I made it to Checkers to pull codes since my CEL came on and the reader he used, Autoxray, didn't have Volvo listed. What the ****? He put in that the car was a VW just to get a code and it came back knock sensor. I don't think I should go by this and he didn't really either, but what are the chances it was right? It was a generic P0 code. I am no mechanic, but the way the engine isn't quite right now, I wouldn't think it's a knock sensor.

 

Find an Auto Zone or Discount Auto parts and have them pull the codes so you know for sure.