Monitor GDS Data

Connect GDS to DLC (Data Link Cable).
Warm up the Engine to normal operating temperature.
Monitor "HO2S (S1)" parameter on the "Current Data" with GDS.

Fig 1: Monitoring HO2S (S1) Parameter On Current Data With GDS
Courtesy of HYUNDAI MOTOR AMERICA
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 AND CONNECTOR INSPECTION " procedure.
  NOTE: This DTC might be caused by the malfunction of Heater circuit, so, check the heater circuit first.