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Home >> Hyundai >> 1990 >> Excel Base, 4D Sedan, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Oxygen Sensor
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Oxygen Sensor

Oxygen (O2) sensor is located in exhaust system. Output voltage of oxygen sensor varies with oxygen content in exhaust gas stream. Oxygen sensor signal to ECU is used to control fuel delivery time.