How to reset the check engine light on my 2004 Audi A2?

I recently replaced the spark plugs on my 2004 Audi A2, but the check engine light is still on. How can I reset it?

First, make sure the spark plugs are properly installed and the connections are secure. Then, disconnect the negative terminal of the car battery for 5-10 minutes to allow the computer to reset. Reconnect the battery and start the car, the check engine light should be gone.

Another option is to use an OBD-II scanner to clear the codes from the car's computer. It's a more precise and efficient method, but it requires a specialized tool. You can borrow one from a local auto parts store or have a mechanic do it for you.

Some Audi A2 models have a reset button under the dashboard near the steering wheel. Press and hold it for 10 seconds while the car is off, then start the car and see if the light is gone. If not, try disconnecting the battery as mentioned before.