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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (Engine Controls - Theory & Operation - CNG, Flex-Fuel & Gasoline) >> Catalyst & Exhaust Systems >> Exhaust System >> Upstream & Downstream Heated Oxygen Sensors

Upstream & Downstream Heated Oxygen Sensors

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Heated Oxygen Sensors (HO2S) provide PCM with voltage and frequency information related to oxygen content of exhaust gas. For additional HO2S information, see HEATED OXYGEN SENSOR  under PCM INPUTS under COMPUTERIZED ENGINE CONTROLS.

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