My manual says this light indicates an issue with the OBD II, emissions related,and has been on for a couple of days now. It could be attributed to loose gas cap(it's tight), different gas(no). Is there anything else I can check before I take this into the dealer for diagnosis? I am not very familiar with this function.

 

Need to have it scanned to find out why it is on. There are so many codes that could be set it would be impossible to give you any direction