LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Land Rover
>>
2017
>>
Range Rover SVAutobiography
>>
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
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Possible Causes
The rolling encryption code received during a central locking request is out of synchronization with the master code sequence
Door modules are not configured correctly