There are many reasons for a CE light. If it went off, don't worry about it. You may have had a loose fuel or oil cap, or you're developing some sort of problem with emissions (oxygen sensors or the MAF) that has yet to become a consistent problem.
When and if it comes back on and stays on, go to an autozone and have them use their code reader and then search here (the forum) to diagnose what it is.
[EDIT: Sorry! I didn't see you were posting from overseas. You may have to buy a code reader or go to the dealership. Sorry!]
Now if the CE light BLINKS, turn off the motor and coast to the side of the road. That's bad news. However, it doesn't sound like this is what happened to you.
