saab saying its in reverse when the shifter is in drive
 

I got a 2000 saab 95 and had to put a turbo in it ran great for about a week or so. the other day the wife takes it to go to work bakes out of the driveway and shifted to drive but the car dash went back to reverse and the car wouldn't go anywhere. I have come to the conclusion that it's a neutral safety switch but am unsure. Can anyone help please and thanks