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Loose or Missing Fuel Cap Warning
InformationalWhat it generally indicates
Indicates the evaporative emissions system has detected a pressure loss, most often from a loose, damaged, or missing fuel cap.
Possible causes
A fuel cap that wasn't tightened after refueling, a damaged cap seal, or a missing cap.
Whether continued driving may be risky
No immediate drivability risk, but it can also trigger the check engine light if left unresolved, and allows fuel vapors to escape.
What a technician may inspect
Make sure the fuel cap is on and tightened until it clicks; if the light doesn't clear after a few drive cycles, the cap or seal may need replacing.
Related vehicle systems
Fuel
Related repairs
This is general guidance, not a diagnosis — your owner's manual is the final word for your specific model, and a qualified technician should confirm the actual cause.