Clogged Catalytic Convertor on a 2018 F250 Super Duty

In this video we're replacing a catalytic convertor on a 2018 F250 Super Duty with a 6.2L engine. We use a borescope to look inside the convertor and inspect the damage to the ceramic honey comb. The vehicle was setting a convertor efficiency code and misfire codes, P0301 and P0302 under heavy load due to the back pressure build up.

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But why are so many 6.2 cats failing, that's the question.