I have exactly the same problem. Last time it started, it turned out there was a problem with the radiator which was replaced. Car has been fine for over a year, now the STOP light comes on on dash, and a beeping sound, but only when I turn a corner and it stays on, at most, for a second or two. Fluids and all the usual things have been checked, so I too would like to know if anyone can shed any light on this.
Mike, March 2007