Trailer Hitch

Fault code 0457

Vehicle electrical system control module (CAN comfort)

Diagnostic conditions
- Ignition on
- Trailer hitch control module, internal function test

Possible cause of fault
- No signal/communication (no signal from vehicle electrical system control module on CAN comfort)
- Read out fault memory (from vehicle electrical system control module)

Affected pins
Trailer hitch control module, plug B:
- Pin 8 'CAN comfort (low)'
- Pin 7 'CAN comfort (high)'

Diagnosis/troubleshooting