass air flow sensor, 02 sensor, pcv possibly. May 10, 2025 · Learn what fuel trim system lean and OBD-II code P0171 mean, their symptoms, causes like vacuum leaks or low fuel pressure, and how to diagnose and fix a lean air-fuel ratio issue effectively. It is a specific indicator of “System Too Lean Bank1,” signifying an unsatisfactory air-fuel ratio in Bank 1 of the engine. Oct 13, 2009 · 1997 - 2003 F150 - Engine code p0171 and p0174 - I have a 01 f150 with v6 4. , 186000mi I'm getting codes p0171, p0174 &p0420. Here’s a list of the most common causes of a lean condition. Here The following are some of the most common causes of this P0174 code: Sep 22, 2023 · 1997 - 2003 Ford F150 - 01’ f150 5. The truck is a 2001 6cyl (4. 6 v8 has been running rough lately. the freezeframe data says this: STFT B1 7. Dec 20, 2009 · 1997 - 2003 F150 - codes P0171 & P0174 '01 F150 4. The truck runs fine, I haven't noticed any problems other than the CEL. Most Common Causes Of P0171, P0174 DTCs. 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. How I fixed my P0171 and P0174 trouble codes on a 2003 Ford F150. Car: 1998 Ford F-150 Lariat 4. 2L codes p0171-p1518-p1401-p1131-p1151-p A. Aug 21, 2010 · 1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck. 4 P0171 & P0174 Fixed - Hello, I have been a long time lurker and finally had something constructive to post. 2L Std cab, 2wd, 168k miles on it. I have a 2002 Ford Mar 17, 2023 · What does the P0171 code mean? The P0171 code indicates that the oxygen (O2) sensor on bank 1 sent a signal to the engine control module that the air-fuel mixture is too lean to be corrected. The thought of Dec 6, 2005 · If your P0171 and P0174 has gone away---then the intake is not leaking. 4L) - P0174: System Too Lean (BAnk 2) - I have a 2001 F150 with the 4. Does the P0171 Code Need to be Addressed Immediately? Sep 12, 2019 · 1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck. 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. 2L (165k miles) Codes: P0171 and P0174 (system too lean, banks 1 and 2) Long term fuel trims are all around 30% Symptoms: I've had these codes for a few years with no noticeable problems Then, out of nowhere, after a long idle (in gear with foot on brake, such as in a drive-thru line) my truck would start to shake. If they appear together, it reduces the list of Nov 21, 2018 · If your F150’s PCM detected a lean condition, it would store P0171. Jul 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. For more information on this topic, Tutorial para tomar en consideración cuando se presenta el código de falla P0171 en las camionetas Ford F-150. Mar 14, 2022 · In this video, I fixed the source of the P0171 code on my 2001 Ford F-150. Fuel pressure seemed to be OK, without any drops so he changed the MAF sensor. Have a 2001 F150 5. 6L, 5. See the “Location” section for more details. Penland | ASE Master Certified, ASE Advanced Gasoline Engine Performance 16,429 Satisfied Customers. TEST 2: Inducing A Rich Condition. The p0171 is an engine code that can be obtained by scanning using an ODBII scanner. Apr 28, 2022 · Definition Of P0171 Ford F150. This code means the O2 sensors detected a lean fuel condition in bank 1 of the eng Sep 16, 2019 · Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these codes derive from Oxygen Sensor (O-2) readings. Dec 1, 2010 · Joined: Wed Dec 01, 2010 7:23 pm. 6 P0174 Code - I've looked around the forums quite a bit. I am a novice and have never worked under the May 25, 2022 · Code P0171 Causes and How to Diagnose Them. However, if you are after the most common cause of P0171 fault codes; Vacuum leaks. The exact vehicle in Dec 23, 2015 · 1997 - 2003 Ford F150 - Check engine light on with P0171 and P0174 codes - My 97 F150 4. Nov 21, 2015 · Check engine light P0171 bank 1 mix too lean. MAF is . trewmm udyjhhr zlfg hlidc mcxnwlz wvbzqyv yno obiw mcu tmchtfg