DTC P0461: Fuel Level Sensor Malfunction: Description

Fuel level sensor resistance changes with fuel level in fuel tank. Powertrain Control Module (PCM) monitors signal circuit of fuel level sensor to determine fuel level. When fuel tank is full, fuel level sensor resistance is high. When fuel tank is empty, fuel level sensor resistance is low. PCM uses signal circuit of fuel level sensor to calculate total remaining fuel percent in tank. PCM sends fuel level percent through class 2 serial data circuit to Instrument Panel Cluster (IPC) to control fuel gauge. Fuel level information is also used for misfire and EVAP diagnostics.