Home › Land Rover › 2014 › Range Rover Base › Repair and Diagnosis › General Information › DTC Index › Diagnostic Trouble Code Index DTC: Body Control Module (BCM) -- Range Rover/L405 › Diagnostic Trouble Code Index DTC: Body Control Module (BCM) › Description And Operation › DTC B1B56-46: Sunroof Module - Calibration/parameter memory failure › Possible Causes