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Home >> Subaru >> 1995 >> Legacy Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Oxygen (O2) Sensor

Oxygen (O2) Sensor

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Sensor generates voltage according to exhaust gas oxygen content. Signal voltage increases when oxygen content is low (rich), and decreases when oxygen content is high (lean). ECM controls air/fuel ratio based on voltage generated.

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