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P0171 Diagnostic Trouble Code Discussion for August 2007

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2005 Ford F-150 King Ranch 5.4L Misfire, MIL Lamp on VIN: 1FTPW12535
P0171: Lean Bank 1. ... present and also P0345 and P0349 related to cam position sensor on bank 2. We replaced VCT solenoid for bank 2 with no difference. We noticed a lot of oil gunk buildup in valve cover and around...
August 03, 2007
2004 Nissan Sentra SE-R 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3N1AB51D94
P0171: Fuel Trim Lean. Hello fellow Nissan Tech's. I have a 04 Sentra SE-R Spec V here that is having some difficulty's. Has very poor idle quality, and will at times stall, i replaced the crank position sensor for the crank code that it was throwing and that code has not since came...
August 04, 2007
2002 Ford Focus LX 2.0L MIL Lamp on VIN: WF0AXXWPDA
P0171: system too lean bank 1. ... diagnostic check showed code p0171 I cleared it and drove the car for a day and mil light returned checked fuel pressure 45psi @ idle replaced fuel filter cleared the light drove the car it came on again after couple off days any suggestions.Thanks in adva...
August 06, 2007
2002 Ford Focus LX 2.0L MIL Lamp on VIN: WF0AXXWPDA
P0171: system too lean bank 1. ... diagnostic check showed code p0171 I cleared it and drove the car for a day and mil light returned checked fuel pressure 45psi @ idle replaced fuel filter cleared the light drove the car it came on again after couple off days any suggestions.Thanks in adva...
August 07, 2007
1999 Suzuki Grand Vitara JLX 2.5L Stall VIN: JS3TD62VXX
P0171: Fuel System Too Lean (Bank 1). ... Suzuki. It has these lean codes.P0171 and P0174. We smoked this engine and see no leaks. We thought it might be an egr valve but it is not it. This vehicle stalls after it has been driven for about half hour. It starts right...
August 09, 2007
1999 Volkswagen Jetta GLS 2.0L Poor Idle Quality VIN: 3VWSA29M3X
P0171: System too lean bank 1. vechicle came to shop for failed smog due to check engine light. found vacuum leaks at line to fuel pressure regulator - replaced, dipstick tube - replaced, and brake booster - replaced. Cleared codes and now vehicle is barely driveable ??
August 09, 2007
1997 Ford Expedition XLT 5.4L Excessive Emissions, Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1FNFU18L5V
ses light on steady runs very rich @ idle & will drop out of closed loop @ idle and run realy bad.my question is ect pid will not go over 118 degress cylinder reads about 200 degress iat reads 104 is there a ect & if there is where is it located we hav...
August 16, 2007
2003 Chevrolet Avalanche 1500 5.3L Poor Idle Quality, Surge, Stall VIN: 3GNEK13T62
P0171: Fuel Trim System Lean (Bank 1). Vehicle in for stalling, hard starting and surging/poor idle, backfiring. Codes present as I have listed. Smoked intake manifold and found no leaks other than a wisp from the throttle body. Tourque checked on intake bolts and was good at 10nm. Cant fault intak...
August 22, 2007
1999 Ford Ranger XL 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FTYR11V9X
P0171: lean bank 1. Truck came in with P0171 & P0174 codes. Customer told me motor replaced out og salvage yard recently. Smoked intake and found leaks at gaskets. Replaced upper & lower intake gaskets. Cleared codes test drove and both codes came back. Freeze frame shows...
August 23, 2007
2001 BMW X5 4.4i 4.4L MIL Lamp on, LEAN BANK #1 AND 2 VIN: WBAFB22551
P0171: Bank 1 lean BMW factry code 24 and 26. Hello every on , I have a 2001 BMW X5 4.4L the Check Engine light is on and I got the codes with the Snap On Scanner MT2500 , the code is PO171 and PO174,(BMW factory codes are 24,26,25,27) I cant find the problem, did any one had this trable code or problem b...
August 24, 2007
1999 Ford Ranger XL 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FTYR11V9X
P0171: lean bank 1. Truck came in with P0171 & P0174 codes. Customer told me motor replaced out og salvage yard recently. Smoked intake and found leaks at gaskets. Replaced upper & lower intake gaskets. Cleared codes test drove and both codes came back. Freeze frame shows...
August 24, 2007
2000 Mazda B4000 SE 4.0L MIL Lamp on VIN: 4FA4R16V8Y
P0171: Adaptive Fuel Trim Too Lean (Bank 1). ... couple of system lean codes P0172 and P0174. Looks like a poss vacuum leak or MAF sensor from the data base. Not seeing any vacumm leaks and when I disconnected the MAF sensor the vehicle still runs. That was strange. Any ideas on this one? The OXy sensors...
August 31, 2007
2005 Ford F-150 King Ranch 5.4L Misfire, MIL Lamp on VIN: 1FTPW12535
P0171: Lean Bank 1. ... present and also P0345 and P0349 related to cam position sensor on bank 2. We replaced VCT solenoid for bank 2 with no difference. We noticed a lot of oil gunk buildup in valve cover and around...
August 03, 2007
2004 Nissan Sentra SE-R 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3N1AB51D94
P0171: Fuel Trim Lean. Hello fellow Nissan Tech's. I have a 04 Sentra SE-R Spec V here that is having some difficulty's. Has very poor idle quality, and will at times stall, i replaced the crank position sensor for the crank code that it was throwing and that code has not since came...
August 04, 2007
2002 Ford Focus LX 2.0L MIL Lamp on VIN: WF0AXXWPDA
P0171: system too lean bank 1. ... diagnostic check showed code p0171 I cleared it and drove the car for a day and mil light returned checked fuel pressure 45psi @ idle replaced fuel filter cleared the light drove the car it came on again after couple off days any suggestions.Thanks in adva...
August 06, 2007
2002 Ford Focus LX 2.0L MIL Lamp on VIN: WF0AXXWPDA
P0171: system too lean bank 1. ... diagnostic check showed code p0171 I cleared it and drove the car for a day and mil light returned checked fuel pressure 45psi @ idle replaced fuel filter cleared the light drove the car it came on again after couple off days any suggestions.Thanks in adva...
August 07, 2007
1999 Suzuki Grand Vitara JLX 2.5L Stall VIN: JS3TD62VXX
P0171: Fuel System Too Lean (Bank 1). ... Suzuki. It has these lean codes.P0171 and P0174. We smoked this engine and see no leaks. We thought it might be an egr valve but it is not it. This vehicle stalls after it has been driven for about half hour. It starts right...
August 09, 2007
1999 Volkswagen Jetta GLS 2.0L Poor Idle Quality VIN: 3VWSA29M3X
P0171: System too lean bank 1. vechicle came to shop for failed smog due to check engine light. found vacuum leaks at line to fuel pressure regulator - replaced, dipstick tube - replaced, and brake booster - replaced. Cleared codes and now vehicle is barely driveable ??
August 09, 2007
1997 Ford Expedition XLT 5.4L Excessive Emissions, Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1FNFU18L5V
ses light on steady runs very rich @ idle & will drop out of closed loop @ idle and run realy bad.my question is ect pid will not go over 118 degress cylinder reads about 200 degress iat reads 104 is there a ect & if there is where is it located we hav...
August 16, 2007
2003 Chevrolet Avalanche 1500 5.3L Poor Idle Quality, Surge, Stall VIN: 3GNEK13T62
P0171: Fuel Trim System Lean (Bank 1). Vehicle in for stalling, hard starting and surging/poor idle, backfiring. Codes present as I have listed. Smoked intake manifold and found no leaks other than a wisp from the throttle body. Tourque checked on intake bolts and was good at 10nm. Cant fault intak...
August 22, 2007
1999 Ford Ranger XL 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FTYR11V9X
P0171: lean bank 1. Truck came in with P0171 & P0174 codes. Customer told me motor replaced out og salvage yard recently. Smoked intake and found leaks at gaskets. Replaced upper & lower intake gaskets. Cleared codes test drove and both codes came back. Freeze frame shows...
August 23, 2007
2001 BMW X5 4.4i 4.4L MIL Lamp on, LEAN BANK #1 AND 2 VIN: WBAFB22551
P0171: Bank 1 lean BMW factry code 24 and 26. Hello every on , I have a 2001 BMW X5 4.4L the Check Engine light is on and I got the codes with the Snap On Scanner MT2500 , the code is PO171 and PO174,(BMW factory codes are 24,26,25,27) I cant find the problem, did any one had this trable code or problem b...
August 24, 2007
1999 Ford Ranger XL 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FTYR11V9X
P0171: lean bank 1. Truck came in with P0171 & P0174 codes. Customer told me motor replaced out og salvage yard recently. Smoked intake and found leaks at gaskets. Replaced upper & lower intake gaskets. Cleared codes test drove and both codes came back. Freeze frame shows...
August 24, 2007
2000 Mazda B4000 SE 4.0L MIL Lamp on VIN: 4FA4R16V8Y
P0171: Adaptive Fuel Trim Too Lean (Bank 1). ... couple of system lean codes P0172 and P0174. Looks like a poss vacuum leak or MAF sensor from the data base. Not seeing any vacumm leaks and when I disconnected the MAF sensor the vehicle still runs. That was strange. Any ideas on this one? The OXy sensors...
August 31, 2007