DTC P0116: ECT Sensor Circuit Range/ Performance Problem (2000-2005 models)

NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
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?
1. YES - Go to step 3.
2. NO - Go to step 7.
Note the value of the ECT SENSOR in the DATA LIST with the HDS.
Turn the ignition switch OFF.
Cool the engine 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?
1. YES - Intermittent failure, system is OK at this time. Check the thermostat and the cooling system.
2. NO - Replace the ECT sensor.
Note the value of the ECT SENSOR in the DATA LIST with the HDS.
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.
Does the ECT SENSOR in the DATA LIST with the HDS.
Does the ECT SENSOR change 3.6°F (2°C) or more?
1. YES - Intermittent failure, system is OK at this time. Check the thermostat and the cooling system.
2. NO - Replace the ECT sensor.