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P0171 Diagnostic Trouble Code Discussion for June 2014

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2003 Ford F-150 XL 4.2L Poor Idle Quality, Hesitation, MIL Lamp on
P0171: lean bank 1. The engine had a very rough idle especially after you put it in drive. We installed the lower and upper intake gaskets we started it up and it still had a rough idle. We saw the passenger side front catalytic converter red hot. We replaced it. After we did the...
June 02, 2014
2007 Cadillac SRX 4.6L MIL Lamp on VIN: 1GYEE63AX7
P0171: Fuel Trim System Lean (Bank 1). ... have a 2007 cadillac srx that has p0171 and 0174 codes. Long term adaptives are in the high teens short term hanging around 8 to 10. I replaced the common boot about 3 months ago the vehicle runs fine . One thing i noticed when you raise rpm,s above 2500 a...
June 09, 2014
2007 Cadillac SRX 4.6L MIL Lamp on VIN: 1GYEE63AX7
P0171: Fuel Trim System Lean (Bank 1). ... have a 2007 cadillac srx that has p0171 and 0174 codes. Long term adaptives are in the high teens short term hanging around 8 to 10. I replaced the common boot about 3 months ago the vehicle runs fine . One thing i noticed when you raise rpm,s above 2500 a...
June 13, 2014
2002 Lexus ES300 3.0L high idle VIN: JTHBF30G42
P0171: Fuel System Too Lean (Bank 1). I am not sure what to do with this car. Once in while it will rev to 2,500 rpm and stay there. When this happens the temp gauge goes to zero. It revs sometimes, just when the car has been idling, with no one in the car! Any suggestions would be helpful.
June 13, 2014
2002 Toyota Corolla CE 1.8L MIL Lamp on VIN: 2T1BR12E82
P0171: Fuel System Too Lean (Bank 1). ... code P0171. I've done all the usual stuff. Replaced MAF and Front O2 with dealer parts.Smoked intake (no leaks) but replaced gasket anyway. Replaced PCV and Spark plugs. Removed all injectors and inspected them, and did fuel injection service 2 times. Fuel...
June 13, 2014
2004 Ford Freestar SES 3.9L Poor Idle Quality, Misfire
P0171: system too lean bank 1. this one is getting to me. as stated running lean at idle only. highway cruise fuel trims are + or - 3. off idle fuel trims are good also.fuel rail pressure sensore reads 7 psi higher than gauge. if i increase pump duty cycle pressure comes up to 75, however l...
June 16, 2014
2005 Jaguar Vanden Plas 4.2L MIL Lamp on, loss of power VIN: SAJWA82C95
P0171: System lean bank 1. ... have a few questions.. We have this 2005 Jaguar 4.2l non-supercharged engine, that keeps setting codes P0171 and P0174, system lean bank 1 & 2. We performed all the basic tests and verified fuel pressure is in spec (57-60psi)at the fuel rail. We have s...
June 23, 2014
2000 Toyota Corolla VE 1.8L MIL Lamp on VIN: 1NXBR12E4Y
P0171: Fuel System Too Lean (Bank 1). got this corolla with engine light on runs great but the po 171code keeps poping on it had a 02 sensor by another shop the freeze frame reads like this intake air temp 96, coolant temp 179, stft 15.6 ltft 19.5 , vehicle s[peed0 , rpm 933 we tried a maf sensor ...
June 25, 2014
2001 Ford Taurus SE 4-Valve 3.0L Poor Idle Quality, Misfire
P0171: lean bank 1. I need some help with this problem child. This car runs but misfires badly and running lean. Already did leaking intake gaskets and resmoked multiple times no more leaks found Besides the small holes in egr valve replaced with new same thing. This car misfires...
June 26, 2014
2001 Ford Taurus SE 4-Valve 3.0L Poor Idle Quality, Misfire
P0171: lean bank 1. I need some help with this problem child. This car runs but misfires badly and running lean. Already did leaking intake gaskets and resmoked multiple times no more leaks found Besides the small holes in egr valve replaced with new same thing. This car misfires...
June 28, 2014