My car does that everyonce in a while. I've noticed that when i start my car i hear a click and if i don't hear the click, kinda like something is loading, then the 4WS light is on. I turn my car off then right back on, even if i'm driving at slow speeds and it goes away. My car is under warranty so I'm not worried about it. Made sure all my bases were covered when i bought the little guy.