DTC B1479-08: Power Supply Distribution Box - Bus signal/message failures: Action

WARNING: This page is about a different car, the 2018 Jaguar XF, 2017 Jaguar XF, and 2016 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

Refer to the appropriate system wiring diagrams and check the LIN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs, lock the vehicle and wait 2 minutes. Unlock the vehicle and retest. If the fault persists, install a new power supply distribution box