is it doing it all the time or was it a one off?, havent had this happen to mine yet as full colsure option on the vag-com not open yet! (will be along with hijack mode and more when i get my usb-vagcom leads and software), if you know any one with a laptop and lead getem to hook up and monitor whats going on, all parameters can then be adjusted etc, but i dont know why its suddenly done it on its own, vw will prob have a look but charge you the eart,(uless under warrentee)