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MX900 communication problem

74 Views 2 Replies Latest reply: 2025-12-07 10:47:35


  •   Level 1   
    (5) points
    steven ottersberg
    2025-12-06 22:25:05
      I can not perform any diagnostics with my 2022 Silverado duramax L5P.  It only gives me the error message "Detect limits exceeded Incorrect power mode:

    Tags: MX900

    Reply

  •   Level 10   
    (7944) points

    2025-12-07 10:45:12 (Reply to:steven ottersberg)

    Hi, the reason why could be gm cars are protected with SGW(secured gateway)
    Reply

  •   Level 10   
    (7944) points

    2025-12-07 10:47:35 (Reply to:steven ottersberg)

    So if you do not have a gm tech device or autoauth prescription you can only be
    serviced by a dealer.
    Reply
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