DTC B2021: #5 Bow Intermediate Switch - Function Incorrect: 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 microswitch for the main cylinder may also be the cause of the diagnostic trouble code.