Top 10 Symptoms of Bad Catalytic Converter

#catalyticconverter
What is a Catalytic Converter?
A catalytic converter is an important part of the vehicle’s emissions system. A catalytic converter is a mechanical unit that converts toxic gases emitted from the IC engine into less-toxic pollutants by catalyzing a redox reaction. It is designed to extend the life of the vehicle but can fail if it becomes clogged.

Symptoms of Bad Catalytic Converter
1) Check engine light illumination
2) Poor Engine Performance
3) Black smoke from the exhaust pipe
4) Engine Misfires
5) Failed Emission Test
6) High or Low Fuel Consumption
7) Rattling Noise
8) Smell of Sulfur
9) Discolored Housing
10) Starting Issues

Disclaimer:
This video is just for educational purposes only. We are not in the auto repair business nor publish automotive service manuals. This video is not reviewed or authorized by any vehicle manufacturer. This video is intended only as general guidance. Every system is slightly different, so refer to the owner’s manual of your vehicle for any specific information about your model. Remember that only proper service and repair procedures will ensure your car's safe and reliable operation.

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[jeromemndzebele]

my car s catalytic converter we as stolen at a garage and soon as it was gone my car s performance decreased n indeed all what you just highlited is very true

[BillMonroe-vggn]

Usually never goes bad, however they do sometimes. Family member had a Chevy Blazer having engine problems, had check engine light,

Had over 120, 000 miles

Called me I said it might be plugs, spark, or anything 🤔

Took it straight to mechanic shop used that high tech computer mechanic, cost 3500 dollars

2 weeks later started acting up again, again called me I went there and tested the fuel pressure, spark plugs,

Funny but when you gave it gas the fuel pump pressure fell down terrible and it would miss,

Installed a 250.00 fuel pump never had no more issues,

They do go bad but check everything else never trust that computer shit !

[Metroooo_]

My mustang made rattling noises out of nowhere with me cruising like 45 and hasn’t stopped also check engine light came and the 02 sensor code came up and failed emissions is that catalyst failure ?

[CT-]

If you don’t want to run off of a cat converter look into carbon air intakes, it completely removes the cat converter and makes pure exhaust from the engine to the pipe

[MustangGuru]

I call Bs on the converters, cars can be tuned to have equal to or better output as a converter, However, the additives being mix in gas cause a concern, Gasoline of today is no where near as clean as it was 30yrs ago.

[tylerr]

I have 6. It’s a loud rattling noise almost reminds me of metal pot lids rattling together.

[tabyrearl]

I have only four out of the 10 symptoms, 2016 nissan frontier, it doesnt go fast like it did, sluggish exceleration, high fuel consumption, thats the main things . About two years ago i smelled sulfur for a while and i saw smoke come out tail a few times, . I may have smelled sulfer only a few times the past year. I took it in for a battery in 2023 when this started and they told me i need my fuel injection service and replaced spark plugs. I hope its not the CC thats a 2, 000$ part. But im worried is the sulfur smell mean its only the CC. Thankyou.... I goggled what else can smell like sulfur, it said CC, Fuel filter, fuel pressure sensor. So I'm thinking it's the fuel injection, like the man said at viking automotive.

[wafflytundra]

Hello i have a 2004 nissan titan would a bad oil filter make the vehicle not start btw im gonna get a new oil filter soon and im gonna get a catalytic converter and try and get a manifold too

[joeygitz]

Can a bad catalytic converter cause white smoke when I start the vehicle? Engine starts, a lot of white smoke and water from the exhaust which eventually goes away after a minute or two

[tommyverscetti]

I have a 2004 Honda Pilot, can a bad catalytic converter cause it it to start?

[guyelsenburg]

Would a broken catalytic converter cause a car to stop all acceleration responses and i am having tontake my foot off the pedal and downshift then the power kicks back in hard and then goos good again but randomly do it over again (think my catalytic is damaged because my exhaust is rattling at low rpms and at idle itbget a random exhaust rattle

[carbbss]

Does bad cat make rattling sound(just like an engine without engine oil sound) cause i was in montreal and my car made very weird rattling noises just like i mentioned before whenever i go uphill or start moving after a stop the rattling sound was there and also sometimes my low engine fuel light comes on sometimes but next day when i went to my car mechanic he said oil level is normal and the car is not burning any engine oil.

[jakeryan]

Thanks for giving me a reason to go catless

[leticiawingartner]

My engine light went on over a year ago and I did'nt want to deal with it then . I was out of town and it happen in parking lot went to start Vechile and it startrd and it turned off it would turn over and then just turn I regret it now stupid move cost me $500 dollars to have it towed back home.

[buttstinkman]

I had a check engine light on my car, it was scanned for a bad catalytic converter. I don't have any of the severe symptoms other than the light, how bad is the risk to drive halfway across America?