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Home >> Kia >> 2012 >> Optima Hybrid >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) - HEV >> DTC P0420: Catalyst System Efficiency below Threshold-Bank 1 >> Inspection Repair >> System Inspection >> Exhaust System Inspection

Exhaust System Inspection

  1. Visually/physically inspect the following conditions:
    • Exhaust system between HO2S and Three way catalyst for air leakage, restriction and damage.
    • Damage, and for loose or missing hardware:
  2. Was a problem found in any of the above areas?

    YES 

    NO 

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