How often is the xc60 throttle cleaned?

Xc60 throttle is cleaned every 40,000 kilometers. Xc60 is a medium and large SUV, with the length, width and height of 4688mm, 1.902mm and 1.658mm respectively, the wheelbase is 2865mm, the engine is a 2.0TL4, 5-door and 5-seat SUV body type, an 8-speed automatic manual transmission and turbocharged air intake. Throttle is a controllable valve that controls air to enter the engine. There are two kinds of throttle: 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 with the air filter and the engine block.