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Home >> Plymouth >> 1989 >> Horizon Automatic >> Repair and Diagnosis >> Engine Performance >> System >> 2.2L/2.5L SPFI Tests/Code >> Operation >> Oxygen Sensor

Oxygen Sensor

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The O2 sensor is used by SMEC to measure oxygen content in the exhaust. The sensor is electrically heated for faster switching during engine operation. If O2 sensor measures a lean mixture, sensor will produce a low voltage. If O2 sensor measures a rich mixture, sensor will produce a high voltage.