Envoy 2WD V6-4.3L VIN W (1998)
Oxygen Sensor: Description and Operation
Fuel Control HO2S
Heated Oxygen Sensor (Cutaway View)
DESCRIPTION
The Heated Oxygen Sensors are mounted in the exhaust system where they can monitor the oxygen content of the exhaust gas stream.
OPERATION
The oxygen present in the exhaust gas reacts with the sensor to produce a voltage output. This voltage should constantly fluctuate from approximately
