Top 10 Symptoms of a Bad Catalytic Converter | How to Tell if it's BAD

In this Video we're going to learn the common symptoms of a malfunctioning catalytic converter. So if you suspect that your catalytic converter is going bad and you're still unsure about it, then this video will surely help you.

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#SymptomsOfABadCatalyticConverter #CatalyticConverterIssues #CatalyticConverterProblems #HowToTellABadCAT #CatalyticConverterReplacement #CatalyticConverterDiagnostics

[JEETERSKISSJeeterskiss-yuhw]

THIS VIDEO WAS INFORMATIVE AND SIMPLIFIED. THANKS.

[marsm.]

Also not necessarily a cause of a catalytic being bad but a p0420 code is a faulty reading from an O2 sensor due to an exhaust leak. I’m gonna find out about mine soon as my flex pipe on my accord v6 is leaking and the p0420 (bank 1 - rear cat) is on.

Also for those who are buying v6’s, always remember your car will be expensive if this code comes up as a v6 has 3 cats

[PeaceNinja]

I have a P0420 code (low catalytic efficiency) on my 03 Honda civic. I used to have a P1457 code (emission EVAP leak) but that just disappeared. Now it’s just P0420

My symptoms:
After running my car for a while, turn it off, go to the store or something, come back and turn it on, after about 30 seconds, the RPMs will stumble .. almost like it wants to stall out and then it’ll accelerate itself and stabilize.
Now that the video mentions it, I am hearing rattling 🤔
I also have strong gasoline smell inside and around car.

On a scale of 1-10, how likely could this be a bad cat?
I just recently had an engine swap, spent lots of $$ already 😭

[LOLONO]

how to tell if this is the rear or the front one ? downstream or upstream

[karenroyal]

The only symptom, I have our codes being thrown and engine light on could still be my catalytic converter?

[ResEvilJr]

can the manifold pipes
get cherry red?

[memolocs]

P0137, p0141, p2187, p2196 and check engine are on my dash. I replaced the o2 sensor since it was burned already bad. And now the cars rpm moves between 2 and 3 when the car is cold and i turn it on. It goes away after i put it on gear. I hope is a vacum leak and not the cat since i have a 2016 maserati ghibli. Only 14k miles btw. Wtf can it be?? 😅😅😅😅

[HalifaxHercules]

In the case of Mazda CX-3, bad catalytic converters can also cause a driver side floor to get a little hot.

It happened to me recently, and I'm now in the process of getting it replaced.

[islandbeaches]

Replace the entire exhaust from the muffler to the exhaust manifold.

[youngrenzy]

They stole mine the shop wanted $1800 I took off and went got a straight pipe for $150 runs fine with 247, 000 miles

[AreWeThereYet-]

Diesel fuel pump handles are identified by the color green, Apparently the creator of this video isn't a mechanic.

[tagminda]

they delete someone's cat but every year he pass emission test. cat is just business.

[ClandestineRider]

Looks like its a cat delete and cut out install time. I live in an agricultural county, so emissions don't matter