P0463

Test 1:

Tests 2 - 5:

Tests 6 - 8:

Tests 9 - 13:

Tests 14 - 15:

SYMPTOM
P0463 - FUEL LEVEL SENDING UNIT VOLTS TOO HIGH

WHEN MONITORED
Ignition ON and battery voltage above 10.4 volts.

SET CONDITION
The fuel level sensor signal voltage at the PCM goes above 9.9 volts for more than 90 seconds.

APPLICABILITY START AT TEST
- without 5.2L V8 CNG 1
- 5.2L V8 CNG 9

POSSIBLE CAUSES
- Fused ignition switch output circuit open
- Fuel level sensor wiring harness intermittent problem
- Fuel pump module wiring harness intermittent problem
- Sensor ground circuit open
- Fuel level sensor
- Fuel level sensor signal circuit open
- Powertrain Control Module
- Fuel pump module inline harness