All of a sudden my music system (radio, ipod.

All of a sudden my music system (radio, ipod connection, etc.) Isn't working in my 2012 Honda Fit. I turned off the system and turned it back on but there says theres a "code error" or something and when I click the "AUX" button to play my ipod that's plugged in nothing happens. And essentially none of the buttons related to my car's music system are working whatsoever.
Any advice as to how I can fix this?
thanks!