Coolant temperature signal missing in auto configuration
â–¶ How to fix
Contact an Allison dealer.
What you'll see
No driver-visible symptom recorded.
System reaction
The Allison fault code number is: P063F.The fault code is cleared automatically, when the vehicle has completed 40 start-up cycles without the fault being detected again.
Diagnostic depth
Detection
No information on coolant temperature available.
Possible cause
Can be due to a communication error on the CAN-bus.