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Home › Fiat › 2017 › 500 Pop, Automatic Trans › Repair and Diagnosis › Transmission › Automatic Trans › (Transmission Control Module (TCM) - Electrical Diagnostics - 500) › DTC Troubleshooting › U0077-00 Control Module Communication Bus Off › Set Condition

Set Condition

The Transmission Control Module (TCM) Module has detected catastrophic failure on the CAN bus.

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