Control Unit Faulty

U0404

Diagnosis information - Selector lever

Control unit faulty

Diagnostic conditions
The control unit must be active in order to be able to test internal function sequences and diagnosable inputs/outputs.

In the event of a fault, check to ensure that the diagnosis object is faulty. Check whether the fault is permanently [present], erase the fault memory, satisfy diagnosis conditions and read out the fault memory again.
- Ignition on

Fault setting condition(s)
- Internal hardware fault in CAN controller
- Internal sensor voltage implausible
- Internal key-lock signal implausible