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Home › Hyundai › 2011 › Azera GLS › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (2 Of 3) › DTC P0420: Catalyst System Efficiency below Threshold (Bank 1) › Scantool Diagnostics › Monitor Scantool Data

Monitor Scantool Data

  1. Connect scantool to Data Link Connector(DLC).
  2. IG "ON".
  3. Select "DTC" button, and then Press "DTC Status" to check DTC's information from the DTCs menu.
  4. Read "DTC Status" parameter.
    Fig 1: Display DTC Status Parameter
    G07251868Courtesy of HYUNDAI MOTOR CO.
  5. Is parameter displayed "Present fault"?

    YES 

    • Substitute with a known - good Catalyst Converter and check for proper operation. If the problem is corrected, Go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

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