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Home › Genesis › 2018 › G80 3.8, AWD › Repair and Diagnosis › 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

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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