P0461

DTC P0461: Fuel Level Sensor Performance

Wiring Diagram:

Circuit Description
The Engine Control Module (ECM) uses the signal from the fuel level sensor to calculate expected vapor pressure within the fuel system. Vapor pressure varies as the fuel level changes. The fuel level signal also used to determine if the fuel level is too high or too low to be able to detect Evaporative emission (EVAP) system faults. This Diagnostic Trouble Code (DTC) indicates the fuel level stuck.

Conditions for Setting the DTC
- Change in fuel level sensor output is less than 3.5% after 250 km (155 mile) driving.
- Engine is running.
- No fuel level fault present.

Action Taken When the DTC Sets
- The Malfunction Indicator Lamp (MIL) will illuminate.
- The ECM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records buffers.
- A history DTC is stored.

Conditions for Clearing the MIL/DTC
- The MIL will turn OFF after four consecutive validation cycles in which the diagnostic runs without a fault.
- A history DTC will clear after 40 consecutive warm up cycles without a fault.
- The DTC(s) can be cleared by using the scan tool.
- Disconnecting the ECM battery feed for more than 10 seconds.

Diagnostic Aids
An intermittent may be caused by a poor connection, rubbed-through wire insulation or a wire broken inside the rubber.
Check for a poor connection or damaged ECM harness.Inspect the fuel level circuit terminal for the following conditions:
- Improper mating
- Broken locks
- Improperly formed
- Damaged terminals
- Poor terminal-to-wire connection
- Damaged harness

Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
1. The On-Board Diagnostic (OBD II) System Check prompts the technician to complete some basic checks and store the Freeze Frame and Failure Records data on the scan tool if applicable. This creates an electronic copy of the data taken when the malfunction occurred.
The information is then stored on scan tool for later reference.
2. Determine if fault is present. Review Freeze Frame data to determine when the DTC set. Always record this information.

Step 1-7:

Step 8-11:

Troubleshooting