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U0079: Control Module Communication Bus G Off

What Does U0079 Mean?

U0079 is a diagnostic trouble code indicating: Control Module Communication Bus G Off. This code relates to the network communication system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

What To Do Next

  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

U0074 Control Module Communication Bus B Off U0075 Control Module Communication Bus C Off U0076 Control Module Communication Bus D Off U0077 Control Module Communication Bus E Off U0078 Control Module Communication Bus F Off U0080 Vehicle Communication Bus F U0081 Vehicle Communication Bus F Performance U0082 Vehicle Communication Bus F + Open