Toyota Corolla Check engine Light?

It doesn't reset itself.

You seem to totally misunderstand what a check engine light is.

It is your engine calling 911 to you. There is something that immediately needs to be addressed. Sure, it might be the gas cap. It also might be a set of bad sensors, that are destroying your engine. Could be that your fuel sender is bad, which would tie in with it going away when you fill up. This is a problem, because if your fuel system shuts off, so does the car. While you're driving.

Currently, you're ignoring the 911 call. Good job. Way to be a responsible car owner.

Take it in, have the code read, and find out what is actually wrong with it.

The check engine light is your car telling you that there is something wrong with your car.

If you are no longer under warranty, then I'd suggest going to a local Autozone or similar auto parts store to have the OBD-II error codes read. (Such stores will read the codes for free, in the hope that perhaps you'll use them to buy the parts to fix the problem.) Once you know what the problem is, you can fix it. The error code could be for something simple like your gas cap wasn't seated properly, or it could be a warning that your engine or transmission is about to die if you keep driving on it... If something simple, you can also have the stored codes deleted (thereby turning off the check engine light). Drive around a bit with the light off, and if the problem comes back, it'll relight the check engine light, if not, you're ok.

Driving around is not what resets the check engine light... Some cars, if a transient and not major problem, after 3-4 restarts and the problem doesn't reoccur the light will go out on its own.

Note that if you have the codes deleted, or you decide to disconnect the 12v battery for a few minutes to clear the codes, that the car's computer(s) will note that the computers are not ready. You usually need to drive around for another 200 miles or so before the car will be ready again. This is important to know if you are just trying to get rid of the light for a state safety/emissions test.

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RE:

Toyota Corolla Check engine Light?

Check engine light comes on, In past the gas cap has been culprit. Antifreeze is ok, come on stays on when filling up with gas full tank goes off. How long do you have to drive around before it resets itself??

lol putting electrical tape is only something that homer simpson should do...like in that episode of the simpsons where their car breaks down, then they end up at some old west sightseeing thing...anyways

what the answer above me says, ignoring it is just being irresponsible. it says "check engine" how much simpler can it get?

you have to bring it to a mechanic to diagnose the problem

You probably have to take it to a mechanic and have it reset, or use my method: Put electrical tape over it. It's usually a scam to make you take it to the dealer and pay a bunch of money!!