Monitor SCANTOOL Data

NOTE: If any codes relating to Rear HO2S or TWC (Three Way Catalyst Converter) are stored, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting tree.

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: Scantool Display - DTC Title
  Courtesy of HYUNDAI MOTOR CO.
5. Is parameter displayed "History (Not Present) fault"?
  NOTE:
  - History (Not Present) fault: DTC occurred but has been cleared.
  - Present fault: DTC is occurring at present time.
  YES
  - Fault is intermittent caused by poor contact in the sensor' s and/or PCM' s connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, ending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Go to "COMPONENT INSPECTION " procedure.