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Counterman Education Center

Oxygen Sensors vs. Air-Fuel Sensors

You might think of the air/fuel sensor as a smarter version of an oxygen sensor.

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Monitoring the amount of oxygen in a vehicle’s exhaust system is one way of gauging whether the correct air/fuel ratio is being used in the combustion chamber. 

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One of the components that does this is the oxygen sensor. The oxygen sensor detects the level of oxygen in the exhaust gases, to determine if the air-fuel mixture is rich – which means there’s too much fuel – or lean – which means there isn’t enough fuel being fed to the engine. This information is sent to the engine control unit, or ECU, which can make adjustments to the air-fuel mix as needed.

101-level stuff right? Well, what some of your customers might not know is that some vehicles come with a different sensor that serves the same purpose. We’re talking about the air/fuel sensor, or A/F sensor. Like the more well-known oxygen sensor, the A/F sensor helps create an optimal air/fuel mix by monitoring the level of oxygen in the vehicle’s exhaust gases. The A/F sensor even looks similar to the 02 sensor. But the similarities end there.

This video is sponsored by The Pronto Network.            

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