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P0171 Diagnostic Trouble Code Discussion for December 2010

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2002 Jaguar XKR 4.0L MIL Lamp on VIN: SAJDA42B72
P0171: Bank 1 lean. Customer States from time to time check engine light comes on with rest. performance warning. Vehicle runs ok. Po171 fault comes on. Perform vaccumn leak test, no leaks had been found. Air filter and air intake L tube ok. Please Advise. Thank you for your help
December 12, 2010
2004 Jaguar XJ8 4.2L MIL Lamp on VIN: SAJWA71CX4
P0171: Lean bank 1. ... issues.retrieved dtc p0171 (lean bank 1). Oxygen sensors switching normally. Not much disparity between short and long fuel trims bank to bank. Suspect bank two would flag soon. Long fuel trims 8-9% at idle, approx 18% at 70 mph cruise. Checked cold engine...
December 14, 2010
2001 Ford Expedition Eddie Bauer 5.4L MIL Lamp on VIN: 1FMPU18L81
P0171: bank 1 lean. truck arrived with p0171 & p0174 it had very low fuel pressure and would barely stay running, after the pump and filter were replaced it seemed happy and was returned to the owner only to have both codes return within 500 miles. our tech line suggested the...
December 17, 2010
2006 Ford F-150 FX4 5.4L Hesitation, Misfire, Poor Fuel Economy VIN: 1FTPWO45X6
P0171: bank 1 lean. Well, i am stumped on this one. This vehicle has a stumble on medium to hard acceleration when vehicle is warmed up. Another shop installed a torque converter thinking it was a lockup issue. Not sure what their reasoning was, but it did not fix the problem. I ...
December 20, 2010
2002 Chevrolet Silverado 1500 5.3L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 2GCEK19T72
P0171: Fuel Trim System Lean (Bank 1). This vehicle has a terrible miss upon cold start below 45 degrees. It will miss,load up,stall and run terrible til it is warmed up. Looking at the misfire counter it shows all cylinders missing until it gets to operating temp. This truck has done this for the ...
December 23, 2010
2006 Hyundai Tucson GLS 2.7L MIL Lamp on VIN: KM8JN72D46
P0171: Fuel System Too Lean (Bank 1). Robert said there is a bulletin about a cone in the air filter this car doesn't have one and all air tubes are clear This is a re-post of the same car with errors corrected as to VIN and it IS a 6cyl
December 30, 2010
1996 Ford F-150 XL 4.9L MIL Lamp on VIN: 1FTEF15Y3T
P0171: system too lean bank one. thanks for all your help in advance and Happy New Year This vehice is one of my very good customers. when vehicle has a hot soak maybe 15 minutes it will not start. it trys to start, but just stumbles. when it cools off it starts fine. to me it seems like a fu...
December 31, 2010
2002 Jaguar XKR 4.0L MIL Lamp on VIN: SAJDA42B72
P0171: Bank 1 lean. Customer States from time to time check engine light comes on with rest. performance warning. Vehicle runs ok. Po171 fault comes on. Perform vaccumn leak test, no leaks had been found. Air filter and air intake L tube ok. Please Advise. Thank you for your help
December 12, 2010
2004 Jaguar XJ8 4.2L MIL Lamp on VIN: SAJWA71CX4
P0171: Lean bank 1. ... issues.retrieved dtc p0171 (lean bank 1). Oxygen sensors switching normally. Not much disparity between short and long fuel trims bank to bank. Suspect bank two would flag soon. Long fuel trims 8-9% at idle, approx 18% at 70 mph cruise. Checked cold engine...
December 14, 2010
2001 Ford Expedition Eddie Bauer 5.4L MIL Lamp on VIN: 1FMPU18L81
P0171: bank 1 lean. truck arrived with p0171 & p0174 it had very low fuel pressure and would barely stay running, after the pump and filter were replaced it seemed happy and was returned to the owner only to have both codes return within 500 miles. our tech line suggested the...
December 17, 2010
2006 Ford F-150 FX4 5.4L Hesitation, Misfire, Poor Fuel Economy VIN: 1FTPWO45X6
P0171: bank 1 lean. Well, i am stumped on this one. This vehicle has a stumble on medium to hard acceleration when vehicle is warmed up. Another shop installed a torque converter thinking it was a lockup issue. Not sure what their reasoning was, but it did not fix the problem. I ...
December 20, 2010
2002 Chevrolet Silverado 1500 5.3L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 2GCEK19T72
P0171: Fuel Trim System Lean (Bank 1). This vehicle has a terrible miss upon cold start below 45 degrees. It will miss,load up,stall and run terrible til it is warmed up. Looking at the misfire counter it shows all cylinders missing until it gets to operating temp. This truck has done this for the ...
December 23, 2010
2006 Hyundai Tucson GLS 2.7L MIL Lamp on VIN: KM8JN72D46
P0171: Fuel System Too Lean (Bank 1). Robert said there is a bulletin about a cone in the air filter this car doesn't have one and all air tubes are clear This is a re-post of the same car with errors corrected as to VIN and it IS a 6cyl
December 30, 2010
1996 Ford F-150 XL 4.9L MIL Lamp on VIN: 1FTEF15Y3T
P0171: system too lean bank one. thanks for all your help in advance and Happy New Year This vehice is one of my very good customers. when vehicle has a hot soak maybe 15 minutes it will not start. it trys to start, but just stumbles. when it cools off it starts fine. to me it seems like a fu...
December 31, 2010