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Home >> Genesis >> 2018 >> G80 3.8, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 3.8L (1 Of 3) >> DTC P0154: O2 Sensor Circuit No Activity Detected (Bank 2/Sensor 1) >> Component Inspection >> Check The Signal Waveform Of HO2S
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Check The Signal Waveform Of HO2S

  1. IG "OFF". Connect HO2S connector.
  2. Connect probe to HO2S to measure signal waveform using oscilloscope function. Start engine.
  3. After warming-up, monitor signal waveform of HO2S with GDS.
    G12653859Courtesy of HYUNDAI MOTOR AMERICA
    G12653860Courtesy of HYUNDAI MOTOR AMERICA
  4. Is the sensor switching properly?

    YES 

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

    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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