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P0171 Diagnostic Trouble Code Discussion for May 2011

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2000 Chevrolet Cavalier 2.4L No Start, Cuts out VIN: 1G1JF52T2Y
P0171: Fuel System Lean (Bank 1). We have a cavalier towed in because it died in motion. customer states car was dying at highway speeds for 2 months but always restarted so he kept on going.now it died on a back road.But when we got it it started and ran good on back roads for 15 miles,but on...
May 04, 2011
1995 Ford Windstar 3.8L MIL Lamp on VIN: 2FMZAS150T
P0171: System too lean bank 1. This van has no drivability problem at all. Customer said MIL came on while pulling a long hill. I have only taken a quick look under the hood yesterday and van will be here today. I will check fuel pressure, vacuum leaks, etc, but is there something common on...
May 04, 2011
2004 Mazda RX-8 1.3L Stall VIN: JM1FE17384
P0171: Adaptive Fuel Trim Too Lean (Bank 1). I have this RX8 running lean at idle only, if i disconnect the MAF sensor car rans great , no missfire.At idle with Maf connected car runs lean,won't idle ,fuel trim goes to +25. I disconnected the O2 sensor to see if it's stuck, but still does the same thing....
May 05, 2011
2004 Chevrolet Express 1500 5.3L MIL Lamp on VIN: 1GCFG15T84
P0171: Fuel Trim System Lean (Bank 1). ... and failed for the mil being on with codes p0174 & p0171. Ive smoke the intake checked all 02 sensors, mass airflow sensor, fuel pressure (i even checked the amps the pump was pulling 9.5amp)and i noticed that intake g...
May 10, 2011
2001 Ford Explorer Sport 4.0L fuel pressure?? VIN: 1FMYU60E41
P0171: Bank 1 lean. Ok, I am stumped. I am looking for the proper fuel pump pressure spec. Mitchell spec. is 60-65 psi koer and koeo. aldata spec is 30-60. If you go back and forward a year you get different info on the spec as well. Also different models (sport/sport trac to jus...
May 10, 2011
2001 Mercury Cougar V6 2.5L Surge VIN: 1ZWFT61L11
P0171: system lean bank 1. Ok I have a problem with this cougar. It came in with a couple of codes. Lean bank 1 and 2 and egr insuffence flow. I check for vacume leaks and I didnt find any. Went and checked the fuel pressure why driving and found the pressure would not go over 40 lbs. S...
May 11, 2011
2006 Land Rover Range Rover HSE 4.4L MIL Lamp on VIN: SALMF15496
P0171: Lean Code - Bank 1. Hello everyone, got this Rover that is giving both lean and rich codes. Smoke test good. Replaced front O2 sensors, still have problem. Replaced MAF, still have problem. Reflash ECU, through dealer, as per tsb's. Still have problem. Fuel Trims: Short are about...
May 12, 2011
2006 Ford Freestar SE 3.9L Hesitation, Misfire, MIL Lamp on VIN: 2FMDA51616
P0171: Lean bank 1. Customer says engine was misfiring,pinging and loss of power.When I first scanned PCM and pulled those codes shown.STFT was +40 to 50% increase on both banks and No LTFT's at all,looked to be disabled? The fuel pump duty cycle is 100% all the time.Fuel pressur...
May 13, 2011
2006 Ford Freestar SE 3.9L Hesitation, Misfire, MIL Lamp on VIN: 2FMDA51616
P0171: Lean bank 1. Customer says engine was misfiring,pinging and loss of power.When I first scanned PCM and pulled those codes shown.STFT was +40 to 50% increase on both banks and No LTFT's at all,looked to be disabled? The fuel pump duty cycle is 100% all the time.Fuel pressur...
May 14, 2011
2006 Mercedes-Benz S430 4.3L Hard start VIN: WDBNG70J76
P0171: Lean bank 1. This vehicle cranks normally but will not start unless you repeatedly pump the throttle. It operates from a timed start switch on the shifter. Once hit it cranks for est. 8-10 seconds. Repeatedly pumping the pedal, on the second or third crank cycle it will fi...
May 14, 2011
2001 Toyota Highlander 3.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: JTEHF21AX1
P0171: Fuel System Too Lean (Bank 1). I group , this truck came in my shop with multiple dtc after than another shop have make the replacement of the timing belt , the belt was broken, and since the this time the truck have thoses dtc. Someone have an idea , the timing seem to be good , but do you...
May 14, 2011
2007 Chevrolet Tahoe LT 5.3L No Start, MIL Lamp on VIN: 1GNFK13067
P0171: Fuel System Lean (Bank 1). tahoe starts and runs fine cold, after driving 10 to 30 miles trac control and stabiatrac warnings come on then check engine light. No drivabily problems just warnings for trac control continue to come on every 5 min, check engine light stays on with codes po1...
May 15, 2011
2001 Toyota Highlander 3.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: JTEHF21AX1
P0171: Fuel System Too Lean (Bank 1). I group , this truck came in my shop with multiple dtc after than another shop have make the replacement of the timing belt , the belt was broken, and since the this time the truck have thoses dtc. Someone have an idea , the timing seem to be good , but do you...
May 15, 2011
2007 Ford Ranger XLT 4.0L MIL Lamp on VIN: 1FTYR44E47
P0171: Bank 1 lean. Hope someone can give me some ideas--this ranger keeps setting lean codes the short term fuel trim starts to climb as soon as the engine runs long trim will climb to 20 just sitting and idling-this is after kam has been reset--smoke tested no leaks found pinch...
May 19, 2011
2000 Chevrolet Cavalier 2.4L No Start, Cuts out VIN: 1G1JF52T2Y
P0171: Fuel System Lean (Bank 1). We have a cavalier towed in because it died in motion. customer states car was dying at highway speeds for 2 months but always restarted so he kept on going.now it died on a back road.But when we got it it started and ran good on back roads for 15 miles,but on...
May 04, 2011
1995 Ford Windstar 3.8L MIL Lamp on VIN: 2FMZAS150T
P0171: System too lean bank 1. This van has no drivability problem at all. Customer said MIL came on while pulling a long hill. I have only taken a quick look under the hood yesterday and van will be here today. I will check fuel pressure, vacuum leaks, etc, but is there something common on...
May 04, 2011
2004 Mazda RX-8 1.3L Stall VIN: JM1FE17384
P0171: Adaptive Fuel Trim Too Lean (Bank 1). I have this RX8 running lean at idle only, if i disconnect the MAF sensor car rans great , no missfire.At idle with Maf connected car runs lean,won't idle ,fuel trim goes to +25. I disconnected the O2 sensor to see if it's stuck, but still does the same thing....
May 05, 2011
2004 Chevrolet Express 1500 5.3L MIL Lamp on VIN: 1GCFG15T84
P0171: Fuel Trim System Lean (Bank 1). ... and failed for the mil being on with codes p0174 & p0171. Ive smoke the intake checked all 02 sensors, mass airflow sensor, fuel pressure (i even checked the amps the pump was pulling 9.5amp)and i noticed that intake g...
May 10, 2011
2001 Ford Explorer Sport 4.0L fuel pressure?? VIN: 1FMYU60E41
P0171: Bank 1 lean. Ok, I am stumped. I am looking for the proper fuel pump pressure spec. Mitchell spec. is 60-65 psi koer and koeo. aldata spec is 30-60. If you go back and forward a year you get different info on the spec as well. Also different models (sport/sport trac to jus...
May 10, 2011
2001 Mercury Cougar V6 2.5L Surge VIN: 1ZWFT61L11
P0171: system lean bank 1. Ok I have a problem with this cougar. It came in with a couple of codes. Lean bank 1 and 2 and egr insuffence flow. I check for vacume leaks and I didnt find any. Went and checked the fuel pressure why driving and found the pressure would not go over 40 lbs. S...
May 11, 2011
2006 Land Rover Range Rover HSE 4.4L MIL Lamp on VIN: SALMF15496
P0171: Lean Code - Bank 1. Hello everyone, got this Rover that is giving both lean and rich codes. Smoke test good. Replaced front O2 sensors, still have problem. Replaced MAF, still have problem. Reflash ECU, through dealer, as per tsb's. Still have problem. Fuel Trims: Short are about...
May 12, 2011
2006 Ford Freestar SE 3.9L Hesitation, Misfire, MIL Lamp on VIN: 2FMDA51616
P0171: Lean bank 1. Customer says engine was misfiring,pinging and loss of power.When I first scanned PCM and pulled those codes shown.STFT was +40 to 50% increase on both banks and No LTFT's at all,looked to be disabled? The fuel pump duty cycle is 100% all the time.Fuel pressur...
May 13, 2011
2006 Ford Freestar SE 3.9L Hesitation, Misfire, MIL Lamp on VIN: 2FMDA51616
P0171: Lean bank 1. Customer says engine was misfiring,pinging and loss of power.When I first scanned PCM and pulled those codes shown.STFT was +40 to 50% increase on both banks and No LTFT's at all,looked to be disabled? The fuel pump duty cycle is 100% all the time.Fuel pressur...
May 14, 2011
2006 Mercedes-Benz S430 4.3L Hard start VIN: WDBNG70J76
P0171: Lean bank 1. This vehicle cranks normally but will not start unless you repeatedly pump the throttle. It operates from a timed start switch on the shifter. Once hit it cranks for est. 8-10 seconds. Repeatedly pumping the pedal, on the second or third crank cycle it will fi...
May 14, 2011
2001 Toyota Highlander 3.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: JTEHF21AX1
P0171: Fuel System Too Lean (Bank 1). I group , this truck came in my shop with multiple dtc after than another shop have make the replacement of the timing belt , the belt was broken, and since the this time the truck have thoses dtc. Someone have an idea , the timing seem to be good , but do you...
May 14, 2011
2007 Chevrolet Tahoe LT 5.3L No Start, MIL Lamp on VIN: 1GNFK13067
P0171: Fuel System Lean (Bank 1). tahoe starts and runs fine cold, after driving 10 to 30 miles trac control and stabiatrac warnings come on then check engine light. No drivabily problems just warnings for trac control continue to come on every 5 min, check engine light stays on with codes po1...
May 15, 2011
2001 Toyota Highlander 3.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: JTEHF21AX1
P0171: Fuel System Too Lean (Bank 1). I group , this truck came in my shop with multiple dtc after than another shop have make the replacement of the timing belt , the belt was broken, and since the this time the truck have thoses dtc. Someone have an idea , the timing seem to be good , but do you...
May 15, 2011
2007 Ford Ranger XLT 4.0L MIL Lamp on VIN: 1FTYR44E47
P0171: Bank 1 lean. Hope someone can give me some ideas--this ranger keeps setting lean codes the short term fuel trim starts to climb as soon as the engine runs long trim will climb to 20 just sitting and idling-this is after kam has been reset--smoke tested no leaks found pinch...
May 19, 2011