Welcome to the forum cpmair,
Have you thought about bad fuel? At the age of your santy you could have crud in your tank or maybe you just bought some bad fuel somewhere.

Here is a link to a page that may or may not help. It is OBD-codes .com. It might help.  http://www.obd-codes.com/trouble_codes/hyundai/

Good luck and let us know how it goes for you.

shup