It's worth trying to clean the catalytic converter as a first step, as it might resolve the issue if it's just a minor clog. Use a catalytic converter cleaner and follow the instructions carefully. If the light remains on, further inspection might be needed. Let me know how it goes or if you have any other questions!

Tenho um Nissan Note e a luz de controlo do motor está acesa. Recebi uma mensagem P0420. É aconselhável tentar limpar primeiro o catalisador antes de dar outros passos?

Mensagem P0420: Devo limpar o catalisador?