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Thread: hp tuner can't connect to ecu

  1. #1
    Potential Tuner
    Join Date
    Mar 2019
    Posts
    1

    hp tuner can't connect to ecu

    hp tuner won't connect to ecu. error protocol not detected. I have removes both radio fuses still no avail. tried a good used ecu same issue. handheld scanner won't connect either.

  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,533
    Sounds like an issue at your OBD2 port. Get a wiring diagram for your connector and start checking for power/ground and your signal to the computer.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.