DTC B2046: Main Up/Down Switches Active At The Same Time: Condition
WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.
The switch suddenly moves to an abnormal position during operation of the soft top.
The problem may also be caused by the microswitch for fifth bow down not having correct status