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Home >> Hyundai >> 2021 >> Elantra N Line, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 34 (Engine Control System Diagnosis - 2.0L (Except HEV) (3 Of 6)) >> DTC P0420-00: Catalyst System Efficiency Below Threshold (Bank 1) >> DTC Information And Inspection >> Component Inspection >> Three-Way Catalyst Converter Inspection

Three-Way Catalyst Converter Inspection

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  1. Refer to "INTAKE AND EXHAUST SYSTEM - 2.0L (EXCEPT HEV) " and viasullay and/or physically inspect following conditions;
    • Severe discoloration caused by excessive temperature.
    • Dents and holes.
    • Internal rattle caused by a damaged catalyst.