How often is the xc60 throttle cleaned?

Xc60 throttle is cleaned every 40,000 kilometers. The xc60 is a medium-sized SUV with the length, width and height of 4688mm, 1.902mm and 1.658mm respectively. The wheelbase is 2865mm, the engine is 2.0TL4, the body type is 5-door 5-seat SUV, the gearbox is 8-speed manual, and the air intake form is turbocharged. Throttle is a controllable valve that controls air to enter the engine. There are two kinds: traditional cable throttle and electronic throttle. After the gas enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, which will be burned to do work. It is connected to the air cleaner at the top and to the engine block at the bottom.