gas light

Take it back to the dealer since its new and under warranty and let them fix it. Thats what you are paying for is the warranty make shure they fix it right.

Your Problem there is that the gas tank sending unit is not working, it's located inside the gas tank, there is probably a access hole under the rear seat, it's a one unit piece probably, and should be replaced by a Mechanic that has experience, but you can do it your self if you really try!

Same here my 2002 sonata is doing that I put gas in and it went to E gas light came on and stayed there can anyone tell me why or what the problem may be