Faulty fuel level sensor
Fuel level sensor harness is open or shorted
Fuel level sensor circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Incorrect fuel level reading
The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the Engine Control Module (ECM). The fuel level sensor consists of two parts, one is mechanical float and the other side is variable resistor. The fuel level sensor output voltage changes depending on the movement of the fuel mechanical float.