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Home >> Kia >> 2005 >> Rio Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures >> DTC Troubleshooting >> 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
    • Damage, and for loose or missing hardware
  2. Was a problem found in any of the above areas?

    YES

    1. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO

    1. Go to "REAR HO2S INSPECTION " procedure.
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