Home › Jaguar › 2017 › XF S, RWD › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Transfer Case Control Module (TCCM) -- XF/X260 › Diagnostic Trouble Code Index DTC: Transfer Case Control Module (TCM) › Description And Operation › Transfer Case Control Module (TCM) › DTC P0634-68: Control Module Internal Temperature A Too High - Event information › Possible Causes