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Home >> Hyundai >> 2007 >> Azera GLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 2) >> DTC Troubleshooting Procedures >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> Monitor SCANTOOL Data
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Monitor SCANTOOL Data

  1. Check DTC Status
    1. Connect scantool to Data Link Connector (DLC).
    2. IG "ON".
    3. Select "Diagnostic Trouble Codes (DTCs)" mode, and then Press F4 (DTAL) to check DTC's information from the DTCs menu
    4. Read "DTC Status" parameter.
      Fig 1: Scan Tool Display - DTC Title
      G05344870
    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 

      • Go to "COMPONENT INSPECTION" procedure below.
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