check engine light on on 2007 Kia Rio

my check engine light just came on. car is running fine.what could be the problem

Asked by for the 2007 Kia Rio
Really need to check for codes, there are hundreds of reasons why the check engine light is on. Below is an article about what this light means:
1 more answer
My check engine light just came on. It is a 2007 with 110,000 miles on it. All maintenance has been done all along. We just has the rear breaks replaced (new pads )and new tire on the front right side. Any ideas on the problem, the car seems to be running fine.