Monitor SCANTOOL Data

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

Check DTC Status
1. Connect scan tool to Data Link Connector (DLC).
2. IG "ON".
3. Select "Diagnostic Trouble Codes (DTCs)" mode, and then Press F5 (INFO) to check DTC's information from the DTCs menu
4. Read "DTC Status" parameter.
  
  Fig 1: Scan Tool Display - DTC Status
  Courtesy of KIA MOTORS AMERICA, INC.
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.