Conditions for Setting the DTC

The ECM detects a temperature difference at power-up that indicates that the ECT sensor is 30°C (54°F) more than the IAT sensor.
OR
The ECM detects a temperature difference at power-up that indicates that the ECT sensor is 16°C (29°F) more than the IAT sensor, and the time spent cranking the engine is more than 30 seconds, when the fuel level is more than 2.5 percent.
OR
The ECM detects a temperature difference at power-up that indicates that the ECT sensor is 16°C (29°F) more than the IAT sensor. Then the vehicle must be driven for more than 6 minutes and 40 seconds at more than 40 km/h (25 mph). If the IAT sensor then decreases more than 5°C (9°F), an engine block heater was detected and the test is aborted. If the IAT sensor does not decrease, an engine block heater was not detected and DTC P0116 will set.