have keyless start, but do not have remote start...when I start the car to let it warm, for a couple of minutes...I take the fob with me, but when I shut the door, the horn blows, alerting the neighborhood that I am warming the car. I woulk like to lock it while I go in for a couple of minutes to get my things. (I have visual on it, so not much worry about theft.) Any settings I can change to stop that?