Traction control light on

Hi all. I have a 2013 Pro 4-X that I've taken through some pretty hairy adventures. A little while back the traction control light came on (solid). I've tried clearing it, etc. but it always comes back.

Anyone have this issue? What was the culprit? I'm pretty handy and have plenty of tools so I'm definitely not scared to replace some stuff if needed.

Thanks!!