P0463

DTC P0463: Fuel Level Sensor Circuit High Input

Fuel Gauge Unit Circuit:

CIRCUIT OPERATION
- The fuel level sensor output voltage is input in ECM (terminal No. 74) or PCM (terminal No. 60) .

TECHNICAL DESCRIPTION
- Branch the output voltage from the fuel level sensor circuit and input it into ECM or PCM.
- The ECM or PCM checks whether this voltage is within a specified range.

DESCRIPTIONS OF MONITOR METHODS
- An open circuit is detected while monitoring the fuel level sensor output.

MONITOR EXECUTION
- Continuous

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
- Not applicable

Sensor (The sensor below is determined to be normal)
- Not applicable

DTC SET CONDITIONS

Logic Flow Chart:

Logic Flow Chart

Check Conditions
- Battery positive voltage is between 11 and 16.5 volts.
- 2 seconds or more have passed since the engine staring sequence was completed.

Judgement Criterion
- Fuel level sensor output voltage has continued to be higher than 4.2 volt for 2 seconds.

OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Procedure 6 - Other Monitor. OBD-II Drive Cycle Pattern Lists

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Fuel level sensor failed.
- Open or shorted fuel level sensor circuit, or connector damage.
- ECM failed.
- PCM failed.

DIAGNOSIS

STEP 1. Check fuel gauge.

Q: Is the fuel gauge functioning?

YES: Go to Step 2.

NO: Refer to Chassis Electrical-Combination Meters Assembly and Vehicle Speed Sensor-Equipment Diagnosis-Symptom Chart.

STEP 2. Check the trouble symptoms.

1. Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Procedure 6 - Other Monitor. OBD-II Drive Cycle Pattern Lists
2. Check the diagnostic trouble code (DTC).

Q: Is DTC P0463 set?

YES: Replace the ECM or PCM. Then go to Step 3.

NO: It can be assumed that this malfunction is intermittent. Refer to How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions.

STEP 3. Test the OBD-II drive cycle.

1. Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Procedure 6 - Other Monitor. OBD-II Drive Cycle Pattern Lists
2. Check the diagnostic trouble code (DTC).

Q: Is DTC P0463 set?

YES: Retry the troubleshooting.

NO: The inspection is complete.