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Auto | Under the Hood | Exhaust & Emissions

This section can help you keep your exhaust system working properly. Learn how mufflers, catalytic converters and oxygen sensors work.

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How Catalytic Converters Work

A catalytic converter is one of the most important parts of a car's emissions control system. It treats the exhaust before it leaves the car and removes a lot of the pollution. Learn how they work.


How does the oxygen sensor in a car work?

How does the oxygen sensor in a car work?

How does the oxygen sensor in a car work? See more »

What is a catalytic converter and how does it work?

What is a catalytic converter and how does it work? See more »