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

NOTE: If DTCs P0117 and/or P0118 are present, troubleshoot them before DTC P0116.

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 ECT sensor using scan tool. If 176-200°F (80-93°C) is indicated, problem is intermittent. System is okay at this time. Check cooling system. If ECT sensor temperature indicated is not as specified, check cooling system. If cooling system is okay, replace ECT sensor.