Possible Causes

WARNING: This page is about a different car, the 2017 Jaguar XJ, 2016 Jaguar XJ, 2015 Jaguar XJ, 2014 Jaguar XJ, and 2013 Jaguar XJ. However, it is still accessible from the selected car via links, so may be relevant.

High speed CAN bus failure
High speed CAN bus circuit, short circuit to ground, short circuit to power, open circuit
The powertrain control module has not received the expected CAN signal from the front audio control panel, button module within the specified time interval
CAN harness link between powertrain control module and front audio control panel, button module network malfunction