P0461 FUEL LEVEL SENSOR

Description
The fuel level sensor is mounted in the fuel level sensor unit.
The sensor detects a fuel level in the fuel tank and transmits a signal to the combination meter. The combination meter sends the fuel level sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output voltage changes depending on the movement of the fuel mechanical float.

DTC Logic

DTC DETECTION LOGIC

NOTE:

• If DTC P0461 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX. Refer to See: U Code Charts\U0101.
• If DTC P0461 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to See: P0607. Driving long distances naturally affect fuel gauge level.

This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has been driven.

1. Prepare a fuel container and a spare hose.
2. Release fuel pressure from fuel line, refer to See: Powertrain Management\Emission Control Systems\Evaporative Emissions System\Testing and Inspection\EVAP Leak Check.
3. Remove the fuel feed hose on the fuel level sensor unit.
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch OFF and wait at least 10 seconds then turn ON.
6. Select "FUEL LEVEL SE" in "DATA MONITOR" mode with CONSULT-III.
7. Check "FUEL LEVEL SE" output voltage and note it.
8. Select "FUEL PUMP RELAY" in "ACTIVE TEST" mode with CONSULT-III.
9. Touch "ON" and drain fuel approximately 30 l (7-7/8 US gal, 6-5/8 Imp gal) and stop it.
10. Check "FUEL LEVEL SE" output voltage and note it.
11. Fill fuel into the fuel tank for 30 l (7-7/8 US gal, 6-5/8 Imp gal).
12. Check "FUEL LEVEL SE" output voltage and note it.
13. Confirm whether the voltage changes more than 0.03 V during step 7 to 10 and 10 to 12. Is the Inspection result normal?

YES >> Inspection END
NO >> Go to Diagnosis Procedure.
3.PERFORM COMPONENT FUNCTION CHECK
Without CONSULT-III

NOTE:
Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30 l (7-7/8 US gal, 6-5/8
Imp gal) in advance.

1. Prepare a fuel container and a spare hose.
2. Release fuel pressure from fuel line. Refer to See: Powertrain Management\Emission Control Systems\Evaporative Emissions System\Testing and Inspection\EVAP Leak Check.
3. Remove the fuel feed hose on the fuel level sensor unit.
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch ON.
6. Drain fuel by 30 l (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.
7. Confirm that the fuel gauge indication varies.
8. Fill fuel into the fuel tank for 30 l (7-7/8 US gal, 6-5/8 Imp gal).
9. Confirm that the fuel gauge indication varies. Is the Inspection result normal?

YES >> Inspection END
NO >> Go to Diagnosis Procedure.

Diagnosis Procedure
1.CHECK COMBINATION METER FUNCTION
Refer to See: Instrument Panel, Gauges and Warning Indicators\Testing and Inspection\Scan Tool Testing and Procedures\CONSULT-III Function.
Is the Inspection result normal?
YES >> GO TO 2.
NO >> Go to See: Instrument Panel, Gauges and Warning Indicators\Testing and Inspection\Component Tests and General Diagnostics\Fuel Level Sensor Signal Circuit\Diagnosis Procedure.
2.CHECK INTERMITTENT INCIDENT
Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.
>> Inspection END