Could be one of the damper motors. Had the same problem with one on my '99 S70 last year. I got a replacement from the local junk yard. https://www.matthewsvolvosite.com/forums/viewtopic.php?f=1&t=60451 https://www.youtube.com/watch?reload=9&v=MhBzo9TUaBI Do you have access to a VIDA/DICE? T...

https://www.matthewsvolvosite.com/donate

(thanks, btw!)

You don’t say how many miles on the car and what type of driving it normally gets. Was the check engine light on prior to the plug service and were there any codes then? -Joe (Btw I’m skeptical of the needed service too, for no other reason than i have original exhaust and cat on my 99 S70 and can’t...

Not done it myself but replacing the camera itself should be plug and play. But before you get that far, I recommend some more troubleshooting. Maybe just a loose connection, or maybe the camera is not secured ? https://accessories.volvocars.com/InstallationInstruction/Document/VCC-394789-1/en-us/XC...