Not that I know of. I smoke a pipe, which can produce a lot more smoke. And, I am in a 2013 Volvo. If they had new sensors, it would be on my truck.
The only 'sensor' they would have would be a shop mechanic with a sensitive nose, I would think. But an electronic sensor? Doubtful. And, why??? If they fired all the smoking drivers they would be out of business.
I dont know? Was just passing on what I heard and like you it does sound fishy but this driver has been there for 12 years and seems to know a lot. I was surprised.
They never installed the controls to the Webasto heater in my 2013 Volvo. I've been hearing that other drivers contacted their DMs about this same issue.
I know their volvo's have a temp control system. Their pro stars don't. Just idle. Hold the brakes when the light comes on. They'll ##### about the idle though. Buy a fan. They don't use apu's.