warning light? on 2007 Hyundai Sonata

A light came on my dash that looks like a horseshoe with an exclamation mark inside. I couldn't find it in my owners manual. What could it mean?

Asked by for the 2007 Hyundai Sonata
It is in your manual. Look harder. All fails contact the dealer, It's still under warranty. Of course that is if you are under 36K miles.
Why are you being so cryptic? If you know the answer, why not give the answer. You sound like a teacher saying, "Look it up!" -same boat