Axio2010

Dear Members, I have a Toyota Axio 2009,,,,Done 23000km I am experiencing a jerk when car accelerating from low speed. This is happening all engine Temperatures. Car is doing 11+/liter in the city...Recently I did a service and change OIl and both Oil and Air filters. I searched regarding this on the web and found a suggestion that there is sensor in acceleration pedal, if settings or sensor has gone wrong this can be happened. At the same time car has a Vibration when stop at Traffic.... I hope to take car to the Agent and find out what has gone wrong...Do you guys have any suggestions