LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2004 >> Excursion 6.8 S, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Theory & Operation - CNG, Flex-Fuel & Gasoline >> Catalyst and Exhaust Systems >> Exhaust System >> 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. (Refer to the PCM INPUTS  for a description of how the HO2S operates.)