I turned on the ignition and after I reached 7 mph the light came on. This has happened twice after my car has been sitting on the driveway longer than 24 hrs. and after heavy rain fall. The way I found out to make it come off is going down the road and SLAM on the brakes. But when I come to a stop and then go again the light come back on eventually the light goes off and stays off. It runs like there is nothing wrong just the light is on. Has anybody else had this happened or know why?