Timeout on TCU4 message on CAN
â–¶ How to fix
Check CAN connections, connectors and cable harnesses. Also check the engine control unit.
What you'll see
No driver-visible symptom recorded.
System reaction
Not possible to change gear.
Diagnostic depth
Detection
Timeout on reception of the TCU4 message.
Possible cause
If the TCU4 message is missing, this fault code is generated.