F 550 4WD Super Duty V10-6.8L VIN S (2000)
Oxygen Sensor: Description and Operation
BI-Fuel Models
Heated Oxygen Sensors
NOTE: The descriptions and specifications contained here were in effect at the time it was approved for printing. Ford Motor Company reserves the
right to discontinue models at any time, or change specifications or design without notice and without incurring obligation.
The Compuvalve monitors upstream Heated Oxygen Sensors (HO2S). The upstream heated oxygen sensor (HO2S11) is used to control engine fuel
flow. The sensor detects the concentration of oxygen in the exhaust gas and sends a signal to the Powertrain Control Module (PCM) and to the
Compuvalve. In a rich condition, the HO2S will output a voltage of 0.6 volt or greater, and in a lean condition a voltage of 0.4 volt or less will be
output.
In the event that the HO2S fails, the Malfunction Indicator Lamp (MIL) will be illuminated.