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P0171 Diagnostic Trouble Code Discussion for September 2012

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2007 Dodge Caliber SXT 2.0L MIL Lamp on VIN: 1B3HB48B97
P0171: Fuel System Lean. Car came in check engine light on P0171. Replace MAP sensor with factory part, smoked engine, checked exhaust, thermostat working properly, LTFT stuck on 30. Stays the same at idle or under accel or cruise. STFT is close to 0. Any ideas would be appreciated. T...
September 04, 2012
2005 Ford Focus ZX3 2.0L Poor Idle Quality, MIL Lamp on VIN: 3FAFP31N65
P0171: lean code. was stalling but seems to be better after egr install, sometimes the idle is a little flucuating but not bad most of the time. long trim 25 at idle but looks good off idle down around 5 or below
September 06, 2012
2005 Ford F-250 Super Duty Lariat 5.4L Poor Fuel Economy, MIL Lamp on VIN: 1FTSW215X5
P0171: system too lean bank 1. customer complains of MIL light on and poor fuel economy. scanner shows both banks too lean codes. Diagnostic steps I have performed so far... -datastream shows both bank LT fuel trims pegged at +30. as soon as you increase the rpm to anything above idle LT t...
September 07, 2012
2004 Toyota 4Runner Sport 4.0L Poor Idle Quality, MIL Lamp on VIN: JTEBU14R64
P0171: Fuel System Too Lean (Bank 1). hello friends, have a reocuring but intermittent fault with v6 4.0l lean bank 1 usually occurs at idle after driving on freeway come to stop and the idle will start to shake after about i minute, the mil will set,the engine does not stall, if you accelarate fr...
September 09, 2012
2004 Mazda 6 S 3.0L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1YVHP80D84
P0171: Adaptive Fuel Trim Too Lean (Bank 1). ... and flashing. Before i road test, oil was all over engine, check oil dipstick, no oil regestering. Add 4 quarts of oil, customer said oil cap was left off after oil change was done at a quick place. Started engine and heard what sounded like the timing cha...
September 10, 2012
2005 Audi A8 Quattro L 4.2L MIL Lamp on VIN: WAUML44E55
P0171: lean bank one. ... P0174 lean on both banks,plus P1136 and P1138 also lean codes respectively During smoke test we noticed smoke pouring out of air injection secondary valve(according to Mitchels that's what it is)located on the back of the in...
September 13, 2012
2000 Infiniti G20 2.0L Poor Idle Quality, Stall VIN: JNKCP11A8Y
P0171: Fuel Trim Lean (Bank 1). ... stops. Vehicle came in with a defective MAF sensor and MAF code. we had put one on in April and it was outputting 5v even with engine not running. After repair (with NAPA warranty part) voltage was 1.3v at idle and goes up with rpm. P0171 appeared for a l...
September 13, 2012
2006 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: 1G1AK15F46
P0171: Fuel System Lean. This one is silly. I believe I covered all the bases here. I also replaced intake manifold gaskets/o-rings and filled intake with gas{out of the car of course ) no cracks or leaks found. Air inlet tube checks out good also.MAP/BARO pressure sensor seems to wor...
September 20, 2012
2006 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: 1G1AK15F46
P0171: Fuel System Lean. This one is silly. I believe I covered all the bases here. I also replaced intake manifold gaskets/o-rings and filled intake with gas{out of the car of course ) no cracks or leaks found. Air inlet tube checks out good also.MAP/BARO pressure sensor seems to wor...
September 21, 2012
2002 Chevrolet Silverado 2500 6.0L MIL Lamp on VIN: 1GCHK24U22
P0171: Fuel Trim System Lean (Bank 1). Hi this truck came in with a double lean code cked fuel presure was low 48 psi tested and replaced fule presure reg and filter now I have 59psi code all 3 comes back long trims are at plus 25 checked for vac leak none found did see tsb for P0332 but cant see...
September 26, 2012
2007 Dodge Caliber SXT 2.0L MIL Lamp on VIN: 1B3HB48B97
P0171: Fuel System Lean. Car came in check engine light on P0171. Replace MAP sensor with factory part, smoked engine, checked exhaust, thermostat working properly, LTFT stuck on 30. Stays the same at idle or under accel or cruise. STFT is close to 0. Any ideas would be appreciated. T...
September 04, 2012
2005 Ford Focus ZX3 2.0L Poor Idle Quality, MIL Lamp on VIN: 3FAFP31N65
P0171: lean code. was stalling but seems to be better after egr install, sometimes the idle is a little flucuating but not bad most of the time. long trim 25 at idle but looks good off idle down around 5 or below
September 06, 2012
2005 Ford F-250 Super Duty Lariat 5.4L Poor Fuel Economy, MIL Lamp on VIN: 1FTSW215X5
P0171: system too lean bank 1. customer complains of MIL light on and poor fuel economy. scanner shows both banks too lean codes. Diagnostic steps I have performed so far... -datastream shows both bank LT fuel trims pegged at +30. as soon as you increase the rpm to anything above idle LT t...
September 07, 2012
2004 Toyota 4Runner Sport 4.0L Poor Idle Quality, MIL Lamp on VIN: JTEBU14R64
P0171: Fuel System Too Lean (Bank 1). hello friends, have a reocuring but intermittent fault with v6 4.0l lean bank 1 usually occurs at idle after driving on freeway come to stop and the idle will start to shake after about i minute, the mil will set,the engine does not stall, if you accelarate fr...
September 09, 2012
2004 Mazda 6 S 3.0L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1YVHP80D84
P0171: Adaptive Fuel Trim Too Lean (Bank 1). Vehicle came in with s.e.s. Light on and flashing. Before i road test, oil was all over engine, check oil dipstick, no oil regestering. Add 4 quarts of oil, customer said oil cap was left off after oil change was done at a quick place. Started engine and heard...
September 10, 2012
2005 Audi A8 Quattro L 4.2L MIL Lamp on VIN: WAUML44E55
P0171: lean bank one. ... P0174 lean on both banks,plus P1136 and P1138 also lean codes respectively During smoke test we noticed smoke pouring out of air injection secondary valve(according to Mitchels that's what it is)located on the back of the in...
September 13, 2012
2000 Infiniti G20 2.0L Poor Idle Quality, Stall VIN: JNKCP11A8Y
P0171: Fuel Trim Lean (Bank 1). ... stops. Vehicle came in with a defective MAF sensor and MAF code. we had put one on in April and it was outputting 5v even with engine not running. After repair (with NAPA warranty part) voltage was 1.3v at idle and goes up with rpm. P0171 appeared for a l...
September 13, 2012
2006 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: 1G1AK15F46
P0171: Fuel System Lean. This one is silly. I believe I covered all the bases here. I also replaced intake manifold gaskets/o-rings and filled intake with gas{out of the car of course ) no cracks or leaks found. Air inlet tube checks out good also.MAP/BARO pressure sensor seems to wor...
September 20, 2012
2006 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: 1G1AK15F46
P0171: Fuel System Lean. This one is silly. I believe I covered all the bases here. I also replaced intake manifold gaskets/o-rings and filled intake with gas{out of the car of course ) no cracks or leaks found. Air inlet tube checks out good also.MAP/BARO pressure sensor seems to wor...
September 21, 2012
2002 Chevrolet Silverado 2500 6.0L MIL Lamp on VIN: 1GCHK24U22
P0171: Fuel Trim System Lean (Bank 1). ... lean code cked fuel presure was low 48 psi tested and replaced fule presure reg and filter now I have 59psi code all 3 comes back long trims are at plus 25 checked for vac leak none found did see tsb for P0332 but cant see how that would afect my trims. A...
September 26, 2012