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Thread: PO315 Code

  1. #1
    Tuner in Training
    Join Date
    Jan 2017
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    39

    PO315 Code

    I have done the crank trigger relearn a few times now. It says successful on relearn but check engine never goes away.

  2. #2
    Potential Tuner
    Join Date
    May 2019
    Posts
    8
    I just posted the same thing in misc. What vehicle ?

  3. #3
    Tuner in Training
    Join Date
    Jan 2017
    Posts
    39
    2016 Ford Mustang GT

  4. #4
    Potential Tuner
    Join Date
    May 2019
    Posts
    8
    Yeah I'm having it on 2011

  5. #5
    Tuner in Training
    Join Date
    Jan 2017
    Posts
    39
    Going to try returning to stock and run relearn and then load adjusted tune and try and reset.

  6. #6
    same issue here; usually goes away after a few weeks

  7. #7
    Advanced Tuner
    Join Date
    Feb 2012
    Location
    TEXAS
    Posts
    239
    if the re-learn continues to post check engine light check these Possible causes, Faulty Crankshaft Position (CKP) Crankshaft Position (CKP) sensor harness is open or shorted Crankshaft Position (CKP) sensor circuit poor electrical connection Damaged crankshaft pulse wheel teeth. you could also try using an SCT device if you know someone that has one..

  8. #8
    Tuner in Training
    Join Date
    Jan 2017
    Posts
    39
    Okay guys I put stock tune back in car and did a crank relearn and was able to clear the check engine light. So I don't know why it worked but it did.