P0116

DTC P0116: ECT Sensor Range/Performance Problem

1. Turn the ignition switch ON (II).
2. Check the ECT SENSOR in the DATA LIST with the HDS.

Is about 176 °F (80 °C) or higher indicated?

YES - Go to step 3.

NO - Go to step 7.

3. Note the coolant temperature from step 2.
4. Turn the ignition switch OFF.
5. Cool the engine for 1 hour.
6. Check the ECT SENSOR in the DATA LIST with the HDS.

Did the ECT change 3.6 °F (2 °C) or more?

YES - Intermittent failure, system is OK at this time. Check the thermostat and the cooling system.

NO - Replace the ECT sensor.

7. Note the coolant temperature from step 2.
8. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
9. Check the ECT SENSOR in the DATA LIST with the HDS.

Did the ECT change 3.6 °F (2 °C) or more?

YES - Intermittent failure, system is OK at this time. Check the thermostat and the cooling system.

NO - Replace the ECT sensor.