Home › Jaguar › 2012 › XJ Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- XJ/X351 › Diagnostic Trouble Code (DTC) Index DTC: Transmission Control Module (TCM) › Description And Operation › Transmission Control Module (TCM) › DTC U0300-57: Internal Control Module Software Incompatibility - Invalid/incomplete software component › Possible Causes