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P0171 Diagnostic Trouble Code Discussion for October 2005

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2001 Infiniti QX4 3.5L MIL Lamp on, ping under accel,
P0171: Fuel Trim Lean (Bank 1). ... varible timing sensor bank #2 (installed new, code went away) Was getting lazy readings on o2 sensor bank #1 sensor #1 (installed factory o2), reset light came on next day at start up. Took vehicle to Nissan, was told that the VATC solonoids (for cam)get s...
October 04, 2005
2001 Cadillac DeVille 4.6L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1G6KD54YX1
P0171: Fuel Trim System Lean (Bank 1). This caddy has a rough, surging idle...constanly going from 500 to 650 rpm. It has codes 171 and 174 saying it is too lean. I have sprayed berryman all over it & found no vac. leaks, removed & plugged the egr, no change. ...EGO sensors all reading very...
October 12, 2005
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13WXS
P0171: rich limit. hi guys hope you can help truck came in with 2 rich limit codes in it fuel pressure ok but not holding. poped the upper intake to find the regulator leeking replaced the reg cleared codes and all was well for a week now the stupid thing is back with a po420 ca...
October 14, 2005
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13WXS
P0171: rich limit. hi guys hope you can help truck came in with 2 rich limit codes in it fuel pressure ok but not holding. poped the upper intake to find the regulator leeking replaced the reg cleared codes and all was well for a week now the stupid thing is back with a po420 ca...
October 15, 2005
2000 Saturn LS2 3.0L Misfire, MIL Lamp on VIN: 1G8JW52R0Y
P0171: Fuel Trim System Lean (Bank 1). car initially came in with p0171. returned 2 weeks later with p0171 and p0174, system lean. alldata says to check for fuel pressure, vacuum leak, exhaust leak, restricted fuel injector(s), maf prob, water in fuel. says if o2 b1s1 is greater than 1.2 and o2 b1s...
October 18, 2005
1996 Ford Mustang GT 4.6L MIL Lamp on VIN: 1FALP45X9T
P0171: sys too lean bank 1. this mustang came to us with history of drivability problems. the customer had it at another shop for cel light on and no power concerns. they put in a new fuel pump. this did not fix all of the problems. now he brought us the car. when i pulled the codes and ...
October 21, 2005
2001 Infiniti I30 3.0L MIL Lamp on VIN: JNKCA31A81
P0171: Fuel Trim Lean (Bank 1). Lean condition and code set for o2 activity problem, lab scoped o2 and confirmed it wouldnt come off of lean (near zero) line, even when forced rich, b2s1 seems fine and even can be forced , however I noticed b1s1 wouldnt switch, so I recomended o2 after testi...
October 26, 2005
2002 Cadillac Escalade 6.0L Poor Idle Quality, MIL Lamp on VIN: 1GYEK63N02
P0171: Fuel Trim System Lean (Bank 1). ... p0102, p0171 and p0174. Has already been to dealer twice. I verified the wiring repair over the front drive shaft. They did an excellent job. At some point the wiring had shorted out blowing the 10 amp ign1 fuse in the un...
October 28, 2005
1998 Lexus ES300 3.0L Misfire, MIL Lamp on VIN: JT8BF28G0W
P0171: Fuel System Too Lean (Bank 1). Ok Im stumped on this one... I have this lexus that the best description the customer can tell me is that this problem happens after being driven for 50+ miles. I was able to duplicate it once. It misfires the MIL light comes on and the above codes are stored....
October 28, 2005
2001 BMW 330Ci 3.0L Misfire, MIL Lamp on VIN: WBABS53491
P0171: System lean bank 1. Hello, This BMW came in with 6 codes, all of which are shown below. The customer says the car runs bad when the light is on, but the light will go off on its own and the car will run fine. I cannot get the codes to reset or the vehicle to run poorly. The lea...
October 31, 2005
2001 Infiniti QX4 3.5L MIL Lamp on, ping under accel,
P0171: Fuel Trim Lean (Bank 1). ... varible timing sensor bank #2 (installed new, code went away) Was getting lazy readings on o2 sensor bank #1 sensor #1 (installed factory o2), reset light came on next day at start up. Took vehicle to Nissan, was told that the VATC solonoids (for cam)get s...
October 04, 2005
2001 Cadillac DeVille 4.6L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1G6KD54YX1
P0171: Fuel Trim System Lean (Bank 1). This caddy has a rough, surging idle...constanly going from 500 to 650 rpm. It has codes 171 and 174 saying it is too lean. I have sprayed berryman all over it & found no vac. leaks, removed & plugged the egr, no change. ...EGO sensors all reading very...
October 12, 2005
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13WXS
P0171: rich limit. hi guys hope you can help truck came in with 2 rich limit codes in it fuel pressure ok but not holding. poped the upper intake to find the regulator leeking replaced the reg cleared codes and all was well for a week now the stupid thing is back with a po420 ca...
October 14, 2005
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13WXS
P0171: rich limit. hi guys hope you can help truck came in with 2 rich limit codes in it fuel pressure ok but not holding. poped the upper intake to find the regulator leeking replaced the reg cleared codes and all was well for a week now the stupid thing is back with a po420 ca...
October 15, 2005
2000 Saturn LS2 3.0L Misfire, MIL Lamp on VIN: 1G8JW52R0Y
P0171: Fuel Trim System Lean (Bank 1). car initially came in with p0171. returned 2 weeks later with p0171 and p0174, system lean. alldata says to check for fuel pressure, vacuum leak, exhaust leak, restricted fuel injector(s), maf prob, water in fuel. says if o2 b1s1 is greater than 1.2 and o2 b1s...
October 18, 2005
1996 Ford Mustang GT 4.6L MIL Lamp on VIN: 1FALP45X9T
P0171: sys too lean bank 1. this mustang came to us with history of drivability problems. the customer had it at another shop for cel light on and no power concerns. they put in a new fuel pump. this did not fix all of the problems. now he brought us the car. when i pulled the codes and ...
October 21, 2005
2001 Infiniti I30 3.0L MIL Lamp on VIN: JNKCA31A81
P0171: Fuel Trim Lean (Bank 1). Lean condition and code set for o2 activity problem, lab scoped o2 and confirmed it wouldnt come off of lean (near zero) line, even when forced rich, b2s1 seems fine and even can be forced , however I noticed b1s1 wouldnt switch, so I recomended o2 after testi...
October 26, 2005
2002 Cadillac Escalade 6.0L Poor Idle Quality, MIL Lamp on VIN: 1GYEK63N02
P0171: Fuel Trim System Lean (Bank 1). ... p0102, p0171 and p0174. Has already been to dealer twice. I verified the wiring repair over the front drive shaft. They did an excellent job. At some point the wiring had shorted out blowing the 10 amp ign1 fuse in the un...
October 28, 2005
1998 Lexus ES300 3.0L Misfire, MIL Lamp on VIN: JT8BF28G0W
P0171: Fuel System Too Lean (Bank 1). Ok Im stumped on this one... I have this lexus that the best description the customer can tell me is that this problem happens after being driven for 50+ miles. I was able to duplicate it once. It misfires the MIL light comes on and the above codes are stored....
October 28, 2005
2001 BMW 330Ci 3.0L Misfire, MIL Lamp on VIN: WBABS53491
P0171: System lean bank 1. Hello, This BMW came in with 6 codes, all of which are shown below. The customer says the car runs bad when the light is on, but the light will go off on its own and the car will run fine. I cannot get the codes to reset or the vehicle to run poorly. The lea...
October 31, 2005