Honda: 2004 civic coupe ex, honda dealership, civic ex coupe

Question
at 18,000 miles my check engine light went on, i was suppose to change the oil every 3000 miles so at 20,000 miles i decided to change it, i figured if i changed it the light will go away like last time. But i thought wrong ,the light stayed on after i changed the oil and the oil filter, i even gave it a full synthetic oil! Can you please help me? I need to know whats wrong with my civic ex coupe 2004. Please respond as soon as possible.

Answer
"Check Engine" means there is an emissions problem.  It could be anything.  The Honda Dealership will diagnose and fix this problem free of charge, unless you have a supercharger or something like that.  You should still be under warranty.

Hope I helped,
Barrett.