Home › Jaguar › 2012 › XKR-S 2D Convertible › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- XK/X150 › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) › Description And Operation › Transmission Control Module [TCM] › DTC P0601-41: Internal Control Module Memory Check Sum Error - General checksum failure › Possible Causes