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Home >> Hyundai >> 2009 >> Elantra Touring Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures >> Inspection Chart For Diagnostic Trouble Codes (DTC) >> P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1) >> Component Inspection
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Component Inspection

  1. Visually/physically inspect the following conditions:
    • Ensure that the HO2S is securely installed.
    • Silicon contamination. This contamination will be indicated by a white powdery coating on the portion of the sensor exposed to the exhaust stream and this will result in a but false (high) voltage signal.
    • Fuel, engine coolant or oil contamination.
    • Use of improper sealant.
    • If contamination is evident on the HO2S, Fix the source of the sensor contamination before replacing the sensor to prevent future contamination. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  2. Warm up the engine to normal operating temperature and let it idle.
  3. Connect GDS and monitor the O2 SNSR VOL.-B1/S1 parameter on the GDS data list.

    Specification :  Refer to Signal Waveform & Data in the "General Information" procedure. Verify signal is switching from rich (above 0.45V) to lean (below 0.45V) a minimum of 3 times in 10 seconds (voltage will vary between 0.1 and 0.9V) at idle.

  4. Is sensor switching properly?

    YES 

    • Check for poor connection between PCM 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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