Diagnostic Trouble Code
U0101 — Lost Communication with TCM
Lost Communication with TCM
Definition
Communication has been lost with the Transmission Control Module (TCM) on the CAN bus network. The ECM and TCM must communicate for proper shift strategy and torque management.
Common Causes
- Faulty TCM
- CAN bus wiring issue between ECM and TCM
- Blown TCM fuse
- Water damage to TCM or connectors
- Corroded CAN bus terminals