How to Check a Catalytic Converter Is Clogged?

Illustration of checking a clogged catalytic converter, including temperature testing, using an OBD-II scanner, and performing an exhaust backpressure test.

A clogged catalytic converter can cause significant issues with your vehicle’s performance, including reduced power and efficiency. But how to check a catalytic converter is clogged? In this article, we’ll walk you through the signs of a clogged converter and the steps you can take to diagnose the issue effectively. Signs of a Clogged Catalytic Converter Recognizing the symptoms of …

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