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P0171 Diagnostic Trouble Code Discussion for November 2012

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2003 Ford F-150 XLT 4.6L Misfire, MIL Lamp on VIN: 1FTRW076X3
P0171: lean bank 1. This high mileage vehicle sets a lean code on bank 1 and fuel trims indicate it is lean but no vacuum leaks have been found. There was a misfire code on bank 2 cylinder #6 and the Cylinder contribution function on our Solus indicates that there are slight misf...
November 01, 2012
2002 Ford F-150 Harley-Davidson Edition 5.4L MIL Lamp on VIN: 1FTRW07382
P0171: System too lean Bank 1. We know the lean codes are due to PCV hose swelling up. I checked identifx and noticed that it is a common problem with this vehicle. Does anyone know why the PCV hose swells up as often as it does? Any infomation would be great. Thank you
November 02, 2012
2008 Jeep Liberty Sport 3.7L Misfire VIN: 1J8GN28K28
P0171: Lean. I am out on holidays and got roped into this. Jeep has a slight hesitation was worse before plugs were replaced. Code 0300 comes back fairly soon after being cleared. Thanks for taking the time to help
November 04, 2012
2003 Dodge Durango SLT 4.7L MIL Lamp on VIN: 1D4HS48NX3
P0171: Fuel System Lean (Bank 1). ... new longblock was installed. After install and break-in of engine, the vehicle test drove great. After multiple key/drive cycles, a p0171 code was set. Fuel pressure good, O2 switches correctly, and followed the rest of the factory diag procedure for this ...
November 07, 2012
1998 Ford Expedition Eddie Bauer 4.6L MIL Lamp on VIN: 1FMRU18W5W
P0171: System lean bank 1. This vehicle is driving me nuts!after finding the very common problem of the cracked pcv hose on the rear of the intake,and replacing the hose and tightening up a couple of other connections,this expedition still is setting the lean codes.i have smoke tested i...
November 11, 2012
2008 Jeep Liberty Sport 3.7L Misfire VIN: 1J8GN28K28
P0171: Lean. I am out on holidays and got roped into this. Jeep has a slight hesitation was worse before plugs were replaced. Code 0300 comes back fairly soon after being cleared. Thanks for taking the time to help
November 13, 2012
1997 Nissan Altima GLE 2.4L MIL Lamp on VIN: 1N4BU31D6V
P0171: Fuel Trim Lean (Bank 1). ... cylinder found a large vacuum leak at the intake manifold,fix the leak reset code p0304 and now i have a code p0171,coming on after driving vehicle for 50 miles,I already tried to find another vacuum leak but vehicle is running smooth and no vacuum leaks, ...
November 13, 2012
2004 Ford Mustang 3.8L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1FAFP40414
P0171: bank 1 lean. This car came in with a surging idle and intermittently stalled at idle. I have checked the maf sensor seems to be good. the egr is closed at idle and dosent seem to be sticking open. I have smoked tested several times both cold and hot found no leaks. Checked...
November 14, 2012
2004 Ford Mustang 3.8L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1FAFP40414
P0171: bank 1 lean. This car came in with a surging idle and intermittently stalled at idle. I have checked the maf sensor seems to be good. the egr is closed at idle and dosent seem to be sticking open. I have smoked tested several times both cold and hot found no leaks. Checked...
November 15, 2012
1998 Ford Ranger Splash 4.0L MIL Lamp on VIN: 1FTYR14XXW
P0171: lean. hello techs , have this ranger customer said last week went to start it cold and the tach.would not work then it would stick at 2,000 rpm , the engine would rev ok , i could not get it to act up,also they said the check engine light went on at the same time, i...
November 19, 2012
2008 Ford Taurus SEL 3.5L running lean VIN: 1FAHP24W28
P0171: system too lean bank 1. hi this car has both lean codes i have changed the ocv valve because i have found no other problems stfuel trims are very irattic swinging from 0 to 20 and lgterm fuel trims are at 25.8 percent on both banks i have reset the kam memory to reset long term fuel ...
November 26, 2012
2008 Ford Taurus SEL 3.5L running lean VIN: 1FAHP24W28
P0171: system too lean bank 1. hi this car has both lean codes i have changed the ocv valve because i have found no other problems stfuel trims are very irattic swinging from 0 to 20 and lgterm fuel trims are at 25.8 percent on both banks i have reset the kam memory to reset long term fuel ...
November 27, 2012