Catalytic converter damage from severe overheating most likely results from an excessively lean air-fuel mixture, an excessively rich air-fuel mixture, or what other cause?

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The Answer of Catalytic converter damage from severe overheating most likely results from an excessively lean air-fuel mixture, an excessively rich air-fuel mixture, or what other cause?

Catalytic Converter Damage from Severe Overheating Most Likely Results from an Excessively