Engine light on!! Why!

[justin23788]

2009 Buell xb12scg
I changed the spark plugs now the yellow start up light stays on

[user_deleted]

if you changed your plugs the conventional way i am assuming you removed both your factory left side air intake scoop as well as your entire airbox assembly. if that was the case then check the following for unplugged connections/sensor:
1-check that both wiring harness plugs behind the air scoop were properly plugged back together.
2-check that your IAT sensor that is mounted at the 4 o'clock position on the bottom of the airbox base plate is reconnected to its plug.
if any of those components are left unplugged it will automatically trigger the CEL to illuminate.