CAN Message T_MOT (Engine Temp) Invalid (FFh)

DTC P1884
CAN message T_MOT (Engine temp) invalid (FFh).

Possible cause:
^ Engine coolant temperature fault present in engine management ECM.

Engine Coolant Temperature Fault Present In Engine Management ECM.
CHECK THE FOLLOWING:
^ Read ECM fault codes and diagnose any temperature measurement faults.
POSSIBLE FAULTS
^ Fault codes set in engine management ECM.