Fuel Tank Temperature Sensor (CNG): Description and Operation

Fuel Tank Temperature Sensor (CNG)






The Fuel Tank Temperature (FTT) sensor is a thermistor mounted on the CNG fuel tank and is used to calculate fuel density. The compuvalve sends the FTT a five-volt reference. The FTT sensor is also used to keep the fuel gauge from fluctuating during temperature changes. A non-functioning sensor will give a constant reading of 15°C (59°F).