DTC P0116:00: Notes

DTC P0116:00	ECT sensor circuit range/performance problem
DETECTION CONDITION	The PCM monitors the maximum value and minimum value of engine coolant temperature when the engine is started and 5 min have been passed after leaving the vehicle 6 h or more . If difference between maximum and minimum values of engine coolant temperature is below 6 °C {43 °F} the PCM determines that there is an ECT circuit range/performance problem. Diagnostic support note This is a continuous monitor (engine cooling system). The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	ECT sensor connector or terminal malfunction PCM connector or terminal malfunction ECT sensor malfunction Thermostat malfunction PCM malfunction