Ok, my ABS light has been coming on when i start driving my car at exactly the same point i get down the road from my house, so it comes on at exactly the same time after i start driving. like one minute after driving it ALWAYS comes on. just topped off the brake fluid.....but my ABS still appears to be workin fine cuz when i slam the brakes on, they wheels don't lock up. anybody know what this could be??

 

check for codes.