Fuel Level Sensor

The fuel level sensor consists of a float, a wire float arm, and a ceramic resistor card. The position of the float arm indicates the fuel level. The fuel level sensor contains a variable resistor which changes resistance in correspondence with the position of the float arm. The ECM sends the fuel level percentage via High Speed CAN-Bus to the body control module (BCM). The BCM then sends the fuel level percentage via Low Speed CAN-Bus to the instrument cluster in order to control the fuel gauge. This information is used for the instrument panel cluster fuel gauge and the low fuel warning indicator, if applicable. On all wheel drive models, the control module monitors the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to determine the fuel level. The control module also monitors the fuel level input for various diagnostics.