Code P0420 Honda Civic

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[XD] - P0420 code and O2 Sensor replacement | Hyundai Elantra Forum

Why am i getting p0420 and p0430 code at the same time? cause & fixes

P0420 honda: catalyst system efficiency below threshold explained

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Honda Pilot Code P0420 Bank 1 Sensor Location

2001 honda civic code p0420

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P0420 code

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