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P0171 Diagnostic Trouble Code Discussion for March 2015

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
1997 Saab 900 SE Turbo 2.0L MIL Lamp on VIN: YS3DF78N6V
P0171: Too lean. This vehicle cam in with a P1171 and P0171. System too lean. The vehicle is MAP sensor only no MAF. Fuel trims are reading at about 24% at idle. Of idle they seem to be just fine. Checked Map sensor and its reading around 37kpa which is slightly high but not c...
March 05, 2015
2003 Toyota Corolla CE 1.8L MIL Lamp on, Lean Condition VIN: JTDBR32EX3
P0171: Fuel System Too Lean (Bank 1). This car came in with a P0171 code indicating a lean condition. The long term fuel trim at idle was +25% and the short term varied between 2% and 3%. While watching the short term fuel trim on the live data with the engine running in closed loop I sprayed brak...
March 09, 2015
2009 Volkswagen Passat Komfort 2.0L Misfire VIN: WVWJK73C29
P0171: Lean. ... worthless,but i could be wrong? anyways the thing came in with p0171 lean and p0302 misfire on cylinder two and p0304 cylinder four, problem was intermittent so i check the o2 sensor voltage and it was reading very low,so i...
March 09, 2015
2006 Honda Accord EX 2.4L Poor Idle Quality, VIN: 1HGCM56806
P0171: Fuel System Too Lean (Bank 1). Hi guys have a bit of a head scratcher. This Honda came in with fuel trims up in the +25% short term +11% long term. did all of the standard vacume leak tests with smoke and carb clean. no difference. adjusted the valves, replaced air flow meter, checked the a...
March 10, 2015
2005 Suzuki Verona LX 2.5L MIL Lamp on VIN: KL5VJ56L05
P0171: Fuel System Too Lean (Bank 1). Hey everyone, I could use a little help with this Suzuki. It can to me because it failed state inspection and the cel was on. Testing showed lean both banks. 02's looked like they were switching and stft numbers were hovering around 0. Ltft however at idle wer...
March 11, 2015
2005 Chrysler Sebring Limited 2.7L MIL Lamp on VIN: 1C3EL65RX5
P0171: Fuel System Lean (Bank 1). LTFT raise to +33 on both banks at idle and under load (cold or warm). Pending codes set within 30 seconds of engine running, check engine light illuminates on second drive cycle. Engine idles smoothly. Very slight hesitation present on acceleration, though po...
March 17, 2015
2002 Ford Focus LX 2.0L Poor Idle Quality, Surge, MIL Lamp on VIN: 1FAFP33P42
P0171: system lean ban 1. high every body, thanks for your time and help, I have this 02 ford focus that customer replaced air flow sensor, and rear O2 sensor, the problem is the engine always is running lean, when I started to check, long ft was on 35. did the computer reset by scanne...
March 17, 2015
2006 Honda Accord EX 2.4L Poor Idle Quality, VIN: 1HGCM56806
P0171: Fuel System Too Lean (Bank 1). Hi guys have a bit of a head scratcher. This Honda came in with fuel trims up in the +25% short term +11% long term. did all of the standard vacume leak tests with smoke and carb clean. no difference. adjusted the valves, replaced air flow meter, checked the a...
March 17, 2015
2006 Land Rover Range Rover HSE 4.4L MIL Lamp on VIN: SALMF15476
P0171: lean bank 1. ... jag techs this rover had leaking valve covers we replaced both valve covers and gaskets with Oem parts. After it had the lean codes p0171 p0174. At idle fuel trim spikes to 20% when revved fuel trim drops to 5%. I smoke tested intake and engine and found n...
March 17, 2015
2012 Chevrolet Sonic LT 1.4L Surge, MIL Lamp on VIN: 1G1JD6SB3C
P0171: System too lean. Vehicle brought in for check engine light. After road test found an uneven idle and a slight surge on light acceleration. Ran flow chart and didn't lead to a concrete fix. Acts almost like a vacuum leak but didn't turn up any problems when check for leaks. Any...
March 18, 2015
2005 Chrysler Sebring Limited 2.7L MIL Lamp on VIN: 1C3EL65RX5
P0171: Fuel System Lean (Bank 1). LTFT raise to +33 on both banks at idle and under load (cold or warm). Pending codes set within 30 seconds of engine running, check engine light illuminates on second drive cycle. Engine idles smoothly. Very slight hesitation present on acceleration, though po...
March 18, 2015
2001 Ford Explorer Sport Trac 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMZU77E51
P0171: Bank 1 lean. ... exhibits a very rough high idle at around 1500rpm. It goes away with light acceleration. Mil lamp is on but only for p0171(bank 1 lean). Occasionally will also have misfire code but very sporatic and never the same cylinder. I have sprayed entire engine wi...
March 26, 2015
2005 Kia Sportage LX 2.7L MIL Lamp on VIN: KNDJF72385
P0171: Fuel System Too Lean (Bank 1). This car runs perfect under all conditions, but sets fuel system lean codes. Fuel pressure steady at 52 psi@ all times.STFT only goes high on normal acceleration. DTC sets when LTFT reaches 14.5. Fuel volume is good(32 ounces in (10 seconds). Upstream O2's peg...
March 26, 2015
2002 Ford F-150 King Ranch 4.6L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1FTRX17WX2
P0171: Lean bank 1. ... into this problem and fixed it I be grateful for the fix. The truck came in as a no start, It had P305, P0171 , P0174 codes in the computer.It magically started when I go in to start it, but ran with a bad miss. First thing...
March 29, 2015
2005 Chevrolet Silverado 1500 LS 5.3L Poor Idle Quality, Surge, MIL Lamp on VIN: 2GCEK13T35
P0171: Fuel Trim System Lean (Bank 1). Have replaced lower intake gaskets, has been tuned up. Ran smoke test leaking around fuel inj. replaced O-rings didn't run any better still lean. Also seems to run good cold doesn't surge. surges at idle hot thanks for any help.
March 30, 2015
2002 Ford F-150 King Ranch 4.6L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1FTRX17WX2
P0171: Lean bank 1. ... into this problem and fixed it I be grateful for the fix. The truck came in as a no start, It had P305, P0171 , P0174 codes in the computer.It magically started when I go in to start it, but ran with a bad miss. First thing...
March 31, 2015