Engine Light - Kia Carnival

I have 2006 Kia Carnival which was specifically decorated for Australian Open. Since the beginning of this year I have been encountering problems with my engine light - continuously being lit. The vehicle has been maintained by the dealer where I purchased from and yet they can't fix the problem.

So far there hasn't been any issue but it defeats the purpose. Does any of you owners have come across the problem?

Best Regards
Ben Edwards