What is the cause of the fault light of Volkswagen esp?

The reasons of Volkswagen esp fault light are: the throttle valve is too dirty; Brake switch and circuit failure; Air intake system failure; The selected fuel does not meet the standard. Volkswagen's models are: Golf, Citroen C4L, Corolla, Tango, LaVida, Beetle, Sagitar and so on. Take the pure version of Golf Lv Jia 2020200tsi Auto Conservation as an example, which is a compact car. The length, width and height of the car are 435 1mm, 1.807mm and 1.574mm, respectively, with a wheelbase of 2,685mm and a fuel tank volume of 50l. Golf Lv Jia 2020 200TSI Auto-Curious pure edition is equipped with 1.2T turbocharged engine, with maximum power of 85 kW, maximum power speed of 5000-6000rpm, maximum torque of 200 Nm and maximum torque speed of 2000-3500rpm.