DTC P0116: ECT Circuit Problem: Condition

After vehicle has been cold soaked (turned off) for 6 hours, PCM monitors ECT sensor maximum and minimum value when engine is started and 5 minutes after starting engine. If ECT sensor maximum and minimum values vary less than 10°F, DTC is set. Causes may include the following:

• Faulty ECT sensor.
• Faulty connector.
• PCM malfunction.