DTC U0037-87: Vehicle Communication Bus B - Missing message: Action

WARNING: This page is about a different car, the 2019 Land Rover Range Rover Sport. However, it is still accessible from the selected car via links, so may be relevant.

Using the Jaguar Land Rover approved diagnostic equipment, inspect the snapshot data to determine the missing message source control module. Inspect the relevant control module for related DTCs and refer to the relevant DTC index. Inspect the module power supply circuit for failure, repair as necessary
Using the Jaguar Land Rover approved diagnostic equipment, perform a CAN network integrity test. Refer to the electrical circuit diagrams and inspect the high speed CAN bus (body) circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary