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Home >> Hyundai >> 2007 >> Elantra GLS, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System (G4GC-GSL 2.0) >> DTC Troubleshooting Procedures >> DTC P0140 Ho2S Circuit No Activity Detected (Bank 1/Sensor 2) >> 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 V0L.-B1/S2 parameter on the Scantool data list.

    Specification : Above 0.7V at idle

  4. Is sensor switching properly?

    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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