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P0171 Diagnostic Trouble Code Discussion for September 2010

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2001 Oldsmobile Silhouette GL 3.4L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GHDX13E61
P0171: Fuel Trim System Lean (Bank 1). car dont start but after seat over 3 or 4 hours , or over night the car will start fine and run good then after couple secunds working will start to misfire, loop, backfire and making various other sounds finely not will not run anymore
September 01, 2010
1998 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMZU34E4W
P0171: Bank 1 Lean. 98 Explorer with ohc 4.0. Sets p0171 and 174. Already replaced intake gaskets, MAF and downstream 02 sensors. Smoke tested and found no leaks. Monitored fuel trims both LT +25 both ST +3 to +6. With increase in RPM the LT drops to 0 immediatly and the ST climb...
September 09, 2010
2000 Toyota Tacoma Pre Runner 2.7L MIL Lamp on VIN: 4TAWM72N4Y
P0171: Fuel System Too Lean (Bank 1). Smoked intake system for leaks found leak @ T/B gasket, R&R gasket and cleaned throttle body unit heavy carbon buildup. Jumped pins E1 and TE1 on DLC in engine compartment and RPM didn't increase; verified power, ground and signal to IAC valve. Removed IAC...
September 09, 2010
2002 Volvo S40 1.9L MIL Lamp on VIN: YV1V529592
P0171: Lean bamk 1. ... and this is my first posting. This 2002 Volvo is setting p0171 lean bank 1, 19.0 LTFT, I have monitored O2 sensor, MAP sensor, temp sensor and MAF sensor all look to be normal. I have used a smoke test on intake no leaks found, I have used propane and watc...
September 13, 2010
2002 Volvo S40 1.9L MIL Lamp on VIN: YV1V529592
P0171: Lean bamk 1. ... and this is my first posting. This 2002 Volvo is setting p0171 lean bank 1, 19.0 LTFT, I have monitored O2 sensor, MAP sensor, temp sensor and MAF sensor all look to be normal. I have used a smoke test on intake no leaks found, I have used propane and watc...
September 14, 2010
2003 Ford F-150 King Ranch 4.6L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1FTRW076X3
P0171: Bank 1 system lean. Acting very odd, dtc's set very fast, for bank 1 lean, and bank 2 rich. Oxygen sensors test correct, and in addition to the above mentioned maintence done, the truck was tested for an intake leak, and nothing was found. Fuel pressure is within specs, and the i...
September 17, 2010
2000 Toyota Tacoma Pre Runner 2.7L MIL Lamp on VIN: 4TAWM72N4Y
P0171: Fuel System Too Lean (Bank 1). Smoked intake system for leaks found leak @ T/B gasket, R&R gasket and cleaned throttle body unit heavy carbon buildup. Jumped pins E1 and TE1 on DLC in engine compartment and RPM didn't increase; verified power, ground and signal to IAC valve. Removed IAC...
September 20, 2010
2007 Jeep Liberty Limited 3.7L Hesitation, Cuts out, MIL Lamp on VIN: 1J8GL48K67
P0171: Fuel System Lean (Bank 1). Thanks for your help in advance. This truck stumbles and loses power on light or heavy acceleration only when cold and also has lean codes set after a short couple of drives. I can drive a 1/2 a mile and stop and cut it off and restart and drive again and hav...
September 22, 2010
2000 Nissan Maxima GLE 3.0L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Poor Fuel Economy, MIL Lamp on VIN: JN1CA31D2Y
P0171: Fuel Trim Lean (Bank 1). When cold car will not run or accelerate bogs out and stalls after warmed up works better but not 100%,O2 sensors seem ok,Throttle position within perameters,mass air flow ok according to my scan tool
September 22, 2010
2001 Toyota Celica GT 1.8L No Start, Hesitation, MIL Lamp on VIN: JTDDR3T210
P0171: Fuel System Too Lean (Bank 1). Please help driving me nuts.This car came in with a po171 & po300.Cust. complaint is after hot soak vehicle is hard to start and feels like it won`t except fuel.Also check engine light.We found service bull for intake gasket leak.Replaced gasket problem st...
September 22, 2010
2000 Volkswagen Jetta GLS 2.0L MIL Lamp on VIN: 3VWSA29M7Y
P0171: System Lean. ... my ways. 2000 Jetta sets P0171. Smoke checked it thoroughly a week ago, nothing found. Fuel pressure was good, MAF Grams per second didn't come up to where it should be (measured about 2.5 at idle, 6 at 2500 in the shop, and 88 at 6000 in second going down...
September 25, 2010
1998 Toyota Camry LE 2.2L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 4T1BG22K9W
P0171: Fuel System Too Lean (Bank 1). Customer's complaint of surging, service engine soon lamp illuminated. Lack of power, poor fuel economy. No surprise with the AFR numbers displayed. Scoped O2 sensor, signal looks good. Can't call it the problem. Watched O2 volts on scanner (generic OBDII on...
September 29, 2010
2000 Volkswagen Jetta GLS 2.0L MIL Lamp on VIN: 3VWSA29M7Y
P0171: System Lean. ... my ways. 2000 Jetta sets P0171. Smoke checked it thoroughly a week ago, nothing found. Fuel pressure was good, MAF Grams per second didn't come up to where it should be (measured about 2.5 at idle, 6 at 2500 in the shop, and 88 at 6000 in second going down...
September 29, 2010