General Information

Engine Control
P0463 Fuel Level Sensor - General Information

Component Location





General Description

ECM monitors the voltage output signals of the Fuel Level Sensor (FLS) (#1) and the Fuel Sub Sender (#2). The combined resistance of the two sensors in series enables the fuel gage to determine fuel tank level. ECM also uses values from both sensors to determine condition of the EVAP system for leak detection. ECM monitors both fuel level sensors for the conditions of being stuck high or low, and differences between voltages of fuel level sensors. ECM will calculate if voltage deviation of fuel level sensors has exceeded a limit value while driving. This would be interpreted by the ECM as a fault.

DTC Description

ECM monitors the output signal of fuel sub sender #2, if the fuel level voltage is higher than 9.8V, the ECM sets a P0463 DTC. The Malfunction Indicator Lamp (MIL) turns on when the malfunction lasts 2 consecutive driving cycles.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram










Signal Waveform & Data








Fig.1) Normal data of Fuel Level at idle (41%).
Fig.2) Abnormal data of Fuel Level when fuel level sensor circuit open or short.