Hi sorry my english is low.
my car- skoda octavia, 2,0l, year- 2002, benzine, 85kw, engine code- AZJ

When you start up the car and running normally sometimes and sometimes increase to maximum engine speed when the brake pedal, the engine speed is normal as I let the brake pedal, increasing the maximum engine speed of about 5000ot. Throttle, brake and when I enable it opens and closes the bay and grow to maximum speed. Heating gas pedal does not work at all (does not add speed, as if there is not). Diagnostics says 18042- accelerator pedal position sensor, 00943- exterior mirror heating, 00856- radio antenna. Heating gas pedal is a new original replacement.