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Home >> Subaru >> 1987 >> DL 4D Sedan, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> SPFI CEC System >> Operation >> Oxygen Sensor
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Oxygen Sensor

The oxygen sensor is mounted on the center exhaust pipe. It is used to sense oxygen concentration in exhaust gas.

By sending this information to SPFI control unit, air/fuel ratio of supplied mixture can be determined easily. Voltage characteristics stabilize at temperatures of approximately 572-752°F (300-400°C).