Code P014, Shorted Engine Coolant Temperature (ECT) Sensor: Notes
WARNING: This page is about a different car, the 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
ECT sensor is located on thermostat housing. ECT sensor signal is on circuit No. 410. Sensor ground is on circuit No. 808. As sensor temperature increases, resistance decreases. A high coolant temperature will result in low signal voltage on circuit No. 410. Code P014 sets because engine coolant temperature cannot be greater than 296°F (147°C) when intake air temperature is less than 212°F (100°C).