hyundai Workshop Repair Guides

Hyundai Workshop Service and Repair Manuals

Diagram Information and Instructions|Page 4449 > < Diagram Information and Instructions|Page 4447
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Oxygen Sensor: Testing and Inspection

CIRCUIT DIAGRAM

TROUBLESHOOTING HINTS

1. If the HO2S is defective, abnormally high emissions may occur.
2. If the HO2S check results were normal, but the sensor output voltage is out of specification, 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 air flow sensor, intake air temperature sensor, engine coolant temperature sensor.

Diagram Information and Instructions|Page 4449 > < Diagram Information and Instructions|Page 4447