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How can I troubleshoot a faulty catalytic converter in my Audi A2?

My Audi A2 recently started making strange noises and I suspect it may be due to a faulty catalytic converter. What steps should I take to diagnose and fix the issue?

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First, check your car's OBD-II codes for any specific error related to the catalytic converter. If there are no codes, a visual inspection of the converter may help identify any physical damage or blockages.

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