[F36 435i M]

Hi guys,

Just recently had a sports cat installed and when I picked up the car a few days ago there was no CEL and was completely fine. About 50 miles later a CEL has appeared today, the car is a N55 435i 2015. Do I need to get this coded out right away or can I leave this for a while? Been told it’s possible for the car to go into limp mode ? Not sure how true this is. Any advice would be great, thanks again!