DTC U0028-88: Vehicle Communication Bus A - Bus off: 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 manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the applicable SYSTEM WIRING DIAGRAM(S) and check the high speed CAN bus (powertrain) circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary