P0116

Tests 1 - 2:

Tests 3 - 6:

Tests 7 - 9:

SYMPTOM
P0116-ENGINE COOLANT TEMPERATURE PERFORMANCE

WHEN MONITORED
Engine OFF time is greater than 480 minutes. Ambient temperature is greater than 4 °C (39 °F).

SET CONDITION
After a calibrated amount of cool down time, the PCM compares the ECT Sensor, IAT Sensor and the Ambient Air Temperature Sensor values. If the ECT Sensor value is not within 2 °C (18 °F) of the other two temperature sensors an error is detected. Two Trip Fault.

POSSIBLE CAUSES
- Intermittent condition
- ECT sensor signal circuit shorted to battery voltage
- ECT sensor voltage below 1.0 volt
- ECT signal circuit open
- Sensor ground circuit open
- ECT sensor signal circuit shorted to ground
- ECT sensor signal shorted to sensor ground
- PCM high
- PCM low