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Home >> Hyundai >> 2010 >> Elantra GLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC P0140: O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2) >> Inspection Repair >> Component Inspection
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Component Inspection

  1. Visually/physically inspect the following conditions:
    • Ensure that the sensor is securely installed
    • Check for corrosion on terminals
    • Check for damaged wiring

    Repair as necessary and go to next step

  2. Warm up the engine to normal operating temperature and let it idle.
  3. Connect Scantool and monitor the O2 SNSR VOL.-B1/S2 parameter on the Scantool data list.

    Specification  : Above 0.7V at idle

  4. Is sensor data near the specified value?

    YES 

    • Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure

    NO 

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