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P0171 Diagnostic Trouble Code Discussion for May 2013

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2003 Pontiac Bonneville SE 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G2HX52K43
P0171: Fuel Trim System Lean. ... all to ponder over. The customer called and said his check engine light came on the other day 3 weeks after I fixed his MAF problem. When he dropped it I noticed that it idled really rough when I started it and kind of came out of it but was never really t...
May 01, 2013
2004 Infiniti G35 3.5L Poor Idle Quality, MIL Lamp on VIN: JNKCV51F14
P0171: Fuel Trim Lean (Bank 1). ... for years and this is the first time i have needed to post for help! We got this vehicle from another shop who had replaced the motor due to the motor seizing up. The junk yard motor that the other shop installed was misfiring and burning 3 liters of oil e...
May 07, 2013
2006 BMW 525i 3.0L MIL Lamp on VIN: WBANE53526
P0171: bank one system too lean. ... code P0171 & P0174 (Too lean banks 1 & 2). I have smoke tested the crankcase & intake system under pressure but no leaks found. I have replaced the MAF sensor & the crankcase vent valve but concern remains....
May 10, 2013
2005 Nissan Sentra 1.8L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 3N1CB51D25
P0171: Fuel Trim Lean. ... in from a used car dealer who is trying to get it to pass emissions so they can sell it. It has been worked on by many technicians. I am supposedly the sixth tech to work on it. When first got it it would not run very well and had a p0300 code and air fuel...
May 13, 2013
2004 Chrysler Sebring Touring 2.7L MIL Lamp on VIN: 1C3EL55R54
P0171: Fuel System Lean (Bank 1). ... & dies at idle. Had p0171, p0174 and a rear downstream Oxygen sensor code. Found the intake gaskets leaking vaccum. Replaced the upper and lower manifolds due to warping and rear downstream 0xygen sensor. Car runs fine no...
May 14, 2013
2001 Ford Escape XLT 3.0L MIL Lamp on VIN: 1FMCU04121
P0171: system too lean bank 1. This is one that would seem like a no brainer, and that's what I feel like today, that I have no brain. This fine example had been a problem child for a while now, setting codes, running poorly, and we got the running problems sorted out. In previous visits, ...
May 20, 2013
2009 Chevrolet HHR LT 2.2L MIL Lamp on VIN: 3GNCA23B59
P0171: Lean b1. ... job because dealer said it needed them and wanted us to change them which we did he supplied motor and trans not knowing what the problem was originally but he came back a week later with a SES on and p0171 and he said that's the same code it had before th...
May 24, 2013
1999 Isuzu N NPR 5.7L Hesitation VIN: 4KLC4B1R1X
P0171: lean bank 1. Help!!! this truck has no power. Feels like a plugged cat, bad air flow meter, dirty air flow sensor, low fuel pressure. It has codes for lean condition 171 & 174. The fleet mechanic replaced distributor, 2 fuel pumps, air flow meter, and substituted a goo...
May 27, 2013
2009 Chevrolet HHR LT 2.2L MIL Lamp on VIN: 3GNCA23B59
P0171: Lean b1. ... job because dealer said it needed them and wanted us to change them which we did he supplied motor and trans not knowing what the problem was originally but he came back a week later with a SES on and p0171 and he said that's the same code it had before th...
May 29, 2013
2003 Mercury Marauder 4.6L Hesitation, MIL Lamp on VIN: 2MEHM75V33
P0171: Freze frame showed long fuel trim at 28 and fuel pressure was 56psi at 17 mph. Sets at random. When driving fuel pressure will deep as low as 15 psi under accel on the mechanical fuel gage hooked in line. Main question is while does fuel pressure change so drastically when hot even at idle? whats good fuel pressure for this car?
May 29, 2013
1996 Saab 900 SE Turbo 2.0L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: YS3DF75N9T
P0171: system too lean. ... comes and goes. The oxygen sensor is not switching according to the ecu. 3 upstream oxygen sensors all do not switch properly and mostly sits at .49v. The flow chart for p1171 says to take a 1.5v battery to check the s...
May 31, 2013