scotty, i enjoy your site and wonder if you could help me. i have an toyota 2004 camry with 155k miles and i just got a check engine fault Po420.. i need an emissions inspections and it won't pass. what can i do?

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ScottyKilmer
ScottyKilmer

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replace the cat, but sometimes cleaning fixes it https://www.youtube.com/watch?v=5icTmYItwiE

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