Overheating
â–¶ How to fix
Erase the fault code to unlock the control unit and test run the auxiliary heater. If necessary, renew the control unit.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Too many occurrences of overheating. The auxiliary heater control unit is locked.
Possible cause
The hardware value for the overheat sensor has been exceeded because the control unit has not detected fault codes 112 and 113.