DTC P0116: Engine Coolant Temperature (ECT) 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. Using scan tool, check ECT sensor. If 176-200°F (80-93°C) is indicated, problem is intermittent. System is okay at this time. Ensure thermostat and cooling system are operating properly. If ECT sensor temperature indicated is not as specified, check thermostat and cooling system. If thermostat and cooling system are okay, replace ECT sensor.