I had the same code after putting my car back together. Check that number 1 on the diagram has every thing plugged in correctly, this was what was causing my problem. It is on the pasinger side abuse the belt.
http://www.realoem.com/bmw/enUS/showparts?id=RE33-USA-05-2003-R53-Mini-Cooper_S&diagId=13_0977
ostcount