DTC P0116: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance Problem

Start engine. Hold engine speed at 3000 RPM under no load condition with transaxle in Neutral or Park until radiator fan comes on, then allow engine to idle. Using scan tool, check ECT sensor reading. If reading is 176-200°F (80-93°C), problem is intermittent. System is okay at this time. Check cooling system and thermostat. If reading is not 176-200°F (80-100°C), check cooling system and thermostat. If cooling system and thermostat are okay, replace ECT sensor. Perform final procedure. See FINAL PROCEDURE  .