i have a similar problem. my abs light will either stay on or turn off when i first start the car. i dont have to drive it.. its completely random. sometimes it'll stay on (and when it stays on the abs doesnt work, of course) or it'll turn off like its supposed to after a few seconds. the previous owner knew about it and told me about it, but i havent gotten it checked out at my dealer yet. if you find anything out, let me know.