Can a Bad o2 Sensor Cause Catalytic Converter to Fail?

Car's exhaust system with a failing O2 sensor causing catalytic converter damage.

A catalytic converter is essential for reducing harmful emissions from your vehicle’s exhaust system, while oxygen (O2) sensors monitor the fuel-air ratio in your engine. Together, they play a crucial role in keeping your vehicle running efficiently and in compliance with emissions standards. But can a bad O2 sensor cause the catalytic converter to fail? The short answer is yes. …

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Bad O2 Sensor or Catalytic Converter: How to Tell the Difference

Exhaust system highlighting the locations of O2 sensors and the catalytic converter, with indications of common signs of failure.

When your vehicle’s check engine light comes on, it can be caused by various factors, but two of the most common culprits are a bad O2 (oxygen) sensor or a failing catalytic converter. Both components play vital roles in your vehicle’s exhaust and emissions systems, but how do you determine which one is causing the issue? Understanding the differences between …

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