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Home >> Mercury >> 1994 >> Capri Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Oxygen Sensor (O2S)
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Oxygen Sensor (O2S)

This sensor is threaded into the exhaust manifold. It senses oxygen concentration in the exhaust gas. The PCM uses this signal for calculating fuel metering, idle speed control, and canister purge valve operation.