P0462

Schematic:

CIRCUIT DESCRIPTION
The Fuel Level Sensor changes resistance based on fuel level. The Fuel Level Sensor has a signal circuit and a ground circuit. The PCM applies a voltage (about 5.0 volts) on the signal circuit to the sensor. The PCM monitors changes in this voltage caused by changes in the resistance of the sensor to determine fuel level.

When the fuel tank is full, the sensor resistance is high, therefore the PCM will sense a high signal voltage (fuel tank full). When the fuel tank is empty, the sensor resistance is low, and the PCM senses a low signal voltage (fuel tank empty).

The PCM uses inputs from the Fuel Level Sensor to calculate the total fuel remaining in the fuel tank. This information is then sent to the fuel gauge via the class 2 circuit. The Fuel Level information is also used for misfire and EVAP diagnostics.

This DTC sets when the PCM senses a signal voltage lower than the normal operating range of the sensor.

CONDITIONS FOR RUNNING THE DTC
^ The ignition is ON.
^ The system voltage is between 11 and 16 volts.

CONDITIONS FOR SETTING THE DTC
Fuel level sensor reading is less than 3.5 percent for more than 25 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM will record the operating conditions during the time which the diagnostic fails. This information will store in the Failure Records.
^ A history DTC is stored.

CONDITIONS FOR CLEARING THE DTC
^ A history DTC clears after 40 consecutive warm up cycles without a fault.
^ The scan tool clears the DTC.

Diagnostic Chart:

TEST DESCRIPTION
The numbers below refer to the step numbers on the Diagnostic Table.
2. This step determines if the fault is present.