DTC U0001-87: High Speed CAN Communication Bus - Missing message: Action

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

Refer to the electrical circuit diagrams and check the power and ground connections to the module
Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network
Using the manufacturer approved diagnostic system, identify the module(s) responsible for the erroneous CAN signals. Check these modules for related DTCs and refer to the relevant DTC index