Ford f150 p0171 code

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? service engine... codes p0171 and p0174. 8 posts • Page 1 of 1. xrebelpride09x New Member Posts: 21 Joined: Mon Jul 14, 2008 5:38 pm Location: Texas.

by CollinsTech » Wed Dec 07, 2005 10:41 pm. If your P0171 and P0174 has gone away---then the intake is not leaking. The bubbling you see is the spray hitting the hot engine. Also, you sometimes hear what sounds like a vacuum leak, but it isn't. If the P0401 is the only code you are getting, then it is not the intake.I have a P0022, P0171, and P0175 codes on my 04 f150 5.4 ... 04 Ford F-150 SuperCrew 5.4L Started running rough on the way to work. P0022 Code-Intake Camshaft Position Timing-Over-Retarded Bank 2 Possible/likely causes-VCT Solenoid, contaminated VCT (I keep my ...I'm getting codes p0171 and p0174. 2004 - 2008 Ford F150 - 2006 f150 5.4 p0171 - I got a 06 f150 that is consistently throwing a lean code p0171 and sometimes a p0174. When I first got truck it had a issue with running and a new fuel pressure regulator sensor fixed that issue. I've smoked tested for vacum leaks coming off the brake booster hose ...Area Codes Search Notes. Fixed phone numbers in Argentina, Santiago del Estero are comprised of a single country code (+54), a 2 digit area code, a 2 digit region code, and a 60 digit line code. Making a call with the wrong country, area, or region code can be costly. Browse our sites area and region codes by region and city to ensure you have the correct information for your calls.The methods in this video can be used when diagnosing evap systems. Keep in mind vehicles will vary between manufacturers.In this video we are working on a ...Ford F150 Forum. The site for Ford truck owners, by Ford truck owners. Skip to content. ... 97' F-150 4X4 4.6L Triton pulling P0300,P0171 & P0174 Extremely rough iddle and stalls occasionally. What should I look for? ... it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is ...P0301 is a fairly common trouble code with the Ford F150. It's an OBD2 code and indicates that your truck’s first cylinder is misfiring. P0301 is certainly a cause for concern and should be considered a threat to the drivability of your F150. ... When your F150 has P0301 and P0171 together, it’s often caused by a clogged or underperforming ...

Re: 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.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 F150Ford 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 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.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.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...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...

=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈===== How to Fix P0171 =====Engine Code P0171 Saving Repair...2015 - 2020 Ford F150 - Trouble Code P0471 - Driving this weekend and check engine light came on. Stopped at AutoZone and had the code checked. It is P0471 Exhaust Pressure Sensor. I looked it up and there is a TSB on it. Just hit 37,xxx miles, so factory warranty is gone.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...Ford F150 5.4 P0171 & P0174 Lean Codes fixed vacuum leak and runs like new! Any questions I'll be glad to respond. Also showed Fuel sys1 OL-Fault1997 - 2003 Ford F150 - HELP codes p0171 and p0174 on 2001 screw 5.4 - Someone please help. I have a 2001 f150 supercrew with the 5.4 and has codes p0171 and p0174. I checked pcv boot behind intake and it was fine. I seemed to feel some air an inch or 2 under the boot though. Could this be the intake gasket or perhaps...P1131 is a diagnostic trouble code that applies to vehicles manufactured by Ford, including the F150. Trouble codes that start with P1XXX were reserved for manufacturers. This code occurs when the upstream O2 sensor on bank 1 fails a diagnostic test twice in a row. P1131 Quick Facts DTC P1131 is usually caused by a

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I HAVE A 01 F150 WITH CODES P0302 AND P0171 REPLACED COIL, WIRE, PLUG, INJ, CHECK POWER TO COIL AND COMP TEST ALL GOOD - Answered by a verified Ford Mechanic. We use cookies to give you the best possible experience on our website. ... I have a 1999 ford f150 with a p1131, p0171, and p0302 codes present. ...1997 - 2003 Ford F150 - P0171 P0174 codes, need help - 2001 F150 XL, 4.2L V6, RWD. Here's the work I've done: replaced coil pack, spark plugs, left O2 sensor and spark plug wires last year. replaced DPFE and EGR valve last week. replaced MAF last month. ... 1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck. P0171 P0174 ...I got p0171 and p0174 codes coming up (lean in bank 1 and 2). I've got a new fuel pump, fuel filter, fuel injector assembly line, spark plugs,a new MAF sensor and new 02 sensor, PCV valve and theres no air leak. And also the the fuel pressure is speck. I've also hooked the truck up to the computer to check the fuel trims when i spray brake ...1997 - 2003 Ford F150; Code P0171 2003 5.4 lariat... HELP!!! Topic Sponsor. 1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck. Code P0171 2003 5.4 lariat... HELP!!! Reply Subscribe . Thread Tools Search this Thread 03-03-2015, 10:44 PM ...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.

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 ...Video on diagnosing a 1997-2003 Ford F150 Pickup with the 4.2 engine that has the code P0171, system too lean bank 1, and a P0174, system too lean bank 2.htt...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.1997 - 2003 Ford F150 - P0171 & P0174 codes on 2001 5.4 - My truck throws a P0171 code and sometimes a P0174 code when first run at outside temps under 50 deg F. Doesn't happen when first started. Usually comes on at a stop sign after about 5 miles. Once reset, it doesn't come back on unless it has sat for awhile....This is a 25.00 ( ?) item at a Ford dealer, and easy to change. Check this from the 90* to the other end. This is usually the cause of a P0171 code, but not the only. EGR leaks. Some times the diaphragm in EGR will be the cause of the problem. This is the flying saucer shaped dish on the driver's side of the engine. 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 ... When the Ford Falcon was released in late 1960 in Australia, it challenged rival General Motors. Learn how the two companies competed. Advertisement Ford's straightforward compact ...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.I have a 05 expedition with 5.4l 3v engine, codes p0171 p0174 keep setting with long term fuel trim at +30%, i've checked for vacuum leaks and found none, ... It is a 1998 Ford F-150, 5.4L, 4X4 Thanks, XXXXX XXXXX [email protected] ...

The consumption of fuel increases whenever there is an issue with the air-to-fuel ratio of the gasoline mixture, not just for the P0172 trouble code in Ford. As a result, the fuel economy becomes much worse, and you'll have to fill up your fuel tank more often. However, this symptom could also mean a p0022 ford f150.

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...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 - 2001 F150 codes P0171,P0174 - I have a 2001 f150 supercrew with the 5.4L and my check engine light came on last night! ... 0174, 2001, 2003, 42, 54, code, codes, escape, f150, ford, lightning, p0171, p0174, po171, po174, v6. Back to Subforum. 1997 - 2003 F150. View Next Unread. Block Heater for 5.4. Thread Tools. Show ...Heres some info from a Ford CD for a 98 Expo H41 DTCs P0172, P0171, P0174 AND P0175: FUEL SYSTEM AT THE CORRECTED FUEL TRIM Diagnostic Trouble Codes (DTCs) P0171 bank 1 (Cylinder 1) and DTC P0174 bank 2 indicate the fuel/air ratio is too lean. The fuel trim system is at the rich correction limit.After tons of searching I would like to make a sticky. My truck is a 99 lariat 4x4 5.4 v8 2 valve. These are how my freeze Frames came up. Engine speed 618 rpm1997 - 2003 F150 - p0172 & p0174 - Ive got a 99 f150 w/ 4.2. It is throwing both codes p0172 (rich bank 1) and p0174 (lean bank 2). It also has an extreme loss of power. I was wondering if you guys might have any ideas as to what could be causing this although its more than likely a vacuum leak.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 ...

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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; …FORD CODE P0171 SYSTEM TOO LEAN BANK 1. EASY FIXIf you have Ford, your engine light is on and you have code P0171 in this video we will explain what often ca...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...May 22, 2023 · Learn about the P0171 Ford F 150. Discover common causes, possible fixes, and how to prevent this lean code problem in the future. The 1957-1959 Ford styling revolution brought such cars as the Mystere show car and the Skyliner. See pictures and learn all about 1957-1959 Ford styling. Advertisement The 1957 st...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.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...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 ...i have a 2002 ford f150 with a 4.2l. it has codes p0171 lean bank 1 and a p0175 rich bank 2. pulled both oxygen sensors and one was black and one seemed to be getting coolant on it. i replaced the lower intake gasket and out boyh upstrem sensors in it. same codes.. then replaced the maf sensor. still has same codes. it has spark knock at high ... ….

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. 1997 - 2003 Ford F-150. Looking for recent topics? F150 Codes P0171 / P0174 Information. 58 posts Previous; 1; 2; 3; ajhosmer New Member Posts: 13 Joined: Thu Oct 19, 2017 1:57 …2009 - 2014 Ford F150 - 5.0 System Too Rich Codes, P0172, P0175, Cannot Figure Out - I need help guys. I'm working on a 2013 F150 5.0L and it's setting codes for System Too Rich for both banks, or P0172 and P0175. Long term fuel trim is maxed out at -25. Fuel trim immediately goes positive when a lean condition is...Re: P0171, P0174 and P1443 on 1996 Ford F-150. by MookeOVII » Mon Mar 17, 2008 10:08 pm. I have a '96 F-150, 5.0L, that over the last 2 yrs has kept the 171, 174 codes. After cleaning the EGR, MAF, Changing the intake manifold gasket for the newest upgraded version, switching all three O2 sensors, plus the usual filter changes.Jan 8, 2017 · 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. 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.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. I removed and cleaned the MAF sensor. Sometimes these simple steps can clear up these codes...but not this time.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.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! Ford f150 p0171 code, If this does not work, you'll likely need to replace the mass air flow sensor. #P0171 Ford F150 - p0171 ford fix. Typically, the P0171 Ford F150 code means that the air-fuel ratio is not correct, and there is an imbalance between air and fuel. This could mean there is not enough fuel, or there could be too much air in the engine., 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., 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., 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 2, A Ford F150’s fuel tank capacity varies between 23 and 36 gallons depending on whether or not the purchased vehicle is standard or extended range. The Ford F150’s cab style also af..., 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..., 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., 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., 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..., 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., Sep 30, 2010 · p0171 and p0174 on 5.4 supercharged (SOLUTION) I got the codes p0171 and p0174 on my 03 5.4 Supercharged Harley. I had no drivability issues at all but after cleaning my MAF the codes came back. SOLUTION: I didn't hear any hissing but went ahead and followed the PCV hose that goes to the back center of the engine and removed the. , 2003 F150 engine code P0171. My 'service engine soon' light just came on today. Took my truck to Auto Zone and they told my that my fuel trim bank 1 is running too lean. Told me that I either needed (1) oxygen sensor, (2) spark plugs, or (3) fuel injectors. Just wanted to get any input from this site to see which thing I should try first., ODB-II code P0171 Post by EvansLe » Tue Feb 06, 2007 2:40 am I've been dealing with a P0171 code (Bank #1 Lean) on my 2000 F150, 4.2L, 4x4, 5-Speed in the past couple of weeks., 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., 2004 - 2008 F150 - '04 F-150 Heritage code p0174 - I have an '04 F-150 Heritage and the check engine light came on. I hooked a code reader up and it brought up the p0174, system to lean bank 2 code. Only that code. I have seen on other threads and websites that an additional code is thrown along with the p0174, but..., 1997 - 2003 F150 - Service Engine Soon: P0171 - Hi all. I have a 2002 Ford F-150 5.4l V8, 4x4. Today, the service engine soon light came on. I scanned it, and came up with code P0171 System too lean bank one. I've did some searching and learned that one thing to try might be to clean the mass air flow sensor., 2004 - 2008 Ford F150 - P0171 - 2005 Ford F150 4.2 V6 sets P0171 code only.. LTFT B1 reads 29.7 and never changes with rpm's LTFT B2 reads 3.5 + or - and fluctuates with rpm;s FTST B1 READS 5.97 FTST B2 READS 8.22 O2S BANK 1 SENSOR 1 VOLTAGE READS .10 O2S BANK 2 SENSOR 1 VOLTAGE READS .07 Cleaned Maf sensor, checked..., 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., 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 11, 2012 · 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. , 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., Sep 28, 2019 · 01-26-2007 11:01 PM. Reply. /. Modular V8 (4.6L, 5.4L) - 4.6 P0174 Code - I've looked around the forums quite a bit. I have not found anyone that has had the same issue. I have a 2000 Expedition with a 4.6, with 175,000 miles on it. What sticks out to me is, I only have the P0174 code, and everyone else seems to have that, AND the P0171 code ... , Asked by GuruVG4ND Sep 24, 2018 at 01:19 PM about the 2002 Ford F-150 XLT SuperCab 4WD SB. Question type: Maintenance & Repair. ... After diagnostic when trying to buy used car there are codes P0171 and P0174 no engine light on. When test driving everything seems fine. No problem with accele... 2001 Ford Windstar SEL-, I have a 05 F150 with the 4.6L and I'm getting codes P0171 and code P2072. I believe them to be related to fuel evap because sometimes when I'm at half tank the cel goes out but when I refuel it comes back on. Any help would be appreciated. Top. 3FOX ... 2008 Ford F-150" ..., 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., 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... , "Service engine soon" light came on with the code P0171 - Bank one lean Printout from Autozone Definition Fuel trim bank one condition Explanation ... Truck: 1997 Ford F-150 Fx4. Re: Code P0171 "O2 sensor?" Post by davebok9 » Fri Jan 29, 2010 1:12 am. I had the same code a few weeks ago. I replaced the rubber elbow that is at the end of the ..., I have an 02 F150 XLT 4x4. 5.4 engine and I am getting a P0174 code only. Never a P0171, just the 174. Lean bank 2. I have checked all of my vacuum hoses, cleaned the MAF sensor, replaced PCV, replaced fuel filter and sprayed all over engine (especially intake manifold) with carb cleaner., 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 ..., The excess air causes the fuel trim table to shift out of limts. This is what sets the code by indirect detection of the fault. The OX sensor is the only way the system has …, P0171 code engine knocking and rough. 2004 4.6l f150. Running rough at idle and not much better when driving. Knocking like a diesel which I am afraid is the dreaded cam phaser or cam roller. It is throwing code P0171 lean condition on bank 1. Changed all the plugs on driver side. Checked all coils and fuel injectors on driver side. Replaced Egr., Based on the information you have provided, it sounds like the following problems may be causing the codes P0171, P0174, P0402, and P1504 on your 2001 F150 5.4: A vacuum leak. This can cause the engine to run lean, which can lead to the P0171 and P0174 codes. A bad mass airflow sensor (MAF sensor). This sensor measures the amount of air ..., I solved my notorious P0171 and P0174 codes. I had to replace the little elbow under the intake and clean the PCV valve. I also installed an air/water seperator between the PCV valve and the intake to collect oil. Now I get PO0401. EGR low flow code. I tested the DPFE sensor and it reads the correct range of volts.