Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

FUEL LEVEL SENSOR CIRCUIT DTCS SET IN THE BCM
NOTE:
If the P0462 or P0463 are also set, diagnose and repair those DTCs before continuing with this test procedure.

Are any Fuel Level Sensor Circuit DTCs set in the BCM?

Yes
- Diagnose the appropriate Fuel Level Sensor Circuit DTC in the BCM. Refer to DTC INDEX .
No
- Go To 2
VISUALLY INSPECT FUEL TANK
1. Visually inspect the Fuel Tank for damage that may restrict the Fuel Sending Unit float from moving.
  Is the Fuel Tank damaged?
  
  Yes
  - Replace the Fuel Tank in accordance with the service information. Refer to TANK, FUEL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
INTERNAL INSPECTION OF THE FUEL TANK
WARNING:
The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in possible serious or fatal injury.
1. Remove the Fuel Tank in accordance with the Service Information. Refer to TANK, FUEL, REMOVAL .
2. Remove the Fuel Pump Module. Refer to MODULE, FUEL PUMP, REMOVAL .
3. Visually inspect the inside of the Fuel Tank for any obstructions or deformities.
4. Inspect the Fuel Pump Module Float arm for damage that may restrict movement.
  Were any problems found?
  
  Yes
  - Repair or replace as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
POWERTRAIN CONTROL MODULE (PCM)
1. Perform any Service Bulletins or flash updates that may apply.
  Were there any Service Bulletins or flash updates?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .