i threw a p0171
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This is a discussion on i threw a p0171 within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; system to lean i dont have a MBC or a CAI and im running cobb stage 2 map. it just ...

  1. #1
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    i threw a p0171

    system to lean

    i dont have a MBC or a CAI and im running cobb stage 2 map.

    it just came on, and i only drove about 10 miles with it on. i read somewhere that it could be caused by an 02 sensor? but i dont know


    any help here?
    vf22 Stage IIII wagon of DOOM

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  3. #2
    Registered User BlkWRXWag's Avatar
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    Check all your hoses. When my FPR hose came loose, I got the same thing.
    -Max.

    06 STU STI
    2006 STU Pro Solo Natl. Champ.
    www.zzyzxmotorsports.com

  4. #3
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    any hose inperticualr? would this hose effect boost at all?

  5. #4
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    did the CEL come back on after your cleared it?

  6. #5
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    i reset the ecu...and i cleaned my MAF, and drivng tonight i noticed the engine temp was a little cooler than normal.

    its normally a little lower than the middle, but nothing it was just a little higer than the second line(first line being bottom)???????
    vf22 Stage IIII wagon of DOOM

  7. #6
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    Quote Originally Posted by Mr_Ginzo
    did the CEL come back on after your cleared it?

    no, i only drove like 30 miles
    vf22 Stage IIII wagon of DOOM

  8. #7
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    okay so the cel came back on after 35 miles. same code.

    i dont know whats causing it....dirty injectors? something clogged? bad fuel?

    someone help
    vf22 Stage IIII wagon of DOOM

  9. #8
    Mace Windu devilfluff's Avatar
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    Possible causes...

    1- Exhaust leak- check for leaks at all connections and for cracks or holes
    2- Air intake leak- same as above on air intake, intercooler hoses, etc
    3- Low fuel pressure- are you due for a fuel filter? Is the pump good?
    4- Coolant temp sensor
    5- Manifold absolute pressure(MAP) sensor
    6- Intake air temp sensor

    If its any of the last 4, I'd recommend taking it to a shop for a proper diag... Unless you have the proper equipment to test the sensors and fuel pressure
    Dirty Jersey
    Part-Time Grammar Nazi
    RIP- '02 PSM Wagon
    08 Candy White MK5 GTI 6spd

    Moderator:Tri-State and Transmission & AWD forums

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