Amber
The colour helps indicate urgency, but exact behaviour can vary by manufacturer.
Dashboard Warning Light
Fuel Cap
Fuel cap is loose or missing, or the fuel-system seal has a fault. The usual first step is: Stop safely, tighten cap; inspect if warning remains after several trips.
Inspect soon
Use this as a quick triage label before confirming in your owner manual.
Stop safely, tighten cap; inspect if warning remains after several trips
Check the matching manual page for your exact brand, model and year when possible.
What it usually means
Fuel cap is loose or missing, or the fuel-system seal has a fault.
What to do next
Stop safely, tighten cap; inspect if warning remains after several trips. If the vehicle feels unsafe, stop in a safe place and arrange professional inspection.