P0116
DTC P0116: ECT Sensor Range/Performance Problem1. 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, or 0.86 V or less indicated?
YES - Go to step 3.
NO - Go to step 7.
3. Note current coolant temperature.
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.
Does the ECT change 5.4 °F (3 °C) or more?
YES - Intermittent failure, system is OK at this time. Check the thermostat and the cooling system.
NO - Go to step 10.
7. Note current coolant temperature.
8. Start the engine. Hold the engine speed at 3,000 rpm with no 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.
Does the ECT change 5.4 °F (3 °C) or more?
YES - Intermittent failure, system is OK at this time. Check the thermostat and the cooling system.
NO - Go to step 10.
10. Turn the ignition switch OFF.
11. Replace the ECT sensor.
12. Turn the ignition switch ON (II).
13. Reset the PCM with the HDS.
14. Do the PCM idle learn procedure.
15. Allow the engine to cool to between 19 °F (-7 °C) and 86 °F (30 °C).
16. Start the engine, and let it idle for 20 minutes.
17. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0116 is indicated, check for poor connections or loose terminals at the ECT sensor and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Go to step 18.
18. Monitor the OBD STATUS for DTC P0116 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the ECT sensor and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 15 and recheck.