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Home › Hyundai › 2011 › Azera GLS › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (3 Of 3) › DTC P2A00: HO2S Not Ready (Bank 1/Sensor 1) › Inspection Repair › Component Inspection

Component Inspection

  1. IG "OFF" and connect HO2S connector.
  2. Engine start.
  3. After warming-up, monitor signal waveform of HO2S with scantool.
    Fig 1: Measuring Signal Waveform Of HO2S With Scan Tool
    G07252487Courtesy of HYUNDAI MOTOR CO.
    Fig 2: Normal Waveforms Of Front HO2S And Rear HO2S (Chassis Ground Used)
    G07252488Courtesy of HYUNDAI MOTOR CO.
    Fig 3: Normal Waveforms Of Front HO2S And Rear HO2S (Sensor Ground Used)
    G07252489Courtesy of HYUNDAI MOTOR CO.
  4. Is the sensor switching properly?

    YES 

    • Check HO2S for poor connection/installation or damage. If O.K., Substitute with a known - good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
      NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by ECM. Before or after testing ECM on the vehicle, use this function to reuse the ECM on the others

    NO 

    • Substitute with a known - good HO2S and check for proper operation. If the problem is corrected, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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