NGC

P0457-LOOSE FUEL CAP

For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
After the PCM detects a significant fuel level change.

- Set Condition:
If the PCM detects a large leak in the Evaporative System for two consecutive cold start trips after a significant fuel level change, this DTC will set. One good trip turns off the MIL.





Diagnostic Test

1. DTC IS ACTIVE

NOTE: If DTC P0455-EVAP SYSTEM LARGE LEAK is set along with this DTC, perform the diagnostic procedure for P0455 before continuing with this test.

NOTE: Do not replace the gas cap for DTC P0457-EVAP SYSTEM - LOOSE FUEL CAP.

With a scan tool, select View DTCs.
Is the status Active for DTC P0455-EVAP SYSTEM LARGE LEAK along with this DTC?

Yes

- Perform the diagnostic procedure for P0455-EVAP SYSTEM LARGE LEAK. P0455

No

- No repair is necessary. Verify that the gas cap is in place and tight. Clear DTCs and follow the directions outlined under Instrument Cluster on resetting the odometer or message center display.