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 do I know if my catalytic converter has failed?

Exhaust emissions test check for the absence of a catalytic converter or a malfunctioning one during an emissions inspection. Read on to learn how you can find out if your catalytic converter has failed.


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 »