If you are driving the vehicle frequently, especially in the summer days that can raise the temperature of the engine which can lead to engine overheating problems in your Volvo XC90. Driving the car in this condition is suddenly producing black smoke under the hood that can cause further engine damage. Go through the video to know about the common reasons behind your Volvo XC9 overheating all of a sudden.
https://www.youtube.com/watch?v=hAzVxf1QUQY