Volkswagen Touran 2.0 cannot speed up. What's the problem?

Hello, the lack of speed is generally caused by the following aspects: electronic pedal failure; Throttle position sensor failure; The exhaust pipe three-way catalyst is blocked; Throttle filter is too dirty; Engine cylinder is missing (such as spark plug or high-voltage line leakage); Fuel pump failure or fuel pressure regulator failure, vacuum leakage of intake pipe; Transmission failure. Please check and confirm. If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.