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Thread: New hp tunermpv12 pro

  1. #1
    Potential Tuner
    Join Date
    Jun 2020
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    1

    New hp tunermpv12 pro

    I have just altered donor vehicle harness for stand alone from 2006 Grand Prix GXP When I attempt to read e40 ecm I receive a protocol failure what I need to know is what circuits are required at OBD2 plug for reading of ecm. Im quessing I have missed something. Do I need can bus lines at OBD2 plug. I,m also not using tcm due to manual trans
    Last edited by RobertFCarr; 06-28-2020 at 11:27 AM.