Software Incompatibility with TCM
A control module has detected that its software/calibration is incompatible with the transmission control module. Often appears after a TCM swap or partial flash.
Affected components
- Tcm
- Control module
Common causes
- High likelihood: Software/calibration mismatch with TCM
- Medium likelihood: Used TCM from different vehicle fitted
- Low likelihood: Gateway module routing CAN messages incorrectly
Possible symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.