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P0171 Diagnostic Trouble Code Discussion for October 2014

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2006 Volkswagen Golf GTI 1.8T 1.8L Poor Idle Quality, Misfire, lean VIN: 9BWDE61J86
P0171: testing and results. This vehicle is a problem child! Misfires and runs lean only on cold starts for maybe 60 sec. Once secondary air pump turns off it will run perfect. I have changed every thing that was backed up by failed tests. The last thing was smoke testing for vacuum leak...
October 02, 2014
1997 Chrysler Concorde LX 3.5L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2C3HD56F6V
P0171: Fuel System Lean (Bank 1). thanks in advance this concord came in with a water pump pouring tour down and found motor block craked got a junk yard motor and put it in now it has a miss idle under load and driving st and lg term fuel adapt 24.8% maxed out checked egr apply vacume and mot...
October 06, 2014
2007 Chevrolet Avalanche LT 5.3L Excessive Emissions VIN: 3GNEC12J17
P0171: Fuel System Lean (Bank 1). avalanche came in for check engine light and traction control light and Stabilitrak light on short term fuel trim is 0-6long term fuel trims on both banks are max. a24 I replaced fuel pump I replace mass air flow downstream o2 sensors smoked engine for vacuum ...
October 07, 2014
2004 BMW X3 3.0i 3.0L MIL Lamp on VIN: WBXPA93404
P0171: 2882 Mixture prep Bank 1. Hello all! This vehicle first came to me in August for CEL diagnosis, when I found both lean faults and low fuel lean fault. Since the fuel level was in reserve with an estimated 30 miles of range, I cleared the faults, reset the adaptations, and advised the c...
October 08, 2014
1999 Toyota 4Runner SR5 3.4L Hesitation VIN: JT3HN86R2X
P0171: Fuel System Too Lean (Bank 1). ... has a TRD supercharger on it. It came in and had both oxygen/air-fuel sensor bad, replaced them. All was good. Customer drove it for a week and then MIL came on. P0171 codes in current, historic and pending. Smoke test no leaks, fuel pressure 44 psi at idl...
October 13, 2014
2001 Ford F-150 XL 4.2L Excessive Emissions, MIL Lamp on VIN: 1FTZX17221
P0171: . ... usually a BMW Mercedes guy so this one got me stumped. I need help from someone that really knows Ford. Please read everything I checked/changed or tested before giving me your valuable input. Bank 1 LTFT 14, Bank 2 LTFT -12. Its throwing P0171. The onl...
October 21, 2014
2006 Ford E-450 Super Duty 6.8L Stall VIN: 1FDXE45S46
P0171: system too lean bank 1 - history code. Good morning one and all this is a new customer, van is used for delivery of baked goods - aprox 200 miles a day. Problem: drivers complain of intermittent engine stall out, always at idle - foot off the accelerator pedal, usually when turning, sometimes just...
October 21, 2014
1997 Honda Prelude 2.2L MIL Lamp on VIN: JHMBB6240V
P0171: Fuel System Too Lean (Bank 1). ... one. somehow i am puzzled as to what is going with it. Car came with code p0171 and i confirmed O2 sensor not in the range according to honda repair procedure so i replaced it. it came back in couple of weeks with the same code. what i noticed is that shor...
October 23, 2014
2002 Toyota Camry SE 2.4L Poor Idle Quality, Hesitation, MIL Lamp on VIN: JTDBE32K12
P0171: Fuel System Too Lean (Bank 1). I have here an extreme lean condition that should be easy to diagnose, but is proving otherwise. The car has a hard start, slightly rough idle, and poor acceleration in open loop. In closed loop, the ltft is +45 and it runs better, but not great. If carb clean...
October 23, 2014
1997 Honda Prelude 2.2L MIL Lamp on VIN: JHMBB6240V
P0171: Fuel System Too Lean (Bank 1). ... one. somehow i am puzzled as to what is going with it. Car came with code p0171 and i confirmed O2 sensor not in the range according to honda repair procedure so i replaced it. it came back in couple of weeks with the same code. what i noticed is that shor...
October 24, 2014
2007 Chevrolet Avalanche LTZ 5.3L MIL Lamp on VIN: 3GNEC120X7
P0171: Fuel System Lean (Bank 1). Having problems with bank 1 running all the way to +30 trim on decel. You can not watch variable displacement system and fuel trims on the tech2 at the same time. I cannot absolutely verify this but it only seem to go lean like this when the variable displacem...
October 29, 2014
2005 Audi A4 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: WAULC68E65
P0171: To lean. The car runs good as long as it doesn't rain. Ok customer said on a day that is raining he will go out in the morning and start the car and it starts good and no check engine light on he starts going down the road car runs good until he steps on the brake and ...
October 30, 2014