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P0171 Diagnostic Trouble Code Discussion for July 2009

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2000 Infiniti I30 3.0L MIL Lamp on VIN: JNKCA31A1Y
P0171: Fuel Trim Lean (Bank 1). After above related work the MIL light returned and displayed the PO171 code. Researched database and recomendedto replace the air mass sensor and reprogram ECU as per ITSB01-029, A & C. Previously the Snap-on Solus displayed B1 and B2 A/F alpha figures of...
July 01, 2009
2001 Ford Windstar SE Sport 3.8L Poor Idle Quality VIN: 2FMZA57411
... fell on its face no power/ would idle but no throttle response towed to shop pulled codes p0171/p0174 lean both banks replaced upper and lower intake gaskets no change put reman maf in no change put new coil pack in same,put...
July 02, 2009
1998 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNCS13W2W
P0171: Fuel System Lean (Bank 1). replaced leaking fuel pressure regulator for hard to start problem and fixed that . next day set system too lean codes . cleared pcm of codes and unhooked battery for 5 min. to see if computor just need to adapt to repair. no help. tried mass air flow no help....
July 03, 2009
1999 Lexus RX300 3.0L MIL Lamp on, No shift at times VIN: JT6HF10U4X
P0171: Lean condition. ... code P0171 the oxygen sensor, I turned the light off and told the customer to come back if the light comes on again. So after several months, the light was on again the same code P0171 Lean condition and this time the custom...
July 06, 2009
2001 Subaru Outback 2.5L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 4S3BH66521
P0171: Fuel System Too Lean (Bank 1). This one keeps setting a p0171 and has a hesitation with a rough idle. LTFT is maxed at 25%. Called dealership and verified recall has been done. I have replaced the A/F ratio sensor twice. First time was aftermarket and code came back next day. Replaced with ...
July 09, 2009
1997 Oldsmobile Achieva S 2.4L Excessive Emissions, MIL Lamp on VIN: 1G3NL52T9V
P0171: Fuel System Lean. Runs rough (rich condition). SES light on, PO171 Lean Bank 1 Sensor 1. No vacuum leaks. KOEO both O2's read .5. After 1 minute running, front O2 reads 0, rear O2 reads .900 (rich). Replaced front O2, ECM, wire from O2 to ECM, and ground wire (ECM to ground). N...
July 13, 2009
1998 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNCS13W2W
P0171: Fuel System Lean (Bank 1). replaced leaking fuel pressure regulator for hard to start problem and fixed that . next day set system too lean codes . cleared pcm of codes and unhooked battery for 5 min. to see if computor just need to adapt to repair. no help. tried mass air flow no help....
July 18, 2009
2001 Ford Focus ZTS 2.0L Poor Idle Quality, Surge, Cuts out, Stall, MIL Lamp on VIN: 1FAFP38371
P0171: bank 2 lean. ... start. Replaced the battery. The next day the engine light came on with a continuous memory p0171 code. Ran koeo and koer tests and code did not show. Cleared code and car went bye bye. Two days later it came back with the same code. at that time I reset t...
July 20, 2009
2001 Volkswagen Passat GLX 4 Motion 2.8L MIL Lamp on VIN: WVWTH63B41
P0171: system to lean b1. Hello all, having trouble with lean codes setting not making sense. Have +25% fuel trim values short term trim yet long term trim never changes from opposite -20%. If short term is increasing fuel why isn't it affecting this passat long term trim pulling value...
July 20, 2009
2003 Hyundai Santa Fe GLS 3.5L MIL Lamp on VIN: KM8SC13EX3
P0171: Fuel System Too Lean (Bank 1). car came to me from another shop. po171 lean exhaust code, vehicle runs good. clear codes, scanner reads all 4 o2 sensors 0 voltage, short term and long term fuel trims -100 both banks. o2's all have battery power. any ideas?
July 21, 2009
1998 Jeep Grand Cherokee Laredo 4.0L Excessive Emissions, Poor Fuel Economy VIN: 1J4GZ58S1W
P0171: Fuel System Lean (Bank 1). ... Straight engine not a V6 or V8. It has done 150,171 miles.The problem that i am experiencing is that the engine is Misfiring when idle and it has been consuming too much fuel and it is giving out smoke on it exhaust. The Diagnose scanner read Code P0171 sy...
July 25, 2009
1998 Jeep Grand Cherokee Laredo 4.0L Excessive Emissions, Poor Fuel Economy VIN: 1J4GZ58S1W
P0171: Fuel System Lean (Bank 1). ... Straight engine not a V6 or V8. It has done 150,171 miles.The problem that i am experiencing is that the engine is Misfiring when idle and it has been consuming too much fuel and it is giving out smoke on it exhaust. The Diagnose scanner read Code P0171 sy...
July 26, 2009
2004 Volkswagen Jetta GLS 1.8L MIL Lamp on VIN: 3VWSE69M34
P0171: . i have a p0171 i cheked for vacuum leaks no leaks.my short fuel trims are high.my mass air flow is ok swoped it with a good one from another car we have with ap0411 that keeps on setting aswell no vacuum leaks i put a used secondary injector pump now the pump ...
July 27, 2009