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Oxygen Sensor

WARNING: This page is about a different car, the 1988 Subaru RX, 1988 Subaru GL-10, 1988 Subaru GL, and 1988 Subaru DL. However, it is still accessible from the selected car via links, so may be relevant.

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. Oxygen sensor output voltage stabilizes at temperatures of approximately 572°-752°F (300°-400°C).

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