There may be an issue with the system, the only way to know for sure is to run a short test and this will require access to the proprietary BMW software or go to Peake research.com and check out their code readers.
Jul 25, 2008 at 12:52 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.