How can I tell if my Audi A2's catalytic converter is failing?

My Audi A2 has been making strange noises and the check engine light is on. I suspect it may be a failing catalytic converter. What should I look out for and how can I confirm if it's the issue?

The most common signs of a failing catalytic converter are reduced engine performance, unusual smells, and a rattling noise from underneath your vehicle. To confirm the issue, have a professional mechanic conduct a diagnostic test and inspect the converter for visible damage or clogging.

If you've noticed a sudden decrease in fuel efficiency and the smell of rotten eggs coming from your exhaust, it's likely that your catalytic converter is not functioning properly. Bring your A2 to a mechanic for a thorough inspection and replacement if needed.