Monitor Scantool Data

Connect scantool to DLC (Data Link Cable).
Warm up the engine to normal operating temperature.
Monitor "HO2S (S1)" parameter on scantool.

Fig 1: Monitoring Oxygen Sensor (S1) Parameter On Scantool
Courtesy of KIA MOTORS AMERICA, INC.
Is the "HO2S (S1)" parameter displayed correctly?
YES

Fault is intermittent, caused by poor contact in the sensor's and/or ECM's connector, or was repaired and ECM 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 "TERMINAL & CONNECTOR INSPECTION " procedure.

NOTE: This DTC might be caused by the malfunction of Heater circuit, so, check the heater circuit first.