DTC P0116 - ECT Sensor

WARNING: This page is about a different car, the 1996 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

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. 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.