Fuel Level Sensor

COMPONENTS
The fuel level sensor (fuel gage sending unit) consists of a float, float arm and a variable resistor.

OPERATION
Fuel level is measured by the position of the float in the fuel tank, and is indicated by a gage in the instrument panel cluster assembly. When the fuel level changes, the float position changes. The change in float position increases or decreases the resistance of the variable resistor which changes the position of the fuel gage needle.

Fuel Level Sensor With Enhanced EVAP
This signal is sent from the fuel level sensor in the fuel tank. This fuel level sensor is the same as that of other vehicles. The fuel level sensor sends a signal to the PCM. If the fuel level is higher than the specified level, the PCM makes the EVAP Tank Pressure Control Solenoid Vacuum valve operate so as to prevent fuel liquid from flowing from the fuel tank to the EVAP canister. Thus the Tank Pressure Control valve shuts the vapor line off.