I'm sure this has been asked before, but I recently changed the oil on my audi (A4, 99.5) but about 1800 miles later the service oil light is coming on when I start the car and it never did before since I owned it (I've changed the oil twice and I've owned it for a few months). The amount of oil is fine, so could anyone maybe repost a link or fill me in on how to reset the sensor. Thanks soo much guys!