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Home >> Hyundai >> 2006 >> Azera SE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC Troubleshooting Procedures >> DTC P0139 Ho2S Circuit Slow Response (Bank 1 / Sensor 2) >> Monitor SCANTOOL Data

Monitor SCANTOOL Data

  1. Connect Scantool then Engine "ON"
  2. Warm up the engine to normal operating temperature.
  3. Monitor the signal waveform of HO2S (B1 S2) with scantool

    Specification: 0.1 ~ 0.9V

    Fig 1: Signal Waveform Graph
    G04884446Courtesy of HYUNDAI MOTOR CO.
  4. Is the shift time from signal waveform within specifications ?

    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, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure

    NO 

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