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Catalytic Converter

Tech Tip: Follow These Steps Prior to Replacing Kia’s Catalytic Converter After Finding DTC P0422

Kia's OBD II engine management systems use dual oxygen sensors, which among other things allow monitoring of the efficiency of the Manifold Catalytic Converter (MCC), also referred to as the "warmup" cat. Some technicians who retrieve DTC P0422 - Main Catalyst Efficiency Below Threshold (Bank 1) mistakenly replace the catalytic...

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