Front radar system on board? Possibly front lense covered. Clean lense, that's all you can do. If you keep on driving, cruise control might not work.
What about the active .. fault code And there is also a over wellming smell of exhaust.. got a check engine ecu 2 weeks ago but never came back on now this
Then you better see a shop. It's been a few years since I drove a Volvo and had issues with the radar system. The code it threw was SDP, IIRC. I'm sorry if I was wrong. It's difficult to get answers in the middle of the night.
