DTC P0461 Fuel Level Sensor "A" Circuit Range/Performance: General Description

In order to measure the Fuel Level within the tank, the Fuel Level Sender consists of a variable resistor card mounted in the Fuel Pump and Sender unit (located in the fuel tank). A float located in the fuel tank swivels up and down as fuel level varies. A wiper is attached to the float and sweeps across the resistor card, thus providing a variable resistive input to the PCM. As the float sweeps across the Fuel Level Sender resistor card, the input voltage to the PCM varies accordingly. The PCM has calibrations and software which convert this analog voltage to a Fuel Level reading.