Engine Fuel Temperature Sensor
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2002 Mercury Sable, 2002 Mercury Mountaineer, 2002 Mercury Grand Marquis, 2002 Mercury Cougar, and 2002 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
Engine Fuel Temperature (EFT) sensor inputs fuel temperature of fuel near fuel injectors to the PCM. EFT sensor is a thermistor device which changes resistance proportionate to temperature changes. Resistance increases as fuel temperature decreases and decreases as fuel temperature increases. Signal is used by PCM to adjust fuel injector pulse width and meter fuel to each cylinder.