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Home >> Hyundai >> 2009 >> Elantra GLS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures >> DTC P0133 Ho2S Circuit Slow Response (Bank 1/Sensor 1) >> Component Inspection

Component Inspection

  1. Visually/physically inspect the following conditions:
    • Inspect the front HO2S for any silicon contamination. This contamination will be indicated by a white powdery coating and this will result in a but false voltage signal
    • If contamination is evident on the HO2S, replace contaminated sensor and go to  2.
  2. Warm up the engine to normal operating temperature and let it idle.
  3. Connect Scantool and monitor the O2 SNSR V0L.-B1/S1 parameter on the Scantool data list.

    Test Condition:  Engine "ON" & In Closed loop mode

    Specification: 

  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 

    • 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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