Engine Error
U0101
Lost Communication with TCM
Severity
High
Symptoms
Transmission stuck in limp mode, harsh shifting, gear indicator blank
Common Causes
- Blown TCM fuse
- Corroded transmission connector
- Wiring damage to TCM
- Internal TCM failure
How to Fix
- 1 Check TCM fuses and relays
- 2 Clean and inspect TCM harness connector
- 3 Repair damaged CAN wiring
- 4 Replace Transmission Control Module
Estimated Repair Cost
USD
$20
–
$900
Wiring repair: $100 - $200; TCM replacement: $400 - $900