Monitor Scan Tool 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
Connect scan tool to Data Link Connector (DLC).
IG "ON".
Select "DTC" button, and then Press "DTC Status" to check DTC's information from the DTCs menu
Read "DTC Status" parameter.

Fig 1: Screen Display - DTC Status
Courtesy of KIA MOTORS AMERICA, INC.
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.