First off, fix the problem that set the code. Some codes will clear themselves when you fix the problem. Second off, document all the freeze frame data of when the code was set. Some codes are not as simple as they first seem, and this data can become valuable in the event future problems occur, or if the problem comes back. The best way to clear the code is with a code reader. Many auto parts stores can do it for you. Myself, I would get my own OBD-II reader and do it myself. Having the reader will come in handy. You can do it by disconnecting the battery, but that clears the memory of other things too.