Possible Causes
NOTE:
Monitor description.
The engine control module will set a DTC if the engine off time calculated from the global time in the instrument cluster/central junction box is less than 1hr, when the shutdown temperature was fully warm, and the coolant 1 temperature at start is significantly cooled down to ambient temp
- The engine control module has determined failures where some circuit quantity, reported via serial data, is below a specified range
- Vehicle battery has been isolated and the global time does not increment. Warm coolant has been replaced with cold coolant
- Rapid engine temperature cooling with rapid ambient temperature rise