2005 Sonata Numeric Warning Light

Hello everyone. I am a newbie. My name is Mark. I have a question I hope someone can answer for me. My wife was involved in a minor fender bender. She was hit in the rear end. Now we have a number 4 warning next to the gear indicator on the dash. Does anyone know what this mean? I cannot find anything on this type of warning. Any help would be greatly appreciated.
Thanks,
Mark