Engine light staying on. How do I reset this?

Usually a CEL is reset by connecting to the OBDII and resetting the code. If you have determined that there is really nothing wrong with the vehicle, have the counter-person at Autozone reset the code for you. However, if there is something wrong, and when a light is on it usually means there is, you should figure out what code is being thrown and then have your vehicle looked at by a qualified technician.

go to an autoparts store and have you diagnostic trouble codes read...then let us know what they are~

you may have a loose fuel cap...that is all~ something silly and annoying like this~