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P0171 Diagnostic Trouble Code Discussion for May 2008

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2000 Chevrolet Silverado 1500 4.3L Hesitation VIN: 1GCEC14W6Y
P0171: Fuel Trim System Lean (Bank 1). I need some help. THis truck came in comlaing of losing power. Fuel pressure is at 60 psi. O2 are reading around 30 mv @ idle and fuel trim is 190. If I unplug the maf the the o2 read around 800 mv and fuel trim run around 128. I have replaced the maf twice no...
May 08, 2008
2000 Saab 9-3 2.0L MIL Lamp on VIN: YS3DD35HOY
P0171: LTFT maxed out mixture too lean. This one showed up at my door with CEL on, no other complaint. Attempted to scan T7, "No system is available for this car", Repeated above for Trionic 7 and OBDII, for '99 models, and for '01 models, same results. Can get in with TechII in generic m...
May 19, 2008
2004 Ford Freestar 3.9L Poor Idle Quality, MIL Lamp on VIN: 2FTZA54634
P0171: bank 1 lean. after replacing esm, i double checked for vac leaks and egr/esm leaking @vent hole on new vlave. my question is, is this a programed or alowable leak? or should i get another valve? i called dealer but could get a straight answer and part manufacture they were...
May 20, 2008
2000 Toyota Corolla VE 1.8L lean condition VIN: 1NXBR12E4Y
P0171: Fuel System Too Lean (Bank 1). thanks to all in advance, this toyota came in with a 171 system lean, checked for vac leaks found small leak at intake replaced gasket cleaned throttle body and mass air flow, replaced 0-2 sensor somewhat slow, no exhaust leaks found, reset system code 171 res...
May 20, 2008
2004 Ford Freestar 3.9L Poor Idle Quality, MIL Lamp on VIN: 2FTZA54634
P0171: bank 1 lean. after replacing esm, i double checked for vac leaks and egr/esm leaking @vent hole on new vlave. my question is, is this a programed or alowable leak? or should i get another valve? i called dealer but could get a straight answer and part manufacture they were...
May 21, 2008
2002 Ford Explorer Postal 4.0L MIL Lamp on VIN: 1FMZU62E02
P0171: Lean bank 1. ... now it has an intermittant P0171. I have repaired all vacuum leaks (intake, egr, and pcv valve). The o2 sensors were replaced because of faulty heaters. MAF was missing the resistor when we first received this exploder. I'm at a loss since we can't get it ...
May 23, 2008
2003 Honda Pilot EX 3.5L Poor Fuel Economy VIN: 2HKYF18523
P0171: Fuel System Too Lean (Bank 1). This pilot came in with mil on and complaints of low fuel mileage. I did the basics, found that a tune up, decarb, egr cleaning, and timing belt were all due. The fuel pressure regulator and evap purge solenoid have also been done. My question is has anyone se...
May 28, 2008
2001 Nissan Sentra GXE 1.8L Hesitation, MIL Lamp on VIN: 3N1CB51A71
P0171: Fuel Trim Lean. Hi all, I've been working on this Sentra off and on for a few days now. Problem is it won't accelerate as if a catalyst were clogged. Runs up in neutral ok to about 4000 when it misses slightly, but won't produce much power in gear. Data stream looks ok except...
May 29, 2008
2003 Ford Ranger Edge 4.0L MIL Lamp on VIN: 1FTZR45E63
P0171: lean bank 1. I have 2 codes in this one. Lean bank 1 lean bank 2,fuel pressure and flow are good. No vacuum leaks found, intake plenum gaskets have been replaced. No egr to screw up. Long term fuel trim is 25% on both banks. At idle the short term fuel trim runs up to 18% ...
May 30, 2008
2000 Chevrolet Silverado 1500 4.3L Hesitation VIN: 1GCEC14W6Y
P0171: Fuel Trim System Lean (Bank 1). I need some help. THis truck came in comlaing of losing power. Fuel pressure is at 60 psi. O2 are reading around 30 mv @ idle and fuel trim is 190. If I unplug the maf the the o2 read around 800 mv and fuel trim run around 128. I have replaced the maf twice no...
May 08, 2008
2000 Saab 9-3 2.0L MIL Lamp on VIN: YS3DD35HOY
P0171: LTFT maxed out mixture too lean. This one showed up at my door with CEL on, no other complaint. Attempted to scan T7, "No system is available for this car", Repeated above for Trionic 7 and OBDII, for '99 models, and for '01 models, same results. Can get in with TechII in generic m...
May 19, 2008
2004 Ford Freestar 3.9L Poor Idle Quality, MIL Lamp on VIN: 2FTZA54634
P0171: bank 1 lean. after replacing esm, i double checked for vac leaks and egr/esm leaking @vent hole on new vlave. my question is, is this a programed or alowable leak? or should i get another valve? i called dealer but could get a straight answer and part manufacture they were...
May 20, 2008
2000 Toyota Corolla VE 1.8L lean condition VIN: 1NXBR12E4Y
P0171: Fuel System Too Lean (Bank 1). thanks to all in advance, this toyota came in with a 171 system lean, checked for vac leaks found small leak at intake replaced gasket cleaned throttle body and mass air flow, replaced 0-2 sensor somewhat slow, no exhaust leaks found, reset system code 171 res...
May 20, 2008
2004 Ford Freestar 3.9L Poor Idle Quality, MIL Lamp on VIN: 2FTZA54634
P0171: bank 1 lean. after replacing esm, i double checked for vac leaks and egr/esm leaking @vent hole on new vlave. my question is, is this a programed or alowable leak? or should i get another valve? i called dealer but could get a straight answer and part manufacture they were...
May 21, 2008
2002 Ford Explorer Postal 4.0L MIL Lamp on VIN: 1FMZU62E02
P0171: Lean bank 1. ... now it has an intermittant P0171. I have repaired all vacuum leaks (intake, egr, and pcv valve). The o2 sensors were replaced because of faulty heaters. MAF was missing the resistor when we first received this exploder. I'm at a loss since we can't get it ...
May 23, 2008
2003 Honda Pilot EX 3.5L Poor Fuel Economy VIN: 2HKYF18523
P0171: Fuel System Too Lean (Bank 1). This pilot came in with mil on and complaints of low fuel mileage. I did the basics, found that a tune up, decarb, egr cleaning, and timing belt were all due. The fuel pressure regulator and evap purge solenoid have also been done. My question is has anyone se...
May 28, 2008
2001 Nissan Sentra GXE 1.8L Hesitation, MIL Lamp on VIN: 3N1CB51A71
P0171: Fuel Trim Lean. Hi all, Iíve been working on this Sentra off and on for a few days now. Problem is it wonít accelerate as if a catalyst were clogged. Runs up in neutral ok to about 4000 when it misses slightly, but wonít produce much power in gear. Data stream looks ok except...
May 29, 2008
2003 Ford Ranger Edge 4.0L MIL Lamp on VIN: 1FTZR45E63
P0171: lean bank 1. I have 2 codes in this one. Lean bank 1 lean bank 2,fuel pressure and flow are good. No vacuum leaks found, intake plenum gaskets have been replaced. No egr to screw up. Long term fuel trim is 25% on both banks. At idle the short term fuel trim runs up to 18% ...
May 30, 2008