What the above poster said, it could also be caused by failed wheel speed sensors. In that case you will also see the ABS light come on. Have the car scanned with the actual Saab diagnostic tool, which is a GM Tech 2 loaded with Saab software. Most other scan tools simply will not go far with these Saabs. Good luck!
I get the same problem, but only abrupt slow sharp right turns from a stand still. I have read numerous forums and found out that it could the wheel speed sensor. I have not replaced mine yet. http://www.rockauto.com/catalog/moreinfo.php?pk=4287156&cc=1417979&jnid=413&jpid=4