Is Your Catalytic Converter Going Bad?

March 18, 2020

The exhaust system is one of your vehicle's most important systems. It expels harmful gases from the engine , allowing it to "breathe" and run better. The most important component within your exhaust system is the catalytic converter. It burns off these gases and pollutants for safer emissions.

If your catalytic converter is damaged or clogged, you can usually still drive the vehicle. However, it will potentially lead to some more significant issues. You will generally lose fuel economy. Exhaust leaks can develop. Worst of all, engine damage can occur and it probably won't be cheap to repair. At the first sign of catalytic converter failure or any other exhaust system issues, you will want to bring your vehicle to a professional auto repair shop.

Colorado Springs' own LightHouse Automotive has identified these 6 signs that your catalytic converter might be going bad:

1. Sluggish Engine 

You can usually tell when your engine is acting sluggish. You give it power, but it just doesn't respond like it normally does. Sometimes this can be the result of a transmission or fuel system issue, but it could also be a clogged catalytic converter that is not allowing the engine to breathe properly.

2. Check Engine Light

A failing catalytic converter is one of the most common reasons why your check engine light might come on. It could also be a tripped or damaged oxygen sensor, which is another typical exhaust system problem. Any time your check engine light comes on for any reason, it's a good idea to get it checked out by a professional mechanic so that the issue can be identified and resolved properly.

3. Dark Exhaust Smoke

If you notice that there is dark smoke coming out of your car's tailpipe, it means there is some kind of exhaust system issue and there's a good chance it's a problem with the catalytic converter.

4. Rattles and Vibrations

Many drivers have also reported rattling sounds and vibrations associated with catalytic converter damage. Again, any time you hear or feel something odd with your car, it's best to have a professional provide a thorough mechanical inspection and run diagnostic tests.

5. Bad Smells

If your car smells like sulfur or rotten eggs when it's running, that is a common sign that the catalytic converter isn't working correctly and the exhaust gases aren't being burned off as they are supposed to.

6. Excessive Heat Under the Vehicle

This could be a hard one to notice unless you actually get under your car. Still, you might feel an unusual amount of heat on your legs when you step outside the vehicle after it's been running for awhile. Excessive heat is often a result of a struggling catalytic converter.

If you are in the Colorado Springs area and notice any of these issues or other potential problems with your engine or exhaust system, call LightHouse Automotive at (719) 465-0302 or schedule an appointment online. We'll uncover the source of the problem and recommend the necessary automotive repairs.

Can Depression Affect Your Ability to Drive Safely? | LightHouse Automotive
By Written by Kukui April 25, 2025
LightHouse Automotive in Colorado Springs, CO, explores how depression can impact driving focus, reaction time, and overall road safety.
Family supporting
March 18, 2025
Support Tia and the Blair Family in Their Time of Need - Lighthouse Automotive
oil leaks | LightHouse Automotive
January 31, 2025
Oil leaks might seem minor, but ignoring them can lead to significant problems for your car.
Our team | LightHouse Automotive
January 23, 2025
Thank you for visiting the LightHouse Automotive Blog. This is the first of what will be many weekly articles featured on this site. Our goal is to provide helpful car care information while also offering insight into the way we do business. You can follow the blog here or like us on Facebook to receive updates when new articles are posted each week. About UsLightHouse Automotive LLC opened in 2003 by owners Rylan and Tia Blair, and we have been an integral part of the Colorado Springs auto repair industry ever since. We take pride in providing quality automotive services with a personal touch. We provide ... read more
exhaust issues | LightHouse Automotive
December 20, 2024
The color of exhaust smoke can indicate the health of your engine and fuel system. Black smoke, in particular, is often a sign that your engine is burning more fuel than necessary.
Flat Tire Service | LightHouse Automotive
November 29, 2024
Let’s walk through the steps of changing a flat tire safely and efficiently.
Car Undercarriage | LightHouse Automotive
October 31, 2024
How can you safeguard your car from this winter menace? Let’s explore some effective strategies.
fall scenery | LightHouse Automotive
September 27, 2024
Here’s a guide on the eight essential steps to get your car winter-ready.
Vehicles at high elevation | LightHouse Autmotive
August 30, 2024
Driving through the Rocky Mountains can be an exhilarating experience, offering breathtaking views and challenging terrain. However, the higher you go, the more your car has to adapt to the changing conditions. Higher elevations can significantly impact your vehicle's performance, and it's crucial to understand these effects to ensure a smooth and safe journey. We'll explore the various challenges cars face at higher altitudes and provide tips on how to prepare for and mitigate these issues.
Transmission fluid flush | LightHouse Automotive
July 26, 2024
Transmission maintenance is one of those things that car owners often overlook until it's too late. But when it comes to keeping your vehicle running, few things are as important as a well-maintained transmission. Among the various maintenance tasks , technicians often recommend a transmission flush. But is it really necessary?
More Posts