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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 >> Exhaust System For Restriction Or Leakage

Exhaust System For Restriction Or Leakage

WARNING: This page is about a different variant/trim than selected.
  1. Refer to "INTAKE AND EXHAUST SYSTEM - 2.0L (EXCEPT HEV) " and viasullay and/or physically inspect following conditions;
    • Exhaust System between O2 Sensor and Three-Way Catalyst Converter for air leakage, restriction and damage.
    • Damage and for loose or missing hardware
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