P0606-94: Control Module Processor - Unexpected operation: 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.

Check battery is in fully charged and in a serviceable condition using a battery tester and battery care manual
Refer to the applicable SYSTEM WIRING DIAGRAM(S) 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 engine control module as required