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Thread: P12 crank sensor relearn unavailable?

  1. #1
    Junior Member
    Join Date
    Oct 2014

    Default P12 crank sensor relearn unavailable?

    I'm trying to do a crank relearn on an 05 Chevy Colorado with the i5 engine. But there is no p12 controller. Has anyone find a way to perform this?

  2. #2
    Lifetime Member Chevy366's Avatar
    Join Date
    Oct 2006


    Seems P12 support is gone in EFILive.
    I don't remember that it ever had the option to do crank relearn, EFILive will remember crank position.
    I need to do a full flash on a P12 but last time I tried it was a nightmare.
    Hate to say it but you might have to find someone with HPtuner.
    2005 1500 HD , Custom OS3 SD tune .
    2006 Trailblazer
    Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .

  3. #3
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003


    Try selecting LS1B for doing crank relearn.

  4. #4
    Lifetime Member
    Join Date
    Mar 2006


    Use LS1B 99-07 as the controller, the only time you need to do a Crank relearn is when you swap in a different PCM. The CKP data is stored in non-violate and never overwritten even with a full-flash.
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  5. #5
    Junior Member
    Join Date
    Oct 2014


    thanks for the help guys unfortunately no success on this so far. Probably will just use a tech ii

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