Spark

DTC P0461-P0463

The fuel level sensor changes resistance in response to the fuel level. The engine control module (ECM) monitors the signal circuit of the fuel level sensor in order to determine the fuel level. When the fuel tank is full, the sensor resistance is low and the ECM senses a low signal voltage. When the fuel tank is empty, the sensor resistance is high and the ECM senses a high signal voltage. The ECM uses the signal circuit of the fuel level sensor in order to calculate the percentage of remaining fuel in the tank. The ECM sends the fuel level information to the instrument panel cluster (IPC) in order to display the fuel level.

P0462 or P0463 (Without FX3)

P0461, P0462, or P0463 (FX3)

P0461 (FX3)

The ECM detects that the change in fuel level sensor signal is less than 0.015%.

P0462 (Without FX3)

The ECM detects that the fuel level sensor signal voltage is less than 0.2004V.

P0462 (FX3)

The ECM detects that the fuel level sensor output is less than 0.05%.

P0463 (Without FX3)

The ECM detects that the fuel level sensor signal voltage is greater than 4.8485V.

P0463 (FX3)

The ECM detects that the in fuel level sensor output is greater than 0.85%.

DTC P0462 and P0463 are Type E DTCs.

DTC P0462 and P0463 are Type E DTCs.

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Instrument Cluster Description and Operation

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, verify that the scan tool ECM - Fuel Level Sensor parameter is between 0.5-2.5V and varies with fuel level.

1. Ignition OFF, disconnect the harness connector at the B46 Fuel Level Sensor.
2. Ignition OFF, test for less than 1 Ω between the low reference circuit terminal 3 and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.

3. Ignition ON, verify the scan tool Fuel Level Sensor parameter is greater than 0.2V.

⇒	If less than the specified range, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K20 ECM.

4. Install a 3A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 3. Verify the scan tool Fuel Level Sensor parameter is less than 4.85V.

⇒	If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.

5. If all circuits test normal, test or replace the B46 fuel level sensor.

1. Ignition OFF, remove the G12 fuel pump and verify there are no obstructions interfering with the fuel level sender.

⇒	If any interference is present, repair the fuel sender interference.

2. Ignition OFF, disconnect the harness connector at the B46 Fuel Level Sensor.
3. Sweep the sensor through the entire range while testing for 30-270 Ω between the signal terminal 4 and the low reference circuit terminal 3.

⇒	If not within the specified range or is erratic, replace the B46 fuel level sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.