Home › Land Rover › 2017 › Range Rover Sport HSE Dynamic › Repair and Diagnosis › Restraints › Restraints Control Systems › Diagnostic Trouble Code Index DTC: Restraints Control Module (RCM) -- Range Rover Sport/L494 › Diagnostic Trouble Code Index DTC Restraints Control Module (RCM) › Description And Operation › DTC U201B-57: Control Module Calibration Data #2 - Invalid/Incomplete software component › Possible Causes