Can a bad catalytic converter cause your car to rough idle?

I’ve noticed that when my car has been shaking or vibrating while idling. After some troubleshooting, I’m pretty certain that the fuel injectors, spark plugs, and air filters aren’t the problem. But could a faulty catalytic converter be causing the rough idle?

Find out if you’re getting ripped off on your car insurance in less than two minutes.
No spam · No long forms · No fees
Find savings (100% Free)
rating white
3.5k Ratings
Answer provided by
Annette Maxon
Answered on Apr 28, 2022
Well, you’ve definitely done your homework!
Yes, a bad catalytic converter can cause a rough idle. This is because less exhaust will be able to escape, in turn reducing the amount of oxygen that can enter and combust in the engine.
It’s best practice to replace the catalytic converter sooner than later. Though it’s not dangerous to drive short distances with a faulty converter, driving with one for extended periods of time will damage your engine.
However, now’s a good time to check your insurance policy for towing and labor coverage—this additional coverage may help cover the labor costs involved with this repair.
If you don’t have towing and labor coverage or are interested in finding a better insurance policy, Jerry has you covered.
A licensed broker, the Jerry super app does all the hard work of finding cheap quotes from the top name-brand insurance companies and buying new car insurance. Jerry will even help you cancel your old policy.

Here to save on car and home insurance? Great, you do that. We’ll do everything else.

Sign up in under a minute.
No need to fill out forms or shop around. Sign up in 45 seconds to start saving. Jerry does the rest.
Jerry collects and analyzes your current coverage.
Say hello to Jerry, your new insurance agent. We’ll contact your insurance company, review your current plan, then find the coverage that fits your needs and saves you money.
Get the best options before your renewal.
Jerry does all the picky, busy work by comparing prices and coverage from more than 50+ insurance companies. We compare what we find to your current policy and offer you the three best options before every renewal.