What is the reason for the old Jetta epc fault light?

The following are the reasons for the failure of Jetta's epc light: 1, and the brake light is off: when the vehicle brake light is off, the EPC fault light will appear. 2. Throttle failure: If there is a problem with the engine throttle or line, EPC will also light up. 3. Clutch switch is damaged: Like brake switch, EPC will appear when clutch switch is damaged. Engine control unit: according to the position data fed back by the pedal sensor, calculate the optimal target throttle opening, and send a signal to the throttle drive motor to make the throttle rotate to this angle.