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Home >> Ford >> 2005 >> Focus ZX5 S, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Description & Operation (Except Diesel & Hybrid) >> Catalyst and Exhaust Systems >> Heated Oxygen Sensors (HO2S)

Heated Oxygen Sensors (HO2S)

The HO2S provide the powertrain control module (PCM) with voltage and frequency information related to the oxygen content of the exhaust gas. For information on the HO2S, refer to POWERTRAIN CONTROL MODULE (PCM) INPUTS .