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Home >> Hyundai >> 2020 >> Elantra Value Edition >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 2.0L (2 Of 6) >> DTC P0140-00: O2 Sensor Circuit No Activity Detected (Bank 1/Sensor 2) >> Wiring Inspection >> Terminal And Connector Inspection

Terminal And Connector Inspection

  1. IG "ON".
  2. Monitor the O2 SNSR VOL.-B1/S2 parameter on the Scantool data list while wiggling the wiring harness and related connectors. Refer to "Signal Waveform And Data" in the "General Information" procedure.
  3. The value should remain more or less unchanged. If not, check for the following conditions:
    • Check for corrosion on terminals
    • Check for terminal tension (at the HO2S and at the PCM)
    • Check for damaged wiring
    • Check the HO2S ground circuit for a good connection
    • Check the 15A sensor 2 fuse
    • Check front and rear HO2S for connections being reversed
  4. Was a problem found in any of the above areas?

    YES 

    NO 

    • Go to next step as below.
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