Join Now
International Automotive Technicians Network

P0171 Diagnostic Trouble Code Discussion for May 2007

Fuel System Lean (Bank 1)


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0171
Help Request Posted
1996 Ford E-150 Econoline 5.0L MIL Lamp on VIN: 1FDEE14H4T
P0171: Lean Bank 1. ... illuminated. A quick scan revealed an intermittent MAF code, as well as the dreaded P0171/P0174 codes. Tapping the MAF with the butt end of a screwdriver induced the van to stumble, so I brought a recommendation to the custome...
May 04, 2007
1999 Ford Windstar SE 3.8L MIL Lamp on VIN: 2FMZA5242X
P0171: lean bank 1. Hi all need help on this windstar. replaced plenum o_rings, bolts and fuel pressure vacuum line as per tbs 8,000 miles ago for these codes now back again with same codes. Data shows at idle both rear O2's stay rich. Checked for vacuum leak none found. Cleaned ...
May 04, 2007
1995 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52L75
P0171: Fuel trim lean. ... Buick. According to the owner this has been stalling intermittently for quit a while but it always starts back up immediately. They took it to a dealer a while back and he said they replaced a "wire on top of the engine". I'm assuming a plug wire. ...
May 05, 2007
2001 Volkswagen Passat GLS 1.8L MIL Lamp on VIN: WVWHC63B11
P0171: bank 1 system too lean. customer returned vehicle complained of mil on.scanned for dtc's p0300,p0302,po171 present.visual inspection found vacuum hoses leaking,replaced hoses,cleaned maf sensor,checked fuel pressure ok .air filter,fuel filter new.cleared codes,road tested no missfire...
May 07, 2007
2000 Nissan Maxima GLE 3.0L Poor Idle Quality, Hesitation, Surge, Stall, MIL Lamp on VIN: JN1CA31A4Y
P0171: Fuel Trim Lean (Bank 1). Dear Members, This 2000 Nissan Maxima starts fine and idles ok but no power at all. When I pinch fuel return hose (fuel pressure gage reads 70 p.s.i), then engine will rev up and Maxima is drivable. Replaced with known good MAF, no difference. Remove fuel pump...
May 09, 2007
2003 Ford Ranger Edge 3.0L Hesitation, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1FTYR14V03
P0171: Fuel Trim Too Lean Bank 1. Guys( I need HELP! This vehicle came in with several codes, the misfire codes being the major complaint. With the codes that were there I started with the injectors... they were fine, even changed with known good injectors with no change. Also there is a strng...
May 14, 2007
2000 Ford Taurus LX 3.0L Misfire VIN: 1MEFM55S2Y
P0171: bank 1 lean pending only. ... not a taurus, but o well. i've already replaced the injector and ign coil for this cyl, and swapped plugs between cyls, to no improvement. my problem is that the car sets a p0304 (cyl 4 misfire) and has a lean code p0171 (bank 1 lean) that is pending. the ...
May 15, 2007
2003 Ford Ranger Edge 3.0L Hesitation, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1FTYR14V03
P0171: Fuel Trim Too Lean Bank 1. Guys( I need HELP! This vehicle came in with several codes, the misfire codes being the major complaint. With the codes that were there I started with the injectors... they were fine, even changed with known good injectors with no change. Also there is a strng...
May 15, 2007
2002 Toyota Celica GT 1.8L MIL Lamp on VIN: JTDDR32T9Y
P0171: Fuel System Too Lean (Bank 1). suspect intake gsks hi idle cold thanks for help
May 15, 2007
2000 Nissan Maxima SE 3.0L Hesitation, MIL Lamp on VIN: JN1CA31DOY
P0171: Fuel Trim Lean (Bank 1). veh. keeps setting po171 code at 60mph factory pids checked oem and obdII generic, all pids checked good. after 2 attempts to fix po171 with o2 sensor,inj serv. , new o2 and intake plenum gasket. customer revealed hesitation rough run in am or after long sit s...
May 16, 2007
2004 Jaguar XJ8 4.2L Hesitation, Misfire, MIL Lamp on VIN: SAJWA71C84
P0171: Fuel System Too Lean Bank 1. ... one. HISTORY : 01/062004.Vehicle was damaged while being delivered with 3 miles on the clock in Newark NJ.. Damage confined to the rear trunk area. Vehicle repaired . 03/04/2004 Mileage 20. Vehicle Serviced. 03/04/2004 Vehicle in Dealer Inventory. 03/30/2...
May 18, 2007
1998 Ford E-150 Econoline 4.2L MIL Lamp on, Spark Knock VIN: 1FTRE1423W
P0171: Bank 1 System too lean. This van came in about six months ago with a check engine light on and customer complaint of a spark knock. Vehicle had no drivability problems. Retrieved codes PO171 & PO174. The Baro PID. was 142 Htz. For the area that we are in, that is way below the ex...
May 29, 2007
2000 Lexus RX300 3.0L Hesitation, MIL Lamp on VIN: JT6HF10U8Y
P0171: lean bank one. po 171 stores regularly with in 4 drive cycles on hevy accel bank one fuel trim is -11-12% at idle. car hesitates bad on heavy accel it doesnt seem to be misfireing. on moderate accel it runs great. fuel pressure doesnt drop off. no ign miss stored. im confuse...
May 30, 2007
1996 Ford E-150 Econoline 5.0L MIL Lamp on VIN: 1FDEE14H4T
P0171: Lean Bank 1. ... illuminated. A quick scan revealed an intermittent MAF code, as well as the dreaded P0171/P0174 codes. Tapping the MAF with the butt end of a screwdriver induced the van to stumble, so I brought a recommendation to the custome...
May 04, 2007
1999 Ford Windstar SE 3.8L MIL Lamp on VIN: 2FMZA5242X
P0171: lean bank 1. Hi all need help on this windstar. replaced plenum o_rings, bolts and fuel pressure vacuum line as per tbs 8,000 miles ago for these codes now back again with same codes. Data shows at idle both rear O2's stay rich. Checked for vacuum leak none found. Cleaned ...
May 04, 2007
1995 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52L75
P0171: Fuel trim lean. ... Buick. According to the owner this has been stalling intermittently for quit a while but it always starts back up immediately. They took it to a dealer a while back and he said they replaced a "wire on top of the engine". I'm assuming a plug wire. ...
May 05, 2007
2001 Volkswagen Passat GLS 1.8L MIL Lamp on VIN: WVWHC63B11
P0171: bank 1 system too lean. customer returned vehicle complained of mil on.scanned for dtc's p0300,p0302,po171 present.visual inspection found vacuum hoses leaking,replaced hoses,cleaned maf sensor,checked fuel pressure ok .air filter,fuel filter new.cleared codes,road tested no missfire...
May 07, 2007
2000 Nissan Maxima GLE 3.0L Poor Idle Quality, Hesitation, Surge, Stall, MIL Lamp on VIN: JN1CA31A4Y
P0171: Fuel Trim Lean (Bank 1). Dear Members, This 2000 Nissan Maxima starts fine and idles ok but no power at all. When I pinch fuel return hose (fuel pressure gage reads 70 p.s.i), then engine will rev up and Maxima is drivable. Replaced with known good MAF, no difference. Remove fuel pump...
May 09, 2007
2003 Ford Ranger Edge 3.0L Hesitation, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1FTYR14V03
P0171: Fuel Trim Too Lean Bank 1. Guys( I need HELP! This vehicle came in with several codes, the misfire codes being the major complaint. With the codes that were there I started with the injectors... they were fine, even changed with known good injectors with no change. Also there is a strng...
May 14, 2007
2000 Ford Taurus LX 3.0L Misfire VIN: 1MEFM55S2Y
P0171: bank 1 lean pending only. ... not a taurus, but o well. i've already replaced the injector and ign coil for this cyl, and swapped plugs between cyls, to no improvement. my problem is that the car sets a p0304 (cyl 4 misfire) and has a lean code p0171 (bank 1 lean) that is pending. the ...
May 15, 2007
2003 Ford Ranger Edge 3.0L Hesitation, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1FTYR14V03
P0171: Fuel Trim Too Lean Bank 1. Guys( I need HELP! This vehicle came in with several codes, the misfire codes being the major complaint. With the codes that were there I started with the injectors... they were fine, even changed with known good injectors with no change. Also there is a strng...
May 15, 2007
2002 Toyota Celica GT 1.8L MIL Lamp on VIN: JTDDR32T9Y
P0171: Fuel System Too Lean (Bank 1). suspect intake gsks hi idle cold thanks for help
May 15, 2007
2000 Nissan Maxima SE 3.0L Hesitation, MIL Lamp on VIN: JN1CA31DOY
P0171: Fuel Trim Lean (Bank 1). veh. keeps setting po171 code at 60mph factory pids checked oem and obdII generic, all pids checked good. after 2 attempts to fix po171 with o2 sensor,inj serv. , new o2 and intake plenum gasket. customer revealed hesitation rough run in am or after long sit s...
May 16, 2007
2004 Jaguar XJ8 4.2L Hesitation, Misfire, MIL Lamp on VIN: SAJWA71C84
P0171: Fuel System Too Lean Bank 1. ... one. HISTORY : 01/062004.Vehicle was damaged while being delivered with 3 miles on the clock in Newark NJ.. Damage confined to the rear trunk area. Vehicle repaired . 03/04/2004 Mileage 20. Vehicle Serviced. 03/04/2004 Vehicle in Dealer Inventory. 03/30/2...
May 18, 2007
1998 Ford E-150 Econoline 4.2L MIL Lamp on, Spark Knock VIN: 1FTRE1423W
P0171: Bank 1 System too lean. This van came in about six months ago with a check engine light on and customer complaint of a spark knock. Vehicle had no drivability problems. Retrieved codes PO171 & PO174. The Baro PID. was 142 Htz. For the area that we are in, that is way below the ex...
May 29, 2007
2000 Lexus RX300 3.0L Hesitation, MIL Lamp on VIN: JT6HF10U8Y
P0171: lean bank one. po 171 stores regularly with in 4 drive cycles on hevy accel bank one fuel trim is -11-12% at idle. car hesitates bad on heavy accel it doesnt seem to be misfireing. on moderate accel it runs great. fuel pressure doesnt drop off. no ign miss stored. im confuse...
May 30, 2007