Q: Problems with my catalytic converter

asked by on January 28, 2016

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

Catalytic Converter Replacement $279.51 - $3103.51 Get a Quote

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

my car wont crank after i replaced the radiator

Hi there. Most of the time, the issue you're experiencing is caused due to an electrical short that occurred while the radiator was being replaced. One of the first lessons we're taught in automotive technology is to always disconnect the...

My car shakes and jerks back when I accelerate. When stopped at a light vibration through steering wheel it is an Audi A4

Hi there. When you are getting an engine vibration as you described and you have a gas cap warning light issue, then it is likely that you have an issue with an EVAP canister or the purge solenoid. The canister...

2014 kia carens sometimes wont crank

You should start by cleaning the battery terminals and then see if this helps. If problem continues then the starter or starter relay may be causing the intermittent no crank condition as long as the theft system is not keeping...

Transmission problem?

This may be a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission...

I need to replace my serpentine belt, it with the power steering pump deleted. What size belt would I need? 2007 Mercury Milan

Hi there - this may or may not be possible. Bypassing the power steering pump may route the serpentine belt in conflict with other rotating components on the engine. Using a "soft measuring tape" (like a tailor uses), measure the...

My chevy hhr is having sluggish accerlation and knocking sounds in the front and rear wheels

Hello, thank you for writing in. The vehicle may be having engine issues, or it may be having wheel/suspension issues. The first thing to determine is if the noise occurs as long as the car is on, or if it...

My car was misfiring so i replaced spark plugs coil packs and fuel injectors my cylinder 1 is still misfiring what can it be

Since you were first showing misfire on number 5 cylinder and now you are showing misfire on number 1 cylinder. I have to say you introduced a problem on number one cylinder. I suggest first removing and checking the spark...

My car wont start, doesn't click and will not start with a jump either.

It sounds like your starter has failed. There is also a slight possibility that the alternator is bad but I would say starter first. I would start with a charging system test and figure out what is causing your vehicle...

Battery light on

Hello. If you continue to have a low voltage issue with the new alternator then there may be a circuit issue. Most of the time, if the alternator is good, it is the battery cables or there is an issue...

Related articles

Symptoms of a Bad or Failing Catalytic Converter
Common signs include reduced engine performance, rattling sounds, and the Check Engine Light turning on.
A Buyer’s Guide to the 2012 Kia Sportage
The The 2012 Kia Sportage is a compact Sub that offers quality, reliability, and great fuel economy. It has lots of nice features that come standard, an available turbocharged engine, and a sleek looking style that make it attractive to...
2005 Kia Sorento vs. 2005 Chevrolet Blazer: Which One Should I Buy?
SUVs are great for playing out in the mud, taking kids and friends around to different places, as well as just running errands around town. While they are not known to be terrific for gas mileage, that problem is negated...