DTC P0606-94: Control Module Processor - Unexpected operation: Action

WARNING: This page is about a different car, the 2018 Jaguar XF, 2017 Jaguar XF, and 2016 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

Check battery is in fully charged and in a serviceable condition using a battery tester and the BATTERY AND CHARGING SYSTEM - GENERAL INFORMATION -- XF/X260 .
Refer to the appropriate system wiring diagrams and check the power and ground connections to the module
Clear the DTC and test drive the vehicle including at least five ignition cycles. Check for DTCs. If DTC is not present return to customer. If DTC repeatedly returns, check and install a new powertrain control module as required. Using the Jaguar Land Rover approved diagnostic equipment, configure the powertrain control module as a new module