If your check engine light come on what does that indicate?

There are numerous possibilities. There first thing I would do is remove the gas cap and then reinstall it. Tighten it until it clicks a few times. Restart your car. It may take a few restarts in between driving out around. If the light does not go out, have a mechanic inspect it.

Could be a wide range of things, you need to take it to a mechanic and have it checked. It could be something simple, or it could be something major. Best to err on the side of caution and have it checked, dont ignore it.