Fuel Level Sensors

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There are 2 fuel level sensors are used to measure the amount of fuel remaining in the left and right sides of the fuel tank. The left passive fuel level sensor 'B' is attached to the tank internal bracket. The right active fuel level sensor 'A' is attached to the outside of the fuel pump swirl pot. Both sensors are connected to the Body Control Module/Gateway Module (BCM/GWM) hardwired via the external electrical connector.

Both level sensors are Magnetic Passive Position Sensors (MAPPS) which provide a variable resistance to ground for the output from the fuel gauge.

The fuel level sensor signals are converted into FlexRay messages by the BCM/GWM. The signals are used by the Instrument Cluster (IC) for fuel gauge and fuel warning indicator operation. The signals are also monitored by the Powertrain Control Module (PCM) to store On-Board Diagnostics (OBD) codes for misfire detection when the fuel level is below a predetermined capacity.