DTC P061B-64: Internal Control Module Torque Calculation Performance - Signal plausibility failure: Action

Using the manufacturer approved diagnostic system check terrain optimization module for related DTCs and refer to the relevant DTC index
Using the manufacturer approved diagnostic system complete a CAN network integrity test
Refer to the appropriate system wiring diagrams and check the power and ground connections to the terrain optimization module
Check CAN harness between engine control module and terrain optimization module. Repair as necessary
Using the manufacturer approved diagnostic system check and install latest relevant level of software to the engine control module, clear the DTC and retest the system
Check and install a new engine control module as required