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Value - Our Guarantee Jeff, Winter Springs, FL What is an Oxygen
Sensor? Oxygen sensors, also commonly referred to as a lambda
sensor, an air fuel ratio sensor (AFR or AF), or an O2 sensor,
were first used in an automobile in the late 1970’s, and are a
major component to all modern vehicles. There are many different
kinds of oxygen sensors, and each is designed and will function
differently. However, all oxygen sensors share the same purpose.
Without getting too complex, let’s explore the basics of
automotive oxygen sensors to give you a better understanding.
Oxygen sensors monitor the amount of oxygen within the exhaust
of a vehicle compared to the amount of oxygen in the air to
determine how rich or lean the engine is running, which is known
as the air / fuel ratio. This information is converted to
voltage and sent to the Engine Control Unit (ECU). When in
closed loop mode, the ECU