alloy

I have an 03 sti with a full turbo back decat 3inch for 2 months, hks fcon ecu for a month and on saturday had a hks evc 5 boost controller. Car runs super, pulls hard delivering 1.33 bar giving 298 hp at the wheels and with the SCB function can clip 1.5. On Sunday i was driving and on the dash the CBD indicator lamp came on, i believe this is with regard to emissions, the car still runs fine and seems as if nothing is wrong with it. How do i get rid of the symbol off my dash and should i have any reason for concern?
Cheers