DTC B12D4-51: Rolling Code Synchronization - Not Programmed: Action
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, 2016 Land Rover Range Rover, 2015 Land Rover Range Rover, and 2014 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Do NOT install a new Door module as this will NOT rectify the fault
- Using the Jaguar Land Rover Approved Diagnostic Equipment, perform routine - Immobilization. Clear the DTCs and retest
- Using the Jaguar Land Rover Approved Diagnostic Equipment, reconfigure all the door modules with the latest level software. Clear the DTCs and retest