Hi Mike99, The warning light comes on at random, sometines goes for 300 miles without coming on, other times comes on and stays on for 40 mile joourney, other time comes on mid-journey and goes off again without stopping the car. There is no pattern to it, for example, today I travelled 80 miles, no light on. If it comes on, it normally stays on for the duration of the journey. I am lost for why it is coming on.