hyundai Workshop Repair Guides

Hyundai Workshop Service and Repair Manuals

Diagram Information and Instructions|Page 1068 > < Diagram Information and Instructions|Page 1066
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Oxygen Sensor: Testing and Inspection

Circuit Diagram

Troubleshooting Hints

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If the HO2S is defective abnormally high emissions may occure.

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If the HO2S check has resulted normal but the sensor output voltage is out of specifications, check for the following items related to air fuel ratio
control system.
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Faulty injector

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Air leaks in the intake manifold.

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Faulty volume air flow sensor, intake air temperature sensor, barometric pressure sensor, engine coolant temperature sensor.

Using scan Tool 

Diagram Information and Instructions|Page 1068 > < Diagram Information and Instructions|Page 1066