DTC P0116: Engine Coolant Temperature Sensor Range/Performance Problem

Start engine and run at 3000 RPM with no loads and transmission in Park or Neutral until radiator fan comes on. Allow engine to idle. Check Engine Coolant Temperature (ECT) sensor using scan tool. If 176-200°F (80-93°C) or 0.4-0.7 volt is indicated, problem is intermittent. System is okay at this time. Check thermostat and cooling system. If 176-200°F (80-93°C) or 0.4-0.7 volt is not indicated, check thermostat and cooling system. If thermostat and cooling system are okay, replace ECT sensor.