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P0171 Diagnostic Trouble Code Discussion for August 2011

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2003 Ford E-250 4.2L No Start VIN: 1FTNE24273
P0171: lean condition. Please Ford guys any help you can offer would be appreciated. This van has no "SERVICE ENGINE SOON" light. so I checked the PCM fuses and relay, they are good.Im not getting voltage on the control side of the relay.is that voltage supplyed by the PCM? ...
August 09, 2011
2003 Jaguar X-Type 2.5L Hesitation VIN: SAJEA51D43
P0171: System too lean. When driving "Cruise unavailable" warning comes on and vehicle loses acceleration. Then it will come back and vehicle will buck and jerk. Have checked the codes, re-set. Checked for intake leaks, none. Replaced fuel, etc... Have checked connections and...
August 10, 2011
1999 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W6X
P0171: Fuel System Lean (Bank 1). ok came in for check engine light po171& po174..no biggie found vacuum hose at intake next to pcv valve busted and also found another hose by cruise and abs pump that was busted so while i was attempting to change that one a small hose came off somewhere i...
August 16, 2011
2003 Toyota Corolla CE 1.8L Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JTDBR32E23
P0171: Fuel System Too Lean (Bank 1). car came in with p0301 and p0171. scanned and found map sensor only going to 65 under full throttle, customer changed map. Three days later back with same problem. Map test good upstream o2 stuck high and sluggish. Customer replaced o2. Three days later back w...
August 17, 2011
2000 Ford Windstar 3.8L Misfire VIN: 2FMZA5243Y
P0171: Lean. I replaced the plugs and wires with new motorcraft parts. The old plugs were fouled and original. The compression is 175 to 185 on all cylinders. Applying vacuum to EGR while idling causes a stall. A smoke test showed no leaks. The #3 injector connector had a ...
August 18, 2011
1999 Mercury Mountaineer 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 0824109487
P0171: bank 1 lean. Thanks for the help in advance. A buddy of mine just put a used engine in this vehicle, he has never heard it run before the engine swap. Runs rough, has 0171 and 0174 codes for lean condition. cleaned maf with no change. he tried two other maf sensors and no ...
August 18, 2011
2001 Toyota Corolla LE 1.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2J1BR12E01
P0171: Fuel System Too Lean (Bank 1). Car came in with severe misfire on cyl 3 with above codes.Customer states light has been on about 2 weeks and misfire has gotten progressively worse. She has owned it since May of this year. Pull COP, pull plug, semi oily deposit bridging center electrode to g...
August 18, 2011
2008 Ford F-450 Super Duty XL 6.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FDXX47Y8E
... Black smoke sometimes and no power. Code p0171,p0300,p3316 keeps coming back.
August 19, 2011
2001 Toyota Corolla LE 1.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2J1BR12E01
P0171: Fuel System Too Lean (Bank 1). Car came in with severe misfire on cyl 3 with above codes.Customer states light has been on about 2 weeks and misfire has gotten progressively worse. She has owned it since May of this year. Pull COP, pull plug, semi oily deposit bridging center electrode to g...
August 20, 2011
2008 Ford F-450 Super Duty XL 6.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FDXX47Y8E
... Black smoke sometimes and no power. Code p0171,p0300,p3316 keeps coming back.
August 22, 2011
2004 Nissan Sentra SE-R Spec V 2.5L MIL Lamp on VIN: 3N1AB51A54
P0171: Fuel Trim Lean. I've done everything i know for this code. changed maf with good one scoped maf all good. checked for vacumn leaks at least 10 times I'M LOST...If i drive the car hard(beat on it) the light stays off, if i drive it like an old man the code comes back in pendin...
August 24, 2011
2001 Toyota Corolla CE 1.8L Excessive Emissions, Cuts out VIN: 1NXBR12E41
P0171: Fuel System Too Lean (Bank 1). Vehicle hesitates at low rpm's/speeds but does not missfire. Initial scan had multiple missfire codes, O2 lean codes. Found coil mounting screws for cyl,s 1&2 stripped and coils popping up and not making good contact with plugs. Repaired threads for coil m...
August 24, 2011
2008 Ford E-150 4.6L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1FTNE14W48
When vehicle was brought into our shop it did not run at all. The customer stated that they put fuel into the vehicle and it started running poorly, then eventually stalled. We originally ran the car on clean fuel from a fuel systen cleaning canister. The vehi...
August 25, 2011
2002 Ford E-150 Econoline 5.4L MIL Lamp on VIN: 1FMRE11L42
P0171: Lean condition bank 1. The van came in with check egine light on with a stack of codes 136,1131,1151,0171,0174, all having to do with a lean condition. check and cleaned MAF The reason I replaced the pcm is that the rear O2 sensor wasn't working but when a completed the ground circu...
August 26, 2011
2001 Toyota Corolla CE 1.8L Excessive Emissions, Cuts out VIN: 1NXBR12E41
P0171: Fuel System Too Lean (Bank 1). Vehicle hesitates at low rpm's/speeds but does not missfire. Initial scan had multiple missfire codes, O2 lean codes. Found coil mounting screws for cyl,s 1&2 stripped and coils popping up and not making good contact with plugs. Repaired threads for coil m...
August 26, 2011
2000 Mercury Mystique GS 2.5L No Start, Cuts out, MIL Lamp on VIN: IMEFM66L6Y
P0171: Lean bank 1. This Mercury Mistake has been at my shop for over a month. Used car dealer bought it at an auction. It started cutting out on the way back and when it finally quit there was a no crank condition. He later found out this car was towed to the auction. It had sig...
August 29, 2011
2002 Ford E-150 Econoline 5.4L MIL Lamp on VIN: 1FMRE11L42
P0171: Lean condition bank 1. The van came in with check egine light on with a stack of codes 136,1131,1151,0171,0174, all having to do with a lean condition. check and cleaned MAF The reason I replaced the pcm is that the rear O2 sensor wasn't working but when a completed the ground circu...
August 30, 2011
2003 Ford E-250 4.2L No Start VIN: 1FTNE24273
P0171: lean condition. Please Ford guys any help you can offer would be appreciated. This van has no "SERVICE ENGINE SOON" light. so I checked the PCM fuses and relay, they are good.Im not getting voltage on the control side of the relay.is that voltage supplyed by the PCM? ...
August 09, 2011
2003 Jaguar X-Type 2.5L Hesitation VIN: SAJEA51D43
P0171: System too lean. When driving "Cruise unavailable" warning comes on and vehicle loses acceleration. Then it will come back and vehicle will buck and jerk. Have checked the codes, re-set. Checked for intake leaks, none. Replaced fuel, etc... Have checked connections and...
August 10, 2011
1999 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W6X
P0171: Fuel System Lean (Bank 1). ok came in for check engine light po171& po174..no biggie found vacuum hose at intake next to pcv valve busted and also found another hose by cruise and abs pump that was busted so while i was attempting to change that one a small hose came off somewhere i...
August 16, 2011
2003 Toyota Corolla CE 1.8L Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JTDBR32E23
P0171: Fuel System Too Lean (Bank 1). car came in with p0301 and p0171. scanned and found map sensor only going to 65 under full throttle, customer changed map. Three days later back with same problem. Map test good upstream o2 stuck high and sluggish. Customer replaced o2. Three days later back w...
August 17, 2011
2000 Ford Windstar 3.8L Misfire VIN: 2FMZA5243Y
P0171: Lean. I replaced the plugs and wires with new motorcraft parts. The old plugs were fouled and original. The compression is 175 to 185 on all cylinders. Applying vacuum to EGR while idling causes a stall. A smoke test showed no leaks. The #3 injector connector had a ...
August 18, 2011
1999 Mercury Mountaineer 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 0824109487
P0171: bank 1 lean. Thanks for the help in advance. A buddy of mine just put a used engine in this vehicle, he has never heard it run before the engine swap. Runs rough, has 0171 and 0174 codes for lean condition. cleaned maf with no change. he tried two other maf sensors and no ...
August 18, 2011
2001 Toyota Corolla LE 1.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2J1BR12E01
P0171: Fuel System Too Lean (Bank 1). Car came in with severe misfire on cyl 3 with above codes.Customer states light has been on about 2 weeks and misfire has gotten progressively worse. She has owned it since May of this year. Pull COP, pull plug, semi oily deposit bridging center electrode to g...
August 18, 2011
2008 Ford F-450 Super Duty XL 6.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FDXX47Y8E
... Black smoke sometimes and no power. Code p0171,p0300,p3316 keeps coming back.
August 19, 2011
2001 Toyota Corolla LE 1.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2J1BR12E01
P0171: Fuel System Too Lean (Bank 1). Car came in with severe misfire on cyl 3 with above codes.Customer states light has been on about 2 weeks and misfire has gotten progressively worse. She has owned it since May of this year. Pull COP, pull plug, semi oily deposit bridging center electrode to g...
August 20, 2011
2008 Ford F-450 Super Duty XL 6.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FDXX47Y8E
... Black smoke sometimes and no power. Code p0171,p0300,p3316 keeps coming back.
August 22, 2011
2004 Nissan Sentra SE-R Spec V 2.5L MIL Lamp on VIN: 3N1AB51A54
P0171: Fuel Trim Lean. I've done everything i know for this code. changed maf with good one scoped maf all good. checked for vacumn leaks at least 10 times I'M LOST...If i drive the car hard(beat on it) the light stays off, if i drive it like an old man the code comes back in pendin...
August 24, 2011
2001 Toyota Corolla CE 1.8L Excessive Emissions, Cuts out VIN: 1NXBR12E41
P0171: Fuel System Too Lean (Bank 1). Vehicle hesitates at low rpm's/speeds but does not missfire. Initial scan had multiple missfire codes, O2 lean codes. Found coil mounting screws for cyl,s 1&2 stripped and coils popping up and not making good contact with plugs. Repaired threads for coil m...
August 24, 2011
2008 Ford E-150 4.6L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1FTNE14W48
When vehicle was brought into our shop it did not run at all. The customer stated that they put fuel into the vehicle and it started running poorly, then eventually stalled. We originally ran the car on clean fuel from a fuel systen cleaning canister. The vehi...
August 25, 2011
2002 Ford E-150 Econoline 5.4L MIL Lamp on VIN: 1FMRE11L42
P0171: Lean condition bank 1. The van came in with check egine light on with a stack of codes 136,1131,1151,0171,0174, all having to do with a lean condition. check and cleaned MAF The reason I replaced the pcm is that the rear O2 sensor wasn't working but when a completed the ground circu...
August 26, 2011
2001 Toyota Corolla CE 1.8L Excessive Emissions, Cuts out VIN: 1NXBR12E41
P0171: Fuel System Too Lean (Bank 1). Vehicle hesitates at low rpm's/speeds but does not missfire. Initial scan had multiple missfire codes, O2 lean codes. Found coil mounting screws for cyl,s 1&2 stripped and coils popping up and not making good contact with plugs. Repaired threads for coil m...
August 26, 2011
2000 Mercury Mystique GS 2.5L No Start, Cuts out, MIL Lamp on VIN: IMEFM66L6Y
P0171: Lean bank 1. This Mercury Mistake has been at my shop for over a month. Used car dealer bought it at an auction. It started cutting out on the way back and when it finally quit there was a no crank condition. He later found out this car was towed to the auction. It had sig...
August 29, 2011
2002 Ford E-150 Econoline 5.4L MIL Lamp on VIN: 1FMRE11L42
P0171: Lean condition bank 1. The van came in with check egine light on with a stack of codes 136,1131,1151,0171,0174, all having to do with a lean condition. check and cleaned MAF The reason I replaced the pcm is that the rear O2 sensor wasn't working but when a completed the ground circu...
August 30, 2011