Diagnostic Aids
- An overheating condition may cause this DTC to set.
- After starting the engine, the engine coolant temperature should rise steadily, then stabilize after the thermostat opens.
- Test the ECT sensor at various temperature levels in order to evaluate the possibility of a skewed sensor. A skewed sensor can result in a driveability condition.
- Check for the proper operation of the engine cooling system.
- For an intermittent condition, refer to Symptoms - Engine Cooling .