Home › Land Rover › 2016 › LR4 Base › Repair and Diagnosis › Transmission › Transmission Control Systems › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- LR4/L319 › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) › Description And Operation › DTC U0300-57: Internal Control Module Software Incompatibility - Invalid/incomplete software component › Possible Causes