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P0171 Diagnostic Trouble Code Discussion for July 2011

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2000 Chevrolet Express 3500 LS 5.7L Hesitation, MIL Lamp on VIN: 1GAHG39R4Y
P0171: Fuel Trim System Lean (Bank 1). ... lift for my son . here is what is going on .to day c e l lite came on pulled codes p0171 p0174 lean bank 1 and lean bank 2 pulled freeze frame data fuel trims st term bank 1 -35 bank 2 -35 lt trims 17 bank one bank 2 17 th...
July 04, 2011
2006 Ford Taurus SEL 3.0L Poor Idle Quality, MIL Lamp on VIN: JFAFP56U16
P0171: Fuel system lean bank 1. Hello to all you ford techs out there i got a 2006 taurus giving me fits. It comes in with a lean code on bank one. I check fuel trims bank 1 st ft is -17 and lt fuel trims is +23. I replaced the bank 1 o2 becuse it was laying down, reset fuel trims. And on st...
July 15, 2011
2001 Toyota Celica GT 1.8L Hesitation, Stall, Misfire, MIL Lamp on VIN: JTDDR32T21
P0171: Fuel System Too Lean (Bank 1). This car is killing us! Runs lean, has no power, runs like clogged exhaust. Backpressure is nill, vacuum seems a little lower, but not crazy. 18" and steady. Car has a new MAF, same results. NEW fuel injectors...same results. NEW O2 sensor, SAME. LTFT is +...
July 15, 2011
2001 Nissan Sentra SE 2.0L Poor Idle Quality, Hesitation, Stall, Misfire VIN: 3N1BB51D91
P0171: Fuel Trim Lean. ... sluggish feeling when acclerating. Engine light was not on but scanned for codes anyways - P0300 and P0171. Did not find any misfires and system is not running lean. Tried replacing front o2 sensor but did not affect it. Tested...
July 16, 2011
2001 Toyota Celica GT 1.8L Hesitation, Stall, Misfire, MIL Lamp on VIN: JTDDR32T21
P0171: Fuel System Too Lean (Bank 1). This car is killing us! Runs lean, has no power, runs like clogged exhaust. Backpressure is nill, vacuum seems a little lower, but not crazy. 18" and steady. Car has a new MAF, same results. NEW fuel injectors...same results. NEW O2 sensor, SAME. LTFT is +...
July 17, 2011
2008 GMC Yukon SLT 5.3L Surge, Cuts out, Misfire VIN: 1GKFK130X8
P0171: bank 1 lean. ... had vehicle at dealership where they replaced Fuel Volume balance module and reflash PCM. Problem is re-occuring, but is intermittent. Pulled codes and had P0171, p0174 and p0300. Vehicle is ...
July 19, 2011
2008 GMC Yukon SLT 5.3L Surge, Cuts out, Misfire VIN: 1GKFK130X8
P0171: bank 1 lean. ... had vehicle at dealership where they replaced Fuel Volume balance module and reflash PCM. Problem is re-occuring, but is intermittent. Pulled codes and had P0171, p0174 and p0300. Vehicle is ...
July 20, 2011
1996 Ford Mustang GT 4.6L Surge, MIL Lamp on VIN: 1FELP42X7T
P0171: Too lean bank 1. Vehicle came in bucking under any load. Light, or heavy, didn't matter. Tested fuel pressure, in spec. Tested maf, low readings. Cleaned, readings went over 100 gpm. Found plugs worn out, wires factory, fuel filter factory, air filter plugged. Changed all tune...
July 21, 2011
1999 Toyota Sienna LE 3.0L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire VIN: 4T3ZF13C8X
P0171: Fuel System Too Lean (Bank 1). we have checked and replaced coils injectors igniter crank and cam shaft sensors
July 21, 2011
1999 Ford Explorer XLT 4.0L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1FMZU34E2X
P0171: bank 1 lean. I have a 1999 explorer with a p0171 and p0175. Engine runs rough and lacks power. I cleaned and swapped the MAF with a know good part, no change in the way the engine ran. Smoke tested, no leaks found other than some smoke from the EGR. Both front O2 sensors s...
July 23, 2011
1996 Ford Mustang GT 4.6L Surge, MIL Lamp on VIN: 1FELP42X7T
P0171: Too lean bank 1. Vehicle came in bucking under any load. Light, or heavy, didn't matter. Tested fuel pressure, in spec. Tested maf, low readings. Cleaned, readings went over 100 gpm. Found plugs worn out, wires factory, fuel filter factory, air filter plugged. Changed all tune...
July 25, 2011
2003 Toyota Corolla CE 1.8L Poor Idle Quality VIN: 1NXBR43E23
P0171: Fuel System Too Lean (Bank 1). hey whats up guys im having trouble with this toyota, the car came in with all these codes, i decided to check fuel system , had a bad fuel pump. check it with scope bad waveform, but the car still runs really bad on idle , [...] at 0volts both all the time , ...
July 26, 2011
2001 Nissan Sentra SE 2.0L Poor Idle Quality, Hesitation, Stall, Misfire VIN: 3N1BB51D91
P0171: Fuel Trim Lean. ... sluggish feeling when acclerating. Engine light was not on but scanned for codes anyways - P0300 and P0171. Did not find any misfires and system is not running lean. Tried replacing front o2 sensor but did not affect it. Tested...
July 27, 2011
2000 Chevrolet Express 3500 LS 5.7L Hesitation, MIL Lamp on VIN: 1GAHG39R4Y
P0171: Fuel Trim System Lean (Bank 1). ... lift for my son . here is what is going on .to day c e l lite came on pulled codes p0171 p0174 lean bank 1 and lean bank 2 pulled freeze frame data fuel trims st term bank 1 -35 bank 2 -35 lt trims 17 bank one bank 2 17 th...
July 04, 2011
2006 Ford Taurus SEL 3.0L Poor Idle Quality, MIL Lamp on VIN: JFAFP56U16
P0171: Fuel system lean bank 1. Hello to all you ford techs out there i got a 2006 taurus giving me fits. It comes in with a lean code on bank one. I check fuel trims bank 1 st ft is -17 and lt fuel trims is +23. I replaced the bank 1 o2 becuse it was laying down, reset fuel trims. And on st...
July 15, 2011
2001 Toyota Celica GT 1.8L Hesitation, Stall, Misfire, MIL Lamp on VIN: JTDDR32T21
P0171: Fuel System Too Lean (Bank 1). This car is killing us! Runs lean, has no power, runs like clogged exhaust. Backpressure is nill, vacuum seems a little lower, but not crazy. 18" and steady. Car has a new MAF, same results. NEW fuel injectors...same results. NEW O2 sensor, SAME. LTFT is +...
July 15, 2011
2001 Nissan Sentra SE 2.0L Poor Idle Quality, Hesitation, Stall, Misfire VIN: 3N1BB51D91
P0171: Fuel Trim Lean. ... sluggish feeling when acclerating. Engine light was not on but scanned for codes anyways - P0300 and P0171. Did not find any misfires and system is not running lean. Tried replacing front o2 sensor but did not affect it. Tested...
July 16, 2011
2001 Toyota Celica GT 1.8L Hesitation, Stall, Misfire, MIL Lamp on VIN: JTDDR32T21
P0171: Fuel System Too Lean (Bank 1). This car is killing us! Runs lean, has no power, runs like clogged exhaust. Backpressure is nill, vacuum seems a little lower, but not crazy. 18" and steady. Car has a new MAF, same results. NEW fuel injectors...same results. NEW O2 sensor, SAME. LTFT is +...
July 17, 2011
2008 GMC Yukon SLT 5.3L Surge, Cuts out, Misfire VIN: 1GKFK130X8
P0171: bank 1 lean. ... had vehicle at dealership where they replaced Fuel Volume balance module and reflash PCM. Problem is re-occuring, but is intermittent. Pulled codes and had P0171, p0174 and p0300. Vehicle is ...
July 19, 2011
2008 GMC Yukon SLT 5.3L Surge, Cuts out, Misfire VIN: 1GKFK130X8
P0171: bank 1 lean. ... had vehicle at dealership where they replaced Fuel Volume balance module and reflash PCM. Problem is re-occuring, but is intermittent. Pulled codes and had P0171, p0174 and p0300. Vehicle is ...
July 20, 2011
1996 Ford Mustang GT 4.6L Surge, MIL Lamp on VIN: 1FELP42X7T
P0171: Too lean bank 1. Vehicle came in bucking under any load. Light, or heavy, didn't matter. Tested fuel pressure, in spec. Tested maf, low readings. Cleaned, readings went over 100 gpm. Found plugs worn out, wires factory, fuel filter factory, air filter plugged. Changed all tune...
July 21, 2011
1999 Toyota Sienna LE 3.0L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire VIN: 4T3ZF13C8X
P0171: Fuel System Too Lean (Bank 1). we have checked and replaced coils injectors igniter crank and cam shaft sensors
July 21, 2011
1999 Ford Explorer XLT 4.0L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1FMZU34E2X
P0171: bank 1 lean. I have a 1999 explorer with a p0171 and p0175. Engine runs rough and lacks power. I cleaned and swapped the MAF with a know good part, no change in the way the engine ran. Smoke tested, no leaks found other than some smoke from the EGR. Both front O2 sensors s...
July 23, 2011
1996 Ford Mustang GT 4.6L Surge, MIL Lamp on VIN: 1FELP42X7T
P0171: Too lean bank 1. Vehicle came in bucking under any load. Light, or heavy, didn't matter. Tested fuel pressure, in spec. Tested maf, low readings. Cleaned, readings went over 100 gpm. Found plugs worn out, wires factory, fuel filter factory, air filter plugged. Changed all tune...
July 25, 2011
2003 Toyota Corolla CE 1.8L Poor Idle Quality VIN: 1NXBR43E23
P0171: Fuel System Too Lean (Bank 1). hey whats up guys im having trouble with this toyota, the car came in with all these codes, i decided to check fuel system , had a bad fuel pump. check it with scope bad waveform, but the car still runs really bad on idle , [...] at 0volts both all the time , ...
July 26, 2011
2001 Nissan Sentra SE 2.0L Poor Idle Quality, Hesitation, Stall, Misfire VIN: 3N1BB51D91
P0171: Fuel Trim Lean. ... sluggish feeling when acclerating. Engine light was not on but scanned for codes anyways - P0300 and P0171. Did not find any misfires and system is not running lean. Tried replacing front o2 sensor but did not affect it. Tested...
July 27, 2011