Your car’s catalytic converter reduces harmful emissions and keeps your engine running efficiently. But like any other part, it wears out over time. If your vehicle is experiencing sluggish performance, strange smells, or warning lights on the dashboard, your catalytic converter may be the culprit. Ignoring the signs of a failing converter can lead to more serious engine problems, costly repairs, and even a complete breakdown. Here’s how you can tell if it’s time to replace your catalytic converter.

Decreased Engine Performance

One of the first signs of a failing catalytic converter is a noticeable drop in engine performance. If your car feels sluggish when accelerating, struggles to maintain speed, or has difficulty climbing hills, it could be due to a clogged or malfunctioning converter. Since the catalytic converter is responsible for filtering out harmful gases, a blockage can restrict exhaust flow, reducing power and efficiency.

In severe cases, your car may stall or hesitate when you press the gas pedal. If you’ve noticed a significant change in how your car drives, it’s best to have the catalytic converter inspected to avoid further damage.

Check Engine Light Comes On

The check engine light can illuminate for a variety of reasons, but a failing catalytic converter is a common cause. Modern vehicles have oxygen sensors that monitor emissions, and if the catalytic converter isn’t working properly, these sensors will trigger the warning light.

If your check engine light is on and you suspect a converter issue, a diagnostic scan at an auto repair shop can confirm the problem. Driving with a faulty converter can lead to reduced fuel efficiency and increased emissions, so it’s best to address it sooner rather than later.

Rotten Egg or Sulfur Smell

A healthy catalytic converter should effectively break down exhaust gases without emitting any noticeable odors. However, if you start to notice a strong, rotten egg smell coming from your exhaust, it could indicate that the converter is failing.

This odor is caused by unburned fuel containing sulfur, which builds up when the catalytic converter can’t process emissions properly. If left unchecked, the problem can worsen, leading to excessive buildup and potential engine failure.

Rattling Noises Under the Car

If you hear a rattling noise coming from underneath your car, particularly when you start the engine or accelerate, your catalytic converter might be deteriorating internally.

Over time, the materials inside the converter can break down, leading to loose components that rattle around inside the housing. This is usually a sign that the converter is nearing the end of its lifespan and should be replaced before it becomes completely clogged or disintegrates.

Excessive Exhaust Smoke or Dark Emissions

Your vehicle’s exhaust should be relatively clear under normal conditions. If you notice thick, dark smoke coming from the tailpipe, your catalytic converter may not be filtering emissions effectively.

A malfunctioning converter can cause incomplete combustion, leading to an increase in pollutants released into the air. Not only is this harmful to the environment, but it can also make your car fail an emissions test if one is required in your state.

Is It Time to Replace Your Catalytic Converter

If you’re experiencing one or more of these symptoms, it’s important to have your catalytic converter checked as soon as possible. A failing converter can cause strain on your engine, reduce fuel efficiency, and even lead to costly repairs if ignored.

Getting a professional inspection from PRO-CAT Auto Care & Repair is the best way to determine whether your catalytic converter needs to be replaced. An experienced technician can assess your exhaust system, check for blockages, and recommend the best course of action to restore your vehicle’s performance.

Check engine light on? Rattling under your car? These are signs of a failing catalytic converter. PRO-CAT Auto Care & Repair in Toms River, NJ, offers expert diagnostics and replacements to keep your vehicle running efficiently. Visit us today for a full inspection!