How Do Oxygen Sensors Work?
Oxygen sensors are a key part of the vehicle emissions system. They measure the differential oxygen levels between the outside air and the exhaust gas to generate a voltage which is relayed to the vehicle’s central computer. This data is used to determine the fuel-to-air ratio of the engine and make the necessary adjustments based on the driving conditions. Depending on the vehicle or engine type, there may be up to four oxygen sensors.
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