How can I check if my Audi A2's throttle is malfunctioning?

I recently noticed that my Audi A2's acceleration is not as smooth as it used to be. I suspect it could be a problem with the throttle. How can I confirm if this is the issue?

First, try to start the engine and listen for a hissing sound coming from the throttle body. If you hear it, then it could be a sign of a leak or malfunctioning throttle plate. I recommend taking your car to a certified mechanic for a thorough inspection.

Check the throttle position sensor by using a multimeter to measure its voltage. If the reading is not within the manufacturer's specifications, then it could be causing the issue. You can try to replace the sensor or consult a mechanic for further assistance.

A dirty throttle body can also cause acceleration issues. Try cleaning it using a throttle body cleaner and a rag. If the problem persists, then it could be a more serious issue and you should take your car to a professional for a diagnosis.