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P0171 Diagnostic Trouble Code Discussion for December 2005

Fuel System Lean (Bank 1) *

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Trouble Ticket Help Requests for DTC P0171

	Help Request	Posted
	2000 Ford E-250 Econoline 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTNE2422Y P0171: system lean bank 1. van came in with lean codes, cyl #3 missfire code. fuel,ignition,vaccum,compression, injector #3 scope pattern perfect. famous egr problem not the fix. installed factory parts plugs coil pack ig. wires!! still missfire#3 at idle under load any holiday, santa i...	December 01, 2005
	2001 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA51401 P0171: bank 1 lean. hello all. We are an import shop,but this is the managers father-in-law. I am limited on the info I can get.I am using older knowledge on this one. This is driving me crazy. It takes a couple of days to set the codes.I have checked for vaccuum leaks with carb...	December 01, 2005
	1998 Ford F-150 XL 4.2L No Start, MIL Lamp on, no power VIN: 1FTZF172XW P0171: bank 1 lean. Hey guys, thanks in advance for any help with this one. The truck came into a trans shop for not going above 60 mph. they drove it and said it is an eng problem and sent it to us. the cust pushed it here(trans shop is shared building)the truck is very hard to ...	December 02, 2005
	1998 Mercury Mountaineer 4.0L Poor Idle Quality, Cuts out, Stall, Poor Fuel Economy, MIL Lamp on VIN: 4M2ZU54E4W P0171: system too lean B1. The truck sat for 2 years after it was hit in the D/S front then it was fixed and it was running bad and not wanting to idle the body shop replaced the spark plugs and wires. I then got the truck it had mis fire code for every cylinder and the Po171 and P0174,...	December 06, 2005
	1997 Ford Ranger XLT 4.0L Stall, MIL Lamp on VIN: 1FTDR15X0V P0171: lean bank 1. Vehicle stalls very intermitantly. I know the vac leak can and will cause the stalling issue. My concern is that while looking at the PID data on the NGS the CSE GND PID shows 2.38 volts or so, varies by only a few hundredths of a volt. I have checked for volt...	December 09, 2005
	2000 Ford Explorer XLT 4.0L MIL Lamp on VIN: 1FMZU73X6Y P0171: bank 1 system too lean. hello techs I got this ford in my building in which I do not work on. I do mainly v/ws and audi. Any way it had these lean codes po174b and po171b both 1,2 banks for running lean. This car runs great it has no visible problems other than the codes . I smoke ck...	December 12, 2005
	2000 Ford Windstar LX 3.8L Poor Idle Quality, Hesitation, Surge, MIL Lamp on VIN: 2FMZA514XY P0171: bank 1 too lean. This van has PO 171 bank 1 too lean and a PO174 bank 2 too lean codes, and the idle flucuates up and down on cold starts and if you try to accelerate too quickly it will hesitate and sometimes stall. It seems to me like there was a problem with intake gaskets ...	December 13, 2005
	1998 Ford Windstar GL 3.8L monitors not reset VIN: 2FMZA5148W P0171: replaced HO21S. ... This came in with a miss and a Code P0171 but after inspection, I decided to change the tune up since there is 116K on the clock with the original factory tune up. After this, I cleared the code for the HO2S was within Para...	December 14, 2005
	1996 Oldsmobile 88 Royale 3.8L Misfire, MIL Lamp on VIN: 1G3HN52K2T P0171: Fuel System Lean. This car came in with two codes. P0171 and P0300. When you drive the car it will run fine for a few minuets than starts to loose power and will pop occasionally at speed under load.. Like it's lean. I drove the car with my fuel pressure gauge taped tothe winds...	December 18, 2005
	2002 Ford F-150 XL 4.2L MIL Lamp on VIN: 3FTRF17222 vehicle came in with check engine light on. po171 & po174 stored in memory. iac was at 52% really high. and baro pid was at 167hz. to high for this area. so we replaced the maf sensor and did an air induction service. baro pid was back to normal and iac ba...	December 20, 2005
	2000 Volkswagen Golf GLS 2.0L MIL Lamp on VIN: 9BWGA21JXY P0171: lean running condition. This vehicle sets a P0171 - after 2 repair attempts. Freeze frame indicated - 794 rpms, 88C, stft at 1%, and ltft at -4%, at 0 mph. Both O2s have heater 13 ohms resistances with 12v applied and pulsed grounds at approx 70% on time. the strange thing here is, ...	December 20, 2005
	2001 Audi A4 1.8L no power VIN: WAUDC68D41 P0171: lean o2. This car has no power. Almost like the turbo starts to work, then it just dies out, like there is no turbo. At times it will start to work for a few minuts and it has all kinds of power. I also removed the cat converter and road tested without a cat. Still no ...	December 23, 2005
	2004 Chevrolet Impala 3.8L MIL Lamp on VIN: 2G1WF55K84 P0171: Fuel Trim System Lean. hello, i live near chicago where the temp. has been below freezing for the past 30 days.the car came in with a po171 code . the code only set during the first mile of a cold engine start. the stft goes as high as +20 and the ltft is around +18.if i clear the c...	December 23, 2005
	1999 Ford Windstar SE 3.8L Hesitation, Surge VIN: 2FHDA524IX P0171: Bank one system lean. Good morning tecks, this one has been here for weeks now, it is time for it to go, repaired! The PO171/PO174 DTC will come on every 2-3 days. The upper intake gaskets have been replaced during spark plug replacement, the code was there before this was done. ne...	December 26, 2005
	1999 Mercury Cougar 2.5L Poor Idle Quality, MIL Lamp on VIN: 1ZWFT61LXX P0171: bank 1 lean. this one goes out to are ford techs, this car came to me three weeks ago with a rough idle on cold start ups & a check engine light on, the owner starts the car with a remote start to warm up before leaving the house but sometimes when she comes out the ca...	December 27, 2005
	2001 Audi A4 1.8L no power VIN: WAUDC68D41 P0171: lean o2. This car has no power. Almost like the turbo starts to work, then it just dies out, like there is no turbo. At times it will start to work for a few minuts and it has all kinds of power. I also removed the cat converter and road tested without a cat. Still no ...	December 28, 2005
	2002 Chevrolet Tahoe LS 5.3L Poor Idle Quality, MIL Lamp on VIN: 1GNEK13Z42 P0171: Fuel Trim System Lean (Bank 1). Problem occurs when vehicle is cold. Upon a cold start, vehicle's idle will fluctuate and feel as though it is going to stall. Customer states vehicle seemed to run slightly better after having above repairs performed. However, it is difficult to determine if ...	December 28, 2005
	1999 Ford F-150 4.2L Hesitation, Misfire VIN: 1FTZ1729XK P0171: system to lean b1. costumer complant lag power miss out check pugs replaced check codes, check mas air flow sensor with lab scope snap throttle to wide open,won't go over 3. volts cleaned some replaced a little better my consern is scanner shows mas sensor @@52g/s at 2.34 volts ...	December 28, 2005
	1999 Ford Windstar SE 3.8L Hesitation, Surge VIN: 2FHDA524IX P0171: Bank one system lean. Good morning tecks, this one has been here for weeks now, it is time for it to go, repaired! The PO171/PO174 DTC will come on every 2-3 days. The upper intake gaskets have been replaced during spark plug replacement, the code was there before this was done. ne...	December 28, 2005
	1999 Mercury Cougar 2.5L Poor Idle Quality, MIL Lamp on VIN: 1ZWFT61LXX P0171: bank 1 lean. this one goes out to are ford techs, this car came to me three weeks ago with a rough idle on cold start ups & a check engine light on, the owner starts the car with a remote start to warm up before leaving the house but sometimes when she comes out the ca...	December 28, 2005