DTC U0001-88: High Speed CAN Communication Bus - Bus off: Action

WARNING: This page is about a different car, the 2021 Land Rover Range Rover and 2020 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.

Refer to the appropriate service information and check the high speed CAN bus (chassis) circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary, clear the Diagnostic Trouble Code(s) and retest