Retarder oil temperature
â–¶ How to fix
Check that the gearbox cooling system is working correctly. Check connections and cables according to the circuit diagram for the ZF automatic gearbox. Refer to Group 16.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Incorrect signal from the retarder oil temperature sensor.
Possible cause
The oil temperature is or has been above a certain level in the retarder, depending on the application.