Hi, Happend to me a couple of months ago, it seems that when both rear bulbs are gone, you get the warning message and the rear high level light on (its something to do with the blown elements in the bulbs creating some kind of short back into the system, this doesnt happen all the time, but when the element in the bulbs shorts, it powers the light and the car thinks your breaking and gives the fault) the light only stays on for around 15 minutes when you stop, as it seems to be on the feed that covers accessories in the car that shuts off automatically after a period of time. swap the bulbs for nice new ones and it will go away <_<