hi guys
had my xf coupe about 6 weeks now great car, thought i would improve its performents a little so about a week ago fitted new k&n air filters and yesterday had its ecu remapped great improvment much more power, the garage that did the work also hard wired my road angel speed detector, they did a real nice job.
how ever today after driving for most of the day no probs, then the bas/esp warning light came on, turned off the engine and restarted seems to have cleared the problem, any one have any ideas what could be up??

cheers guys