DTC P0634-85: Control Module Internal Temperature "A" Too High - Signal above allowable range: Action
- Check powertrain control module for related DTCs and refer to relevant DTC index
- Refer to the electrical circuit diagrams and check connections are secure and wiring integrity
- Install a new powertrain control module, only when diagnosed as failed
- Using the Jaguar Land Rover approved diagnostic equipment, complete 'New Module - Powertrain control module - Diesel' routine
- Using the Jaguar Land Rover approved diagnostic equipment, complete 'Fuel lift pump' routine (0x4027_00)
- Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest