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Home >> Hyundai >> 2009 >> Elantra GLS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures >> DTC P0140 Ho2S Circuit No Activity Detected (Bank 1/Sensor 2) >> Terminal And Connector Inspection

Terminal And Connector Inspection

  1. Ignition "ON" & Engine "OFF"
  2. Monitor the O2 SNSR V0L.-B1/S2 parameter on the Scantool data list while wiggling the wiring harness and related connectors.
  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 ECM)
    • Check for damaged wiring
    • Check the HO2S ground circuit for a good connection
    • Check the 15A sensor2 fuse
    • Check front and rear HO2S for connections being reversed.
  4. Was a problem found in any of the above areas?

    YES 

    NO 

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