Oxygen Sensor: Description and Operation

DESCRIPTION
The Heated Oxygen Sensors (HO2S) are located in the dual converter Y pipe below the exhaust manifolds and below the catalytic converters.

OPERATION
The heated oxygen sensors react with the oxygen in the exhaust gases and generate a voltage based on this reaction.
- A low voltage indicates too much oxygen or a lean condition.
- A high voltage indicates not enough oxygen or a rich condition.