Home › Land Rover › 2014 › Range Rover Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Occupant Classification Sensor Control Module -- Range Rover/L405 › Diagnostic Trouble Code Index DTC: Occupant Classification Sensor Control Module › Description And Operation › DTC U201A-54: Control Module Main Calibration Data - Missing calibration › Possible Causes