You can go to the dealership and pay $100+ for them to extinguish the light (once) or for $100 more you can purchase this very helpful hardware/software kit,
http://www.durametric.com/ as long as you have a laptop. You'll be able to take care of the light (over and over again) and also be able to tap into all the parameters of yours cars systems and see temps, pressures, rpm, etc.