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P0171 Diagnostic Trouble Code Discussion for May 2014

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2007 GMC Savana 2500 4.8L Misfire VIN: 1GTGG25V87
P0171: Fuel Trim System Lean (Bank 1). We recieved vehicle from customer with misfire. We see mis fire on cyl 7 and cyl 8. It occurs under slight load at aprox 1300 to 1500 Rpm in park and can also be felt driving down the road. We have checked coils and swapped them with known good cylinders. We h...
May 01, 2014
2001 Ford Ranger Edge 4.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 1FTZR15E21
P0171: System lean bank 1. This vehicle has codes P0171 and p0174 system lean bank 1 and bank 2. I have replaced the mass air flow sensor twice and 148 hertz is the highest reading i can get from the baro sensor and sometimes the baro reads as low as 141. I'm at 1900 feet above see leve...
May 06, 2014
2006 GMC Sierra 1500 SLE 5.3L Surge, MIL Lamp on VIN: 2GTEC13Z86
P0171: Fuel Trim System Lean (Bank 1). Well the problem child has these two codes come back within a couple miles sometimes even standing i have replaced intake gaskets maf to no results, smoke test shows almost no leaks tested brake booster blocked of line and smoke tested good results no leaks i ...
May 13, 2014
2006 GMC Sierra 1500 SLE 5.3L Surge, MIL Lamp on VIN: 2GTEC13Z86
P0171: Fuel Trim System Lean (Bank 1). Well the problem child has these two codes come back within a couple miles sometimes even standing i have replaced intake gaskets maf to no results, smoke test shows almost no leaks tested brake booster blocked of line and smoke tested good results no leaks i ...
May 14, 2014
1999 Cadillac Catera 3.0L MIL Lamp on VIN: W06VR52R6X
P0171: Fuel Trim System Lean (Bank 1). dtc's set at freeway speed long term fuel trim goes to positive 25 at freeway speeds both pre cat 02 sensors have been replaced condition still the same fuel pressure within spec fuel filter new no apparent vacuum leak check with smoke and carb cleaner
May 15, 2014
2008 GMC Acadia SLT 3.6L long crank time VIN: 1GKER33798
hey fellow techs customer complains every time she adds gas to the tank the car has a hard time starting. does not matter what amount of gas, this is the only time it has long crank time
May 20, 2014
2006 Chevrolet Equinox LT 3.4L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 2CND173F36
P0171: Fuel Trim System Lean (Bank 1). Have this Equinox with P0171 and P0300 in shop. Spark is good, fuel pressure is good, fuel injectors are good. Smoke tested, PCV hose was leaking heavily. Both PCV hoses were replaced, and I no longer see any leaks. Codes set at 203 degrees F, 850 rpm, -100% f...
May 23, 2014
1998 Toyota Camry CE 3.0L MIL Lamp on VIN: 4T1BF22K9W
P0171: Fuel System Too Lean (Bank 1). When car came in for cat/front pipe assembly replacement(flex section rotted),i thought it was kind of strangr for the check engine light to not be on with a major exhaust leak like it had.anyway,replaced pipe and all three gaskets as requested.customer drove ...
May 23, 2014
2000 Nissan Sentra GXE 1.8L Poor Idle Quality, Surge, Cuts out, Stall, MIL Lamp on VIN: 3N1CB51D9Y
P0171: Fuel Trim Lean (Bank 1). ... this and for any help or insight you can offer. After replacing the upstream O2 sensors and the front pipe, found car runs just as bad. It has a slight surge at idle, it will smooth out briefly at times. Sometimes may surge and idle down enough to stall. L...
May 26, 2014
2000 Toyota Corolla VE 1.8L MIL Lamp on VIN: 1NXBR12E4Y
P0171: Fuel System Too Lean (Bank 1). the o2 sensor voltage stays the same at idle and when I give it gas to about 2000 rpm the voltage moves around like it should
May 27, 2014
2003 Suzuki Aerio SX 2.0L Poor Idle Quality, Surge, Misfire VIN: JS2RC41H13
P0171: Fuel System Too Lean (Bank 1). ... came in with very high idle like 3000 RPMs, the owner tried to fix it, he mesed up the timing, TPS sensor, and idle screw, he instslled a new MAF sensor, he made a gasket for the idle motor with paper, anyway we smoked the intake sys. and found leaks in th...
May 29, 2014
2009 Pontiac G3 1.6L Poor Idle Quality, Hesitation VIN: KL2TD66E39
P0171: lean. runs poor on cold starts (no vac ) after about 1 min idles ok but wont accel properly
May 30, 2014