read your manual... the light comes on at certain mileage points reminded you to do scheduled maintenence on your vehicle. 2 minutes of reading and you should be able to turn it off yourself. Generally people take it to the dealer for this maintenence but it should also tell you all the services that are performed at this mileage point. If this is not the case you obviously have a sensor that has is triggering this light and you'll need to take it in for service or go to autozone have them pull the code its throwing at you and fix whatever problem it might be.