GPEC

P0457-EVAP SYSTEM - 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 a leak greater than.090" is detected by the PCM 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 reset the odometer or message center display.