DTC P0634-85: Control Module Internal Temperature "A" Too High - Signal above allowable range: Action

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

Using the Jaguar Land Rover approved diagnostic equipment, re-configure the powertrain control module with the latest level software and retest. If the fault persists, install a new powertrain control module