Elantra L4-1595cc 1.6L DOHC (1993)
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