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VIDEO: Is the Converter to Blame? Diagnosing DTC P0420

TechShop Managing Editor Eric Garbe describes what you need to know when the scan tool is reading a diagnostic trouble code of P0420 Catalyst System Efficiency Below Threshold.

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TechShop Managing Editor Eric Garbe describes what you need to know when the scan tool is reading a diagnostic trouble code of P0420 Catalyst System Efficiency Below Threshold.

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