Home >> Land Rover >> 2014 >> Range Rover Base >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Driver/Passenger Door Module (DDM/PDM) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Driver / Passenger Door Module (DDM / PDM) >> Description And Operation >> DTC B12D4-51: Rolling Code Synchronization - Not Programmed >> Possible Causes