P0457-EVAP SYSTEM - LOOSE FUEL CAP
For a complete wiring diagram Refer to Section 8W.
- 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.
| Possible Causes |
| LOOSE OR MISSING FUEL FILLER CAP |
Diagnostic Test
1. DTC IS ACTIVENOTE: 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.
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.