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

NOTE: Monitor description. DTC is set if a software reset has occurred for an abnormal reason

Check battery is in fully charged and in a serviceable condition using a battery tester and the BATTERY & CHARGING SYSTEM - GENERAL INFORMATION -- LR4/L319
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 new engine control module as required