DTC P0634-98: Control Module Internal Temperature "A" Too High - Component or system over temperature: Action
NOTE:
This DTC may log due to aggressive driving or holding the transmission in a fixed gear. Check for other related DTCs
- Refer to the relevant section of the workshop manual and check the automatic transmission fluid level. Rectify as necessary
- Check the automatic transmission cooling system for obstruction/damage/blockage. Rectify as necessary