Fuel Level Sensor

Fuel level sensor is used as an input to operate fuel gauge and for certain On-Board Diagnostic (OBD-II) emission requirements. When fuel level decreases, voltage increases to the PCM. When fuel level increases, voltage decreases to the PCM. The PCM will monitor voltage from fuel level sensor to prevent false misfire and fuel system monitor DTCs from being set. If the voltage is less than approximately 15 percent of tank capacity this monitor is turned on. If vehicle is equipped with a Leak Detection Pump (LDP), this monitor is turned on if fuel capacity is more than 85 percent of fuel tank capacity.