Skip the auto shop - Our mechanics make house calls

Q: Problems with my catalytic converter

asked by on

I am not quite sure what is wrong with my car. I believe it may be the catalytic converter.

Lets talk about the catalyst converter and what kind of problems it can cause a car to have when it fails. One of the most common types of failures is when it just quits doing its job. The computer has sensors before and after the converter they monitor the exhaust to see if the converter is doing its job of removing harmful contaminants from your vehicles exhaust. When the computer sees that the converter is no longer being a good filter it will set codes. These codes turn on your Check Engine Light. Although most likely you would feel no difference in the running of your car, your car would fail an emission test. Now another way a converter can fail is the plates inside of it can weld together and form a plug in the exhaust, if your engine runs long enough with this restriction it can cause damage, I have seen it cause head gasket failure even melt plastic intakes. But the good part here is you won’t need a light to know you will have a problem because your car would have lost power, you would be towing or driving it to the nearest shop. And finally another way for the converter to cause you issues those plates we just talked about, occasionally they can break loose inside and when they do it causes a very annoying rattle. This rattle can occur at different times under different conditions. If your car is having any of those issues, have a mechanic take a look at it for you to see if you need a catalytic converter replacement.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Problems with my catalytic converter

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Power steering and oil leaks - 2000 Kia Sephia

Hi there. If you are having multiple leaks on the vehicle, the first thing you would need to do is degrease the vehicle and recheck to see where the oil leaks are coming from. The power steering could be just...

Q: Can a catalytic converter with manifold from a Nissan Titan fit a Nissan Pathfinder Armada

If they are both 2004 models, with the 5.6l V8, then yes, in this case, this appears to be a direct replacement. You should confirm this with whoever the parts supplier is for this part. If you need assistance with...

Q: Loud exhaust after pothole

The muffler generally isn't covered under any recalls or Technical Service Bulletins (TSB) that Toyota has issued to date, as the corrosion you're experiencing can be influenced by a lot of variables including the environment. For example, if you live...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.