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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls - Description & Operation - (Hybrid)) >> Catalyst and Exhaust System >> Heated Oxygen Sensors (HO2S)

Heated Oxygen Sensors (HO2S)

WARNING: This page is about a different variant/trim than selected.

The HO2S provide the PCM with voltage and frequency information related to the oxygen content of the exhaust gas. For additional information on the HO2S, refer to ENGINE CONTROL COMPONENTS .

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