Outside air temperature indicator acting up again following the first repair. Went to the dealer yesterday for another look at the outside temperature indicator. Found out the outside air temperature feeds several functions on the car including the Climate Control System and the Auto STOP/START system. I also found in the owner's manual a couple of topics on the outside air temperature signal feeding into the car computer systems. The dealer noted the recall on the panoramic glass electrical switch and performed the update. The service rep stated the recall upgrade does more than just addressing some issue with the roof window switch. During the upgrade, a unit called a "VCU" had an issue and that had to be fixed/addressed. When I got my car back, several things had changed. My air conditioner controls now display, just above the fan speed, something like "CLIMATE CLEAN" that never was there before, the engine/transmission seems to run better, more pep.
And yes, the temperature sensor was deemed to be "abnormal" and was ordered. Dealer rep says it will be a few weeks because Volvo apparently has a lot of temperature sensors going bad.
These XC90s are a very complex car and systems are tied together by ways the dealer techs don't begin to understand. I'm going to be looking for some long term electrical warranty to help protect my pocketbook when the factory warranty ends. Good Luck to all of you.