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Common Issues and Maintenance Tips for Catalytic Converters

July 23th, 2023

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Catalytic converters play an important role in reducing harmful vehicle emissions, but they are susceptible to certain issues that can affect their performance. Understanding these common problems and implementing proper maintenance practices can help prolong the life of your catalytic converter and ensure it functions as it should. Let's discuss some of the common issues faced by catalytic converters and provide maintenance tips to keep them in good condition.

Common Issues and Maintenance Tips:

Carbon Buildup

Carbon buildup is a common problem in catalytic converters that can result from incomplete combustion or contaminants in the fuel. Over time, this buildup can restrict the flow of exhaust gases and reduce the converter's efficiency.

Maintenance tip: Regularly using a fuel system cleaner can help prevent carbon buildup. Additionally, make sure you use high-quality fuel to minimize the accumulation of contaminants.


Excessive heat can cause damage to the internal parts of a catalytic converter, leading to reduced performance or even complete failure. Overheating can be caused by issues such as engine misfires, exhaust leaks, or rich fuel mixtures.

Maintenance tip: Address any underlying issues that may contribute to overheating promptly. Regularly inspect the exhaust system for leaks and have any detected problems repaired by a professional.

Physical Damage

Catalytic converters are located underneath the vehicle, making them susceptible to physical damage from road debris, speed bumps, or rough driving conditions. A damaged converter can result in decreased performance and increased emissions.

Maintenance tip: Consider installing an undercarriage shield plate to protect the catalytic converter from physical damage. Regularly inspect the shield for any signs of wear or damage and replace it if necessary.

Oxygen Sensor Malfunction

The oxygen sensor plays a crucial role in regulating the air-fuel mixture in the engine. If the oxygen sensor malfunctions, it can cause improper fuel-air ratios, leading to increased emissions and potential damage to the catalytic converter.

Maintenance tip: Regularly check the oxygen sensor's functionality and replace it as recommended by the vehicle manufacturer. If you notice any warning signs, such as decreased fuel efficiency or engine performance, have the sensor inspected by a qualified technician.

Where Can I Order a Catalytic Converter Shield Online?

You can protect your investment and order a catalytic converter shield right here at Cat Securityª. We have a wide selection of undercarriage shield plates that fit various models, including the Honda CR-V, Toyota Prius, and the Ford Expedition. Our shields are designed for straightforward installation. They come with detailed instructions and the necessary hardware, allowing you to install them with ease.

Protect and Preserve Your Catalytic Converter with Proper Maintenance

Taking care of your catalytic converter is essential for both environmental reasons and the longevity of your vehicle. By addressing common issues and following proper maintenance practices, you can ensure that your catalytic converter functions optimally for a longer period. Remember, prevention is key, so be proactive in maintaining your converter to avoid costly repairs or replacements in the future.