P0462

Test 1:

Tests 2 - 5:

Tests 6 - 8:

Tests 9 - 14:

Test 15:

SYMPTOM
P0462 - FUEL LEVEL SENDING UNIT VOLTS TOO LOW

WHEN MONITORED
Ignition ON and battery voltage above 10.4 volts.

SET CONDITION
The fuel level sensor signal voltage goes below 0.2 volts at the PCM for more than 5 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
- Fuel level sensor
- Fuel level sensor signal circuit shorted to ground
- Powertrain Control Module
- Fuel level sensor signal circuit shorted to sensor ground circuit
- Fuel pump module inline harness