engine light on all the time on 2005 Hyundai Sonata

engine light stay on all the time

2 answers
Some helpful information about the Check Engine Light, what it means and what to do in this article; http://repairpal.com/check-engine-light
Even thou the car runs great there is a problem it might be your co2 censor is bad have it checked. That was the issue with my 2003 sonata, once I replaced the co2 censor the check engine light came off after I drove it for about 50 miles...

hope that help you