DTC P0116: ECT Sensor Circuit Range/ Performance Problem ('04-05 models)
- Turn the ignition switch ON (II).
- Check the ECT SENSOR in the DATA LIST with the HDS.
Is about 176°F (80°C) or more, or 0.86 V or less indicated?
YES -Go to step 3.
NO -Go to step 7.
- Note the coolant temperature from step 2.
- Turn the ignition switch OFF.
- Let the engine cool for 1 hour.
- 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, the system is OK at this time. Check the thermostat and the cooling system.
NO -Go to step 10.
- Note the coolant temperature.
- 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.
- Check the ECT SENSOR in the DATA LIST with the HDS.
Does the ECT change 3.6°F (2°C) or more?
YES -Intermittent failure, the system is OK at this time. Check the thermostat and the cooling system.
NO -Go to step 10.
- Turn the ignition switch OFF.
- Replace the ECT sensor (see ECT SENSOR/ECT SENSOR 1 REPLACEMENT ).
- Turn the ignition switch ON (II).
- Reset the ECM/PCM with the HDS.
- Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
- Allow the engine to cool to between 23°F (-5°C) and 77°F (25°C).
- Start the engine, and let it idle 20 minutes.
- Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0116 indicated?
YES -Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1.
NO -Go to step 18.
- Monitor the OBD STATUS for DTC P0116 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 17, go to the INDICATED DTCS TROUBLESHOOTING .
NO -If the screen indicates FAILED, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 15.