F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
Fuel Tank Temperature Sensor (CNG): Description and Operation
NOTE: The descriptions and specifications contained were in effect at the time this information was approved for printing. Ford Motor Company
reserves the right to discontinue models at any time, or change specifications or design without notice and without incurring obligation.
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).
