What is the reason for the failure of the basic setting of Passat throttle control unit?

Failure reason of Passat throttle control unit foundation setting: 1, throttle valve body failure; 2. Line aging; 3. The air gate is faulty. Take the 2020 Passat as an example, it is a medium-sized car, equipped with 1.4t inline four-cylinder turbocharged engine, with maximum horsepower 15ps, maximum torque of 250nm and maximum power1/0kw, which is matched with a 7-speed dual-clutch gearbox. The body dimensions of 2020 Passat are: length 4933mm, width 1836mm, height 1469mm, wheelbase 287 1mm, minimum clearance from the ground 150mm, and body weight 1470kg.