Diagnostic Test
- CHECK FOR FUEL LEVEL SENSOR CIRCUIT DTCS SET IN THE BCM NOTE:
Diagnose and repair any CAN BUS, communication or implausible signal DTCs before proceeding with this test.
NOTE:If DTCs P2067 or P2068 are also active, 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 DIAGNOSTIC CODE INDEX .
No
- Go To 2
- VISUALLY INSPECT FUEL TANK
- Visually inspect the Fuel Tank for damage that may restrict the Fuel Sending Unit float from moving.
Is the Fuel Tank OK?
Yes
- Go To 3
No
- Replace the Fuel Tank in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- Visually inspect the Fuel Tank for damage that may restrict the Fuel Sending Unit float from moving.
- 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.
- Remove the Fuel Tank in accordance with the Service Information. Refer to TANK, FUEL, REMOVAL .
- Remove the Secondary Fuel Pump Module.
- Visually inspect the inside of the Fuel Tank for any obstructions or deformities.
- Inspect the Secondary Fuel Level Sensor Float arm for damage.
Were any problems found?
Yes
- Repair or replace as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Replace the Secondary Fuel Level Sensor.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .