Engine Coolant Temperature (ECT) Sensor: Notes
WARNING: This page is about a different car, the 2017 Jaguar XJ, 2016 Jaguar XJ, 2015 Jaguar XJ, 2014 Jaguar XJ, and 2013 Jaguar XJ. However, it is still accessible from the selected car via links, so may be relevant.
The Engine Coolant Temperature (ECT) sensors are Negative Temperature Coefficient (NTC) thermistors that allow the ECM to monitor the engine coolant temperature.
There are two identical ECT sensors installed, which are identified as ECT 1 and ECT 2. Each sensor is secured with a twist-lock and latch mechanism, and is sealed with an O-ring. A two pin electrical connector provides the interface between the sensor and the engine harness.