My 2001 Saab 9-5SE. While I was replacing my turbo, I was retrieving a part that fell into the throttle throat. After I got everything back together, the car will not start. Got 1530 and/or 1230 codes. Did the limp home reset several times and it went back into limp home each time.
Questions:

1. when sticking my grease covered fingers into the throat, could I have messed up the sensors, and is this repairable- how?

2. while moving the butterfly to retrieve the part, could I have messed up the sensors, and is this repairable- how?

3. the WIS shows volt testing the sensors and gives 'B+' as a contact point. Does this mean positive battery post? Or what.

4. If I take it out, is there any repairs I can do on it before I spend $350-$400 for the part? and 5. There is also references to software updates. How do I determine whether my car has or does not have the update and does this mean that a replacement will not work on my car?