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P0171 Diagnostic Trouble Code Discussion for June 2007

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
1995 Buick Riviera 3.8L No Start VIN: 1G4GD22145
P0171: fuel trim lean. scan data- tech 2 not running- rpm 20/ egr pintle 100% 5 volts- diconnecct 0 /tps coolant and iac sensors read o or -40 f at times- loose data at times- back probed ecm on tps haves normal readings- egr normal- iac normal-lab scoped fuel control signal normal ...
June 04, 2007
1995 Buick Riviera 3.8L No Start VIN: 1G4GD22145
P0171: fuel trim lean. scan data- tech 2 not running- rpm 20/ egr pintle 100% 5 volts- diconnecct 0 /tps coolant and iac sensors read o or -40 f at times- loose data at times- back probed ecm on tps haves normal readings- egr normal- iac normal-lab scoped fuel control signal normal ...
June 05, 2007
1996 Ford E-150 Econoline 5.8L MIL Lamp on VIN: 1FDEE14H1T
P0171: system too lean bank 1. This vehicle sets these codes usually within a day. Serial # indicates that it is a 5.8 litre, but actually is a 4.6 SOHC. I have tested all that Mitchell says, can not find any vacuum leaks , low fuel pressure, or faulty 02. Oil level is full but not over. Lt...
June 05, 2007
1997 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMDU34EXV
P0171: system too lean bank 1. to all ford tech. can you please let me know where to look for this problems. thanks thoa
June 05, 2007
1999 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Stall, Poor Fuel Economy VIN: 1GNDT13WXX
P0171: Fuel System Lean (Bank 1). hi there this started out to be minor and got worse noticed poor gas mileage and did tune up with no change in mileage often hesitates and stumbles had i 1 mil pop up for system lean bank 1 but it smells rich and just this week i smelled rotten egg and a rattl...
June 06, 2007
2003 Dodge Neon SXT 2.0L Poor Idle Quality, MIL Lamp on VIN: 1B3ES56C93
P0171: Fuel System Lean (Bank 1). i need some help on this neon with a lean code. it intermittently has a slightly rough idle. fuel trims are maxed out at idle, but return to normal off idle. we smoked it and sprayed it with gumcutter and cannot find any vacuum leaks. we pinched numerous vacuu...
June 08, 2007
1997 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMDU34EXV
P0171: system too lean bank 1. to all ford tech. can you please let me know where to look for this problems. thanks thoa
June 08, 2007
2001 Nissan Maxima GLE 3.0L MIL Lamp on VIN: JN1CA31D81
P0171: Fuel Trim Lean (Bank 1). Code p0171 lean, car runs great, had problem pulling codes and found fuse #12 blown (labeled :"Electronic parts") Replaced fuse and was able to pull code p0171. Question will this cause a code p0171? No good schematics on all data for this circuit. Fus...
June 08, 2007
1999 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Stall, Poor Fuel Economy VIN: 1GNDT13WXX
P0171: Fuel System Lean (Bank 1). hi there this started out to be minor and got worse noticed poor gas mileage and did tune up with no change in mileage often hesitates and stumbles had i 1 mil pop up for system lean bank 1 but it smells rich and just this week i smelled rotten egg and a rattl...
June 10, 2007
1999 Dodge Grand Caravan SE 3.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 2B4GP44G6X
P0171: Fuel System Lean (Bank 1). the vehicle would not go into close loop.the pcm pin cofiguration was differnt between a engine code g and r.i ran a o2 sensor return to the pcm and got vehicle to go into close loop.for the short to voltage and centering code.the lean code was also a egr that...
June 12, 2007
1996 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W3T
P0171: Fuel System Lean (Bank 1). Vehicle runs fine, no symptoms except that the MIL comes on with in one day of clearing the codes. I am leaning towards a fuel pressure problem, but would like a second opinion due to the expense of a regulator. Fuel pressure readings listed below in test sect...
June 14, 2007
2000 Dodge Durango 4.7L Excessive Emissions, Poor Fuel Economy, MIL Lamp on, black exhaust VIN: 1B4HS28N1Y
P0171: Fuel System Lean (Bank 1). Customer brought truck in - said blows black smoke on acceleration, gets poor fuel economy (8mpg), and has MIL light. codes were as above stated- po171 and po551. The engine was running lean and the p/s switch was leaking.I researched and found that the pwr st...
June 14, 2007
2002 Kia Sportage 2.0L No Start, NOI START SOME TIME VIN: KNDJB72352
P0171: Fuel System Too Lean (Bank 1). vehicle cam in with intermittent running problem .vehicle would drive fine then loose power as if starving for fuel kill vehicle and re start and problem seemsed to go away according to customer previous shop diagnosed maf sensor vehicle returned with same pro...
June 16, 2007
1996 Dodge Ram 1500 Truck 5.9L Hesitation, Surge, MIL Lamp on VIN: 1B7HF16Z7T
P0171: Fuel System Lean (Bank 1). Customer tows a trailer over a mountain pass. SES light comes on only while towning. All my scan data looks normal right now but my freezeframe scan data is off... rpm of 640 and map of 3.5" and load of 13.3 ltft 32.8 and stft 13.3 Fuel pump replaced last ...
June 19, 2007
1999 Toyota Celica GT 2.2L Hesitation, MIL Lamp on VIN: ZZT231-000
P0171: Fuel System Too Lean (Bank 1). Dear fellow techs, car came into the shop with a complaint of hesitation on acceleration and MIL is coming on high speed. I checked fuel pressure, spark pulgs are new (oem). the fuel filter is in the fuel tank and it's clean. Any help will be greatly apreciat...
June 21, 2007
1999 Ford Contour LX 2.0L Poor Idle Quality VIN: 1FAFP6530X
P0171: Lean code. ... posting this for a friend. Customer complains that vehicle will idle very high, only after a short drive with A/C on. The PCM raises idle about 250 when A/C is turned on, but after a short drive the idle might be as high as 2,000 rpm and won't shut down un...
June 22, 2007
1999 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA5148X
P0171: Lean fuel mix Bank1. Vehicle has come back to me 3 times now. Always the same code. I have cleaned the injectors, tested fuel press., changed fuel filter, checked all vac. lines etc. under hood, removed top of plenum to check EGR orifices/valve . I can't find anything wrong, but t...
June 22, 2007
1999 Toyota Celica GT 2.2L Hesitation, MIL Lamp on VIN: ZZT231-000
P0171: Fuel System Too Lean (Bank 1). Dear fellow techs, car came into the shop with a complaint of hesitation on acceleration and MIL is coming on high speed. I checked fuel pressure, spark pulgs are new (oem). the fuel filter is in the fuel tank and it's clean. Any help will be greatly apreciat...
June 22, 2007
2001 Ford F-150 XL 4.2L Poor Idle Quality, MIL Lamp on VIN: 2FTZX172X1
P0171: bank 1 lean. what usually goes wrong with the imrc actuator and how do you get to it .the unit is on the backside of intake manifold and you can not see it.pull the trans or what?
June 26, 2007
1996 Ford F-150 Eddie Bauer 4.9L MIL Lamp on VIN: 2FTEF15Y1T
P0171: lean bank 1. We have this 1996 F-150 that keeps throwing lean codes. We've changed intakes and MAF sensor. The long term fuel trim still pegs out at 25% after running 15 min. Smoked engine and found no other leaks. Would be very grateful for some help with this one!!!
June 27, 2007
2002 Subaru Outback 2.5L MIL Lamp on VIN: 453BH67542
P0171: Fuel System Too Lean (Bank 1). o.k. This one has my puzzled 02 subie 2.5ltr with a po171 code coming up after you drive for a day or two.I cannot find anything wrong tested the map it test fine,fuel pressure with and without reg within spec,smoked the intake for leaks and smoked the exhau...
June 27, 2007
2003 Dodge Ram 1500 Truck 4.7L Cuts out VIN: 1D7HA18N33
P0171: Fuel System Lean (Bank 1). This truck runs very good most of the time, it has a lot of power. The only complaint is the truck dies during idle, it does not happen everytime but once every 2 days or so. The truck starts right up, like nothing ever happen. I replaced spark plugs because t...
June 28, 2007
1997 Ford F-150 Lariat 5.4L Poor Idle Quality VIN: 1FTEX08L9V
P0171: bank 1 lean. vehicle starts to run bad after sitting at idle accelerates ok. performed smoke test found small plastic line leak repaired w/no effect. inspected plugs o.e platinum looks ok very clean no discoloration. getting ready to sell fuel filter and injector psi clean...
June 28, 2007
1995 Buick Riviera 3.8L No Start VIN: 1G4GD22145
P0171: fuel trim lean. scan data- tech 2 not running- rpm 20/ egr pintle 100% 5 volts- diconnecct 0 /tps coolant and iac sensors read o or -40 f at times- loose data at times- back probed ecm on tps haves normal readings- egr normal- iac normal-lab scoped fuel control signal normal ...
June 04, 2007
1995 Buick Riviera 3.8L No Start VIN: 1G4GD22145
P0171: fuel trim lean. scan data- tech 2 not running- rpm 20/ egr pintle 100% 5 volts- diconnecct 0 /tps coolant and iac sensors read o or -40 f at times- loose data at times- back probed ecm on tps haves normal readings- egr normal- iac normal-lab scoped fuel control signal normal ...
June 05, 2007
1996 Ford E-150 Econoline 5.8L MIL Lamp on VIN: 1FDEE14H1T
P0171: system too lean bank 1. This vehicle sets these codes usually within a day. Serial # indicates that it is a 5.8 litre, but actually is a 4.6 SOHC. I have tested all that Mitchell says, can not find any vacuum leaks , low fuel pressure, or faulty 02. Oil level is full but not over. Lt...
June 05, 2007
1997 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMDU34EXV
P0171: system too lean bank 1. to all ford tech. can you please let me know where to look for this problems. thanks thoa
June 05, 2007
1999 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Stall, Poor Fuel Economy VIN: 1GNDT13WXX
P0171: Fuel System Lean (Bank 1). hi there this started out to be minor and got worse noticed poor gas mileage and did tune up with no change in mileage often hesitates and stumbles had i 1 mil pop up for system lean bank 1 but it smells rich and just this week i smelled rotten egg and a rattl...
June 06, 2007
2003 Dodge Neon SXT 2.0L Poor Idle Quality, MIL Lamp on VIN: 1B3ES56C93
P0171: Fuel System Lean (Bank 1). i need some help on this neon with a lean code. it intermittently has a slightly rough idle. fuel trims are maxed out at idle, but return to normal off idle. we smoked it and sprayed it with gumcutter and cannot find any vacuum leaks. we pinched numerous vacuu...
June 08, 2007
1997 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMDU34EXV
P0171: system too lean bank 1. to all ford tech. can you please let me know where to look for this problems. thanks thoa
June 08, 2007
2001 Nissan Maxima GLE 3.0L MIL Lamp on VIN: JN1CA31D81
P0171: Fuel Trim Lean (Bank 1). Code p0171 lean, car runs great, had problem pulling codes and found fuse #12 blown (labeled :"Electronic parts") Replaced fuse and was able to pull code p0171. Question will this cause a code p0171? No good schematics on all data for this circuit. Fus...
June 08, 2007
1999 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Stall, Poor Fuel Economy VIN: 1GNDT13WXX
P0171: Fuel System Lean (Bank 1). hi there this started out to be minor and got worse noticed poor gas mileage and did tune up with no change in mileage often hesitates and stumbles had i 1 mil pop up for system lean bank 1 but it smells rich and just this week i smelled rotten egg and a rattl...
June 10, 2007
1999 Dodge Grand Caravan SE 3.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 2B4GP44G6X
P0171: Fuel System Lean (Bank 1). the vehicle would not go into close loop.the pcm pin cofiguration was differnt between a engine code g and r.i ran a o2 sensor return to the pcm and got vehicle to go into close loop.for the short to voltage and centering code.the lean code was also a egr that...
June 12, 2007
1996 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W3T
P0171: Fuel System Lean (Bank 1). Vehicle runs fine, no symptoms except that the MIL comes on with in one day of clearing the codes. I am leaning towards a fuel pressure problem, but would like a second opinion due to the expense of a regulator. Fuel pressure readings listed below in test sect...
June 14, 2007
2000 Dodge Durango 4.7L Excessive Emissions, Poor Fuel Economy, MIL Lamp on, black exhaust VIN: 1B4HS28N1Y
P0171: Fuel System Lean (Bank 1). Customer brought truck in - said blows black smoke on acceleration, gets poor fuel economy (8mpg), and has MIL light. codes were as above stated- po171 and po551. The engine was running lean and the p/s switch was leaking.I researched and found that the pwr st...
June 14, 2007
2002 Kia Sportage 2.0L No Start, NOI START SOME TIME VIN: KNDJB72352
P0171: Fuel System Too Lean (Bank 1). vehicle cam in with intermittent running problem .vehicle would drive fine then loose power as if starving for fuel kill vehicle and re start and problem seemsed to go away according to customer previous shop diagnosed maf sensor vehicle returned with same pro...
June 16, 2007
1996 Dodge Ram 1500 Truck 5.9L Hesitation, Surge, MIL Lamp on VIN: 1B7HF16Z7T
P0171: Fuel System Lean (Bank 1). Customer tows a trailer over a mountain pass. SES light comes on only while towning. All my scan data looks normal right now but my freezeframe scan data is off... rpm of 640 and map of 3.5" and load of 13.3 ltft 32.8 and stft 13.3 Fuel pump replaced last ...
June 19, 2007
1999 Toyota Celica GT 2.2L Hesitation, MIL Lamp on VIN: ZZT231-000
P0171: Fuel System Too Lean (Bank 1). Dear fellow techs, car came into the shop with a complaint of hesitation on acceleration and MIL is coming on high speed. I checked fuel pressure, spark pulgs are new (oem). the fuel filter is in the fuel tank and it's clean. Any help will be greatly apreciat...
June 21, 2007
1999 Ford Contour LX 2.0L Poor Idle Quality VIN: 1FAFP6530X
P0171: Lean code. ... posting this for a friend. Customer complains that vehicle will idle very high, only after a short drive with A/C on. The PCM raises idle about 250 when A/C is turned on, but after a short drive the idle might be as high as 2,000 rpm and won't shut down un...
June 22, 2007
1999 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA5148X
P0171: Lean fuel mix Bank1. Vehicle has come back to me 3 times now. Always the same code. I have cleaned the injectors, tested fuel press., changed fuel filter, checked all vac. lines etc. under hood, removed top of plenum to check EGR orifices/valve . I can't find anything wrong, but t...
June 22, 2007
1999 Toyota Celica GT 2.2L Hesitation, MIL Lamp on VIN: ZZT231-000
P0171: Fuel System Too Lean (Bank 1). Dear fellow techs, car came into the shop with a complaint of hesitation on acceleration and MIL is coming on high speed. I checked fuel pressure, spark pulgs are new (oem). the fuel filter is in the fuel tank and it's clean. Any help will be greatly apreciat...
June 22, 2007
2001 Ford F-150 XL 4.2L Poor Idle Quality, MIL Lamp on VIN: 2FTZX172X1
P0171: bank 1 lean. what usually goes wrong with the imrc actuator and how do you get to it .the unit is on the backside of intake manifold and you can not see it.pull the trans or what?
June 26, 2007
1996 Ford F-150 Eddie Bauer 4.9L MIL Lamp on VIN: 2FTEF15Y1T
P0171: lean bank 1. We have this 1996 F-150 that keeps throwing lean codes. We've changed intakes and MAF sensor. The long term fuel trim still pegs out at 25% after running 15 min. Smoked engine and found no other leaks. Would be very grateful for some help with this one!!!
June 27, 2007
2002 Subaru Outback 2.5L MIL Lamp on VIN: 453BH67542
P0171: Fuel System Too Lean (Bank 1). o.k. This one has my puzzled 02 subie 2.5ltr with a po171 code coming up after you drive for a day or two.I cannot find anything wrong tested the map it test fine,fuel pressure with and without reg within spec,smoked the intake for leaks and smoked the exhau...
June 27, 2007
2003 Dodge Ram 1500 Truck 4.7L Cuts out VIN: 1D7HA18N33
P0171: Fuel System Lean (Bank 1). This truck runs very good most of the time, it has a lot of power. The only complaint is the truck dies during idle, it does not happen everytime but once every 2 days or so. The truck starts right up, like nothing ever happen. I replaced spark plugs because t...
June 28, 2007
1997 Ford F-150 Lariat 5.4L Poor Idle Quality VIN: 1FTEX08L9V
P0171: bank 1 lean. vehicle starts to run bad after sitting at idle accelerates ok. performed smoke test found small plastic line leak repaired w/no effect. inspected plugs o.e platinum looks ok very clean no discoloration. getting ready to sell fuel filter and injector psi clean...
June 28, 2007