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Service Engine Soon

This is a discussion on Service Engine Soon within the General Help forums, part of the LSx Technical Help Section category; My Service Engine Soon light has been on for a while. I don't know how to reset the mug....

  1. #1
    Junior Member
    Join Date
    Oct 2006

    2001 Trans Am

    Service Engine Soon

    My Service Engine Soon light has been on for a while. I don't know how to reset the mug.

  2. #2
    Pathelogical Liar BlackLT1Z28's Avatar
    Join Date
    Aug 2006

    94 Camaro Z28

    Did you check the codes to see if it was something serious?

  3. #3
    Senior Member
    Join Date
    Jul 2005
    Jacksonville, FL
    Go by Auto Zone and they'll read it for free, since it's been on a while might have a couple things going on. I'd recommend getting it read and posting the code(s), but if you want to try and reset it you can - some codes throw a light immediately, some take a few ignition cycles:

    PCM Reset
    Turn key on, don't start car
    Pull PCM BATT and PCM IGN fuses in engine compartment
    Wait 5-10 min
    Turn ignition off
    Replace fuses
    Idle will need a few minutes to relearn, and will reset all the readiness tests, so if you're trying to reset it to get through OBDII emissions testing you'll need to put some miles/cycles on it before getting tested - after fixing the problem.

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