Engine Oil Temperature Sensor

If the IAT sensor fails, or is disconnected, the vehicle will continue to run. The ECM will substitute a default value using the information from the speed/load map to run the engine, but adaptive fuelling will be disabled.

This condition would not be immediately apparent to the driver, but the ECM will store fault codes which can be retrieved using TestBook.

Engine Oil Temperature Sensor

The engine oil temperature sensor is located in the oil filter housing. The oil temperature measured by the ECM is used to adjust fuelling values according to engine oil temperature.

The use of an engine oil temperature sensor allows the ECM to provide optimum engine performance and minimum emissions during the engine warm up phase. The sensor provides a signal to pin 32 of ECM connector C0914. The ECM provides an earth for the sensor on pin 6 of ECM connector C0914.

The sensor consists of an encapsulated Negative Temperature Coefficient (NTC) thermistor which is in contact with the engine oil.

If the sensor fails, the ECM will substitute a default value which is ramped up 90°C (194°F). This condition will not be apparent to the driver.

The vehicle will run but may suffer from reduced engine performance and increased emissions as adaptive fuelling is disabled. The ECM will store fault codes which can be retrieved using TestBook.