DTC U2012-02: Car Configuration Parameter(s) - General signal failure: Action

WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

Using the Jaguar Land Rover approved diagnostic equipment, re-configure the high speed CAN control modules with the latest level software
Using the Jaguar Land Rover approved diagnostic equipment check and up-date the car configuration file as required
Refer to the appropriate System Wiring Diagram(s) and check CAN circuits. Repair wiring harness as required
Check the body control module for related DTCs and refer to the relevant DTC index
Clear the DTC and re-test