P0461

P0461-FUEL LEVEL UNIT NO CHANGE OVER TIME





For complete wiring diagrams refer to Diagrams/Electrical.


- When Monitored:

While the engine is running.

- Set Condition:

Fuel level does not change by a calibrated amount over a calibrated amount of time.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test


1. EXTERNAL DAMAGE TO FUEL TANK

Visually inspect the fuel tank for external damage.

Is the fuel tank damaged from the outside?

Yes

- Fix or replace the fuel tank.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 2

2. FUEL LEVEL SENSOR

Disconnect the wiring harness from the fuel level sensor.


NOTE: Check connectors - Clean/repair as necessary.

Remove the fuel level sensor from the fuel tank.

Does the fuel level float move freely?

Yes

- Go To 3

No

- Replace the fuel level sensor.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

3. FUEL LEVEL SENSOR

Measure the resistance between the sensor (N4) signal circuit and (K900) return circuit while moving the sensor float arm.

Does the resistance level change as you move the sensor arm?

Yes

- Go To 4

No

- Replace the fuel level sensor.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

4. INSIDE OF FUEL TANK OBSTRUCTED DAMAGED

Visually inspect the inside of the fuel tank for obstructions.

Is the inside of the fuel tank damaged or obstructing the fuel level sensor?

Yes

- Test Complete.

No

- Replace the fuel tank.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test