DTC P0116 - Engine Coolant Temp Sensor Range/PERF Problem

Start engine. Raise and hold engine speed to 3000 RPM with transmission in Park or Neutral until radiator cooling fan comes on. Let engine idle. Using scan tool, check ECT data. If 176-194°F (80-90°C) is indicated, problem is intermittent. System is okay at this time. Check cooling system. If 176-194°F (80-90°C) is not indicated, check cooling system. If cooling system is okay, replace ECT sensor.