HOW TO CHECK FOR A BAD CATALYTIC CONVERTER BEFORE REPLACING IT

[@MrFakherabbas]

Not exaggerating, I have seen numerous videos on bad catalytic converter , but this by far the BEST. Very clear and concise explanation. Well done 👍

[@ourtruth216]

Honestly almost all his videos are the best! ❤ he’s really good with explaining things in detail. A lot of other ppl forget the list important information.

[@Joerockhead]

I've watched multiple videos of this man, and he's definitely one of the best mechanical teachers on KZbin 👍🏽

[@JoshJecklin]

Best video on bad catalytic converters. Helped me out big time. More views for this king please!

[@johnpaul-xm1cu]

True

[@JesseVigil-c1r]

Your video was the informative video I have watched yet on any subject. Thank you so much. Every issue you mentioned was Right On. Thank you again.

[@HAKAMALAKADEEKYDODA]

Best explanation of a Nbad catalytic converter on KZbin. No bs straight to the point thanks bro

[@billydo5376]

You had made very good and helpful information about the catalytic converters. Thank you for uploading this awesome video

[@shomarinelson6017]

i purchased some high flow cats last yr. and I got a code of p1421. I noticed it was sputtering on my driver side. I just checked under the car today and found out my cat has a small hole in it. I felt the hot air sputtering out of that hole. something told me it was a hole. I went to many auto shops, and they told me it was a relearn procedure that needs to be done. some said I needed to get an update on my ecu. none of that was the issue. I bought some pb weld and fixed it myself for 6 bucks. no more sputtering and the check engine light never came back on. car drives like it was supposed to . now i can get my inspection done . hooray!

[@64arguz]

Excellent explanation, besides that I used my humble scanner and I was able to check: cylinder misfire (6) ok , O2 sensor (4) ok , catalytic 2 ok, catalytic 1 HIGH , max value 3000, reading 3239 , code P0420 , I’m going to try cleaning first before replacing it. Vehicle mileage 140k , my wife bought it brand new this’s the first problem in this vehicle, ‘13 Acura RDX

[@99sflores]

I like how you break it down , excellent!

[@Bwelz2010]

You re such a good Teacher. thanks for sharing.

[@John-zn4lp]

Very good video on diagnosing a catalytic converter. Well spoken and concise.

[@icanexplain6629]

My man i needed this video, thanks i appreciate how easy u made this look

[@favorites51066]

What an amazing video! So comprehensive and easy to understand for your normal person who's not a mechanic. That was very incredible I am subscribing to your channel.

[@LouiseTurner-x9z]

I will be replacing head gasket, O-Ring seals under rocker-arm carriage and catalytic converter on a 1989 Honda Civic. Replaced the oxygen sensor, but that did not improve the problem. Have had some issues with anti-freeze going through the exhaust, so at 146,000 miles on the car, it's time to invest some money and labor into the car.

[@soniarican6275]

Sounds like you have a cracked or blown gasket

[@LouiseTurner-x9z]

@@soniarican6275, Took me around 6 hours to get all of the old gasket material off of the upper block. Tedious job. Things are moving along and hope that the car is up and running before mid-October. Kind of a bummer having 1 car when that car is down.

[@soniarican6275]

@@LouiseTurner-x9z Tell me about it , My car has been in the shop for a while now, it needed a new transmission and now they are telling me both Catalytic Converters might have to get replaced 🤦🏽‍♀️ I’ve been missing so many hours at work it sucks , but yeah changing a gasket isn’t an easy job I hope you can get your car up and running soon

[@gman000]

Thanks for this all the way from CApe Town South Africa

[@BobSmith-tn2qp]

Time for me to share my current experience. I have a 2012 Kia Soul 1.6 GDI The engine seems okay, I have not noticed any power lost, no overheating, no black smoke, no white smoke. I checked the temperature with a lazer gun and it reads 200ish by the exhaust manifold and close to 400F at the end of the catalytic converter, I can't really check the temperature of the catalytic converter because of the heat shield, I will probably remove it and check the temperature 🌡 😑 I don't smell anything under the car, I even put my nose inside the exhaust and didn't smell anything, no antifreeze smell, coolant looks nice and green, oil is clean, it doesn't burn oil, but the check engine light comes on and stays on. I'm going to need to remove the catalytic converter and do a visual inspection, also need to inspect spark plugs and need to check inside each cylinder to see if they have a lot of carbon deposits. GDI is a carbon deposits machine. The OEM catalytic converter cost 1,790 dollars plus tax, plus 3 hour installation, Kia charges 180.00 dollars per hour labor so the total would be about 2,700 after taxes and fees. A local muffler shop can isntall a cheap catalytic converter for 800.00 with a 1 year warranty maybe the cat is at the early stages of failure 100%

[@CLBoxTruck]

Very helpful video,thank you.

[@monty4490]

Great job on this video. I appreciate your thorough explanations and tips.Thank you

[@Alex-rb5fs]

My car is high miles (05 scion xb 230k) low power, black smoke, smelly, p0420. Thanks to your vid, definitely a bad cat. Going to replace it. Do i need to replace my 02 sensors too? Upstream and downstream?

[@kansasgardener5844]

I say no on the sensors. My cat needs replaced also just ordered them from ebay. I did get one downstream sensor but that's just in case I mess one up when replacing the cats.

[@lukenguyen6447]

1st thing: Don't buy cat on ebay, won't work. 2nd thing: Replace the new O2 sensors with the new cat, cost you a bit more, but not painful in the future. 3rd thing: You’ll save a lot of money if you do the two things above.

[@WudULike2MeetUrMaker]

The smell of sulfur sold me , i thought i was trippen smelling rotten eggs from my 06 TaHoe. Thnx for dropping knowledge for the diy at home mechanics

[@keizomatsuzaki]

all the causes have separate error codes. if only p0420, how to find the cause is difficult. but, without knowing the cause, just replacing converter is meaningless.

[@BobSmith-tn2qp]

In most cases is carbon deposits built up. Not cleaning the valves and the intake

[@dramatimefighting]

So does cataclean help?

[@BobSmith-tn2qp]

@dramatimefighting if the cat is burned out, not a chance. It cannot reverse the damage. Cat must be replaced

[@16WRXfa20]

@@BobSmith-tn2qp or possible cat delete?

[@thedirtybubble9613]

Can you still have a bad catalytic converter if no engine light comes on? I smell sulfur from my exhaust.

[@bertings6372]

Would u recommend universal catalytic converters, welded to replace in the old ones?i meant cutting the old one from the assembly and weld on the universal ones? Thank u

[@Riku_DarkWielder]

Will an EPA compliant CAT replacement fix the issue or should i just spend the $800 for a CARB compliant OEM style? My vehicle has been having the CE light come on and off randomly for p0420 for the last year. Tends to come on more frequently when i have more in town driving than highway.

[@allkindadventures]

You break it down beautifully, thanks for sharing.

[@rubenMarquez37]

Thank you for your videos man. You really are something.

[@estelamontilla3170]

No engine light but I have been experiencing most of these symptoms.

[@Anonymous-ns8xe]

Same here.

[@Filam_Prepper]

I have that 42o error code my cat eas stolen while in houston for vacation its normal there i guess most of the hotels dont have camera, any ways question when a shop under my insurance replaced a new one it gave me these errors and accerlating on my tacoma feels sluggish.. noob question can i change the cat myself or do i need special welding tools etc??

[@lewishouston3852]

awesome video! My 2007 acura tl is smoking from the forward portion of the catalytic converter that connects to the exhaust. could is possible be clogged, maybe an o-ring breaking down ?

[@borisjelzin-e6d]

Thanks for your lessons and thanks for sharing ! 👍

[@BrianAlexander-xt6gq]

My G37 sedan had a code p1421 . I've purchased high flow cats from kinetic right after . my check engine light stayed on. It reads as follows. p1421. These cats were brand new but after a while I noticed some rattle when I cold start. It sounded off. Then emissions came around and I still don't know what it could be. The forums say to purchase the cell fix for high flow cats and test pipes. plus, a tune could help. oem cats are way too expensive when it restricts power. The forums also said do not use the cells fix if your cats are bad. I do have a sluggish engine. my mileage is lower than when I purchased the car. I used to have 22.8 mpg now I get like 11.5. car sounds good but I waste gas and I find myself buying more every three days. should i buy the oem cats? should i try the cell or should i just get a new high flow cat and then put the cell on it before the o2

[@jaybrown7088]

2006 rav4 153k miles with lots of short distance trips, recently got P2195 (O2 Sensor Signal Stuck Lean /Bank 1 Sensor 1), after replacing both O2 sensors, maf sensor, spark plugs, fuel injectors, problem still exists, now getting code p0420 catalytic converter low efficiency and p0172 system run rich. Car vibration at stop sign and rotten egg smell detected. Fuel line checked ok, fuel pressure tested within spec, no vacuum leak, no exhaust leak. Is it time for a catalytic converter replacement?

[@hollowtips23]

Duhh

[@Nimibriggs74]

Please what should be the cause of my exhaust manifold red hot thank you.

[@Basheer245]

Awesome video. Extremely useful

[@anthonydefr]

What about its not losing power but you have the code? I put on a high flow cat a few year's ago on a Chevy Impala SS 04. I have 145000 miles.

[@shomarinelson6017]

check the cats . mine had a small hole in it which made that code pop up . listen to your car when you start it with a cold start . listen closely to similar sounds from the cats. if one is off tone then its most likely a small leak . my high flow cats had one and i got a code of p1421. below threshold blah blah blah. got some pb weld and fixed the hole myself for 6 bucks. now my shit purrs like a kitten/.

[@jorgericosax]

I have a 2015 Kia optima 2015 sxl turbo I believe it has 2 converters would I change both ? One by the manifold converter and one further down the pipe ? Thanks

[@chipcode1304]

I have a Traverse 2012, Mileage 212000 with original Engine and transmission. Facing issues with bad mileage and less acceleration. The vehicle struggled on hill climbs and overheated. I already replaced the spark plugs, fuel injector, and throttle body cleaned but, the same issue. Is it a catalatic convertor issue or something else?. your expert opinion is required.

[@thomastom3590]

I think if it overheats it may be you headgasket bro

[@swimwithcoachraven1532]

You answered your question

[@lukenguyen6447]

I pretty sure that's the cat's issue bc I got the same problem. Stealership charged me 3400 for that shit. 2018 Suburban.

[@lawrencehalpin6611]

Thank you. Very good information. Kind regards.

[@Tqueenb]

I have a 2018 Toyota Rav 4' I haven't had it a year yet and it has about 60 thousand miles on it. The catalytic converter was changed by a Toyota dealer since I purchased (that's what they told me). My check engine light came on 2 days ago and the same dealer said the upper catalytic converter was messed up now and it will cost $2500 to repair. Is that true?.

[@Rickie-x2]

It could be an exhaust leak near the sensor or anywhere upstream of the sensor, so I wouldn't just let them throw high dollar parts at it unless you are very wealthy.

[@Tqueenb]

@@Rickie-x2 Thanks! I called Toyota and talked to another representative who asked me to bring the car back in he said ‘i would like to look at this again, that is very very very rare to see cat converters go bad that quickly.?.?.?’ Sooo 🤷🏽

[@motogp9253]

@@Tqueenb While your there file a complaint against that rep that quoted you $2500, they tried to rob you!

[@Tqueenb]

@@motogp9253Thanks!

[@ashleyredden2201]

How do you tell if it's upper for lower converter that's clogged

[@RamxRamx-fw3gm]

I need to to check my truck out. 😊 it’s a 2016 4x4 Tacoma trd sport v6. About 165k engine light is on and a shop found p0420 code. I don’t believe it’s a bad cat I’m sure there are other areas I can check? Thank you guys. Hope I don’t need a new cat.

[@craftingwithnorty4659]

Best explanation, thank you for this video!

[@florenbaron7111]

My 2014 Ford Mustang v6 3.7 is quiet and does not seem to have the listed rating of 305 HP. I am wondering if it can be the catalytic converters. The car drives so quiet. Any ideas? No codes at all. Is there an additive to put in the gas? Thank you.

[@KollynJ]

My manifold precat is measuring 100 deg warmer than the outlet. Is this normal or clogged?

[@rapinncapin123]

Great video From Atl

[@dlwotjs2821]

Altima 5.5 I'm going to ride the 2017 version I'm looking to buy a shoba mount assembly, which brand is good between fcs prt?

[@samueljudah4777]

Very helpful. Thanks and subscribed

[@st0ne559]

My engine wont even start up; i got the 0420 and 0422 codes, so if i replace my cats, should it start back up again? That seems too easy

[@Top5AutoRepairs]

Unlikely unless the catalytic converter was clogged. I have a few videos for no start. Use the search feature.

[@josephyoung8319]

I have a question what if im getting the codes and i just got my spark plugs change but all the lights cut on and the car wheel lock along with the break is that from the converter?

[@Amanlikeme]

Rotten eggs smell can be caused by MAF sensor.

[@carlosmuler4773]

Very interesting and helpful information. Cataclean can work ?

[@Top5AutoRepairs]

I got to give that a try one day!

[@559caliii]

@@Top5AutoRepairsmy catalytic converters are not ready. Only the catalytic converter monitor not ready. I have no check engine light no codes nothing. Any ideas why?

[@KollynJ]

Can u gut my manifold pre cat and still pass smog? I understand it only works while other cats are warming up

[@keithhernandez4319]

my 95 camaro has hesitation after the engine gets warm and then its like i have power loss, i dont have a check engine light nor do i have the smell or over heating. this is on a 3.8 v6 but i suspect its the catalytic converter even though its only 3.5 yrs old because i had a cracked head last year and i had it replaced. what do you think?

[@MariYoungblood-s5m]

I got the code on my 2017 xc 90 T6 will this be the cause of the white/ clear smoke ?

[@hoopalife2434]

PLEASE HELP!! I’m having these problems on my 07 Ford Explorer. I keep getting o2 sensor codes. Even if I have all these problems with the catalytic converter will replacing the o2 sensors solves these issues?

[@asadullah1640]

Very helpful information..🎉

[@אביתר-ס9ז]

Can u clean the converter if its clogged but not broken?

[@jimmytapafini5378]

I have a GLK 350, it smells like gas only on the outside, not inside the cabin. And it feels heavy when acceleration. What could be the problem? I have no check engine light on

[@josetorres4950]

Great video! Thank you

[@mercury760]

I bought a used pickup from the dealership and they told me that it will pass smog inspection but it failed because they catalytic converter was removed by the last owner and I'm stuck making payments on a vehicle I can't drive on the road

[@ilfringilfring6612]

Make them take it back or replace the cat...they lied to you, it didn't pass inspection.

[@BobSmith-tn2qp]

What dealer was this? You should post this on their Google review. You got scammed by that dealership

[@ourtruth216]

So there are laws for buying a used car even if it’s a final sale. If they tampered with any parts to present it was safe to drive when it wasn’t then they have to give you you’re money back. They don’t Have to tell you pre existing issue with the car tho like if the transmission is failing , it is ur responsibility to check everything or bring you’re own mechanic before you guy it. But if they tampered with the dashboard or cleared the codes. Using fake pray to hide corrosion or anything like that you can take them to court. It’s why you should always test drive a car for a couple miles and take it on the freeway before you buy it. Usually if a catalytic converter is missing you can hear it. It is extremely loud! Did you notice an unusual noise at all?

[@yaBoyRome]

A week ago I changed my 02 sensor bank, sensor 1. Also put new spark plugs. Now getting P0420. Im thinking its my 02 sensor on my downstream. I really dont wanna take it in lol for a new cat.

[@Mendeville]

What if there is zero back pressure but temp on upstream is 500ish and downstream is 200ish with a p0420?

[@desitrader7827]

hello, Thanks for the useful video. It has given me a good ideas.

[@marcussmith7789]

i’m not getting none of those code but got the symptoms of low power and i’m getting code po300

[@ashleyredden2201]

Change your plugs p0300 is random cylinder misfire

[@Jimmy-g1x1r]

Thank you for your time

[@JenniferWatkins-fj1de]

Great Job explaining

[@1000ramd]

Curious if anyone has any suggestions about my p0420 code (low efficiency, bank 1). I bought a 2016 Encore, base model with 100k miles on it. I just changed the cat and both o2 censors but the light came back on about 60 miles after the change. Before it came back on I heard a odd humming sound and it felt like it was running a little rough while driving for a few seconds. After letting it cool down I turned the car back on and sprayed the immediate area before and after the cat with soapy water to see if there was a leak but didn't find anything. Any idea what it could be? Thanks.

[@kustomchevy27]

Stop buying American junk GM, Ford. Stick with Japanese Toyota, Honda

[@queenhecate8975]

I’m having this issue with my 2013 kia soul base, bank 1.. front converter. I have around 92k miles on it. I get the code, but from time to time it goes away then comes back then goes away again. I went to Firestone and got a quote for 1850. Replacement 😢. Should I go with them or a discount muffler?.

[@ashleyredden2201]

That's insane pricing

[@AbdulRehman-dd5le]

My dad drives a 2005 toyota previa and the gas cuts off after 2500 rpms it shows check engine light but when checked with mechanics they say it doesnt show any code and tht just weird but what u mentioned in the video tht the car faces problem at signals and loss of power on up hill roads tht happens with me but there is no rotten egg smell or anything im confused as hell help

[@billybobbarker3175]

Fuel pressure regulator

[@10xAds]

Very useful

[@wallyhitch4900]

S10 2.2, will not start, but cranks and hits, but no start, could it be clogged?

[@tarunverma3296]

Hi bro, on my 2019 dodge charger v6 rwd(200,000 kms) , my driver side cat feels like there is a leak, it make a sound more whenever i do cold start after some time I scrolled down under the car i can hear leak puss pusss puss as the car is start running on park ,no engine light. Should i just replace wait for the light to show up?

[@Top5AutoRepairs]

It sounds like you have an exhaust leak

[@curtisgore1611]

Great job! Thank you

[@MrEpsilonZero]

I have 100 degree difference between front and rear of the CAT after driving... Rear is 275 front is 175 is that OK ?

[@SiLenT90723]

No your cat is starting if not already clogged

[@joenico6785]

Ur cat is working fine rear should be hotter than front

[@SiLenT90723]

@@joenico6785 how is that even possible if its clogged itll be hotter up front bu the manifold, like in my case , its 215Farenheit and 115Farenheit in the read side of the cat

[@JcDeal]

What if the code just popped up and now my car won’t start at all when I change the cat will my car start again??!

[@mrvinnie0073]

What did you find out?

[@JcDeal]

@@mrvinnie0073 didn’t work

[@Wavemasterx3_]

I just bought a damn 2003 Honda accord. And my engine light popped up. It has 74.8k miles. So I’m going to try and replace both the spark plugs and the catalytic converter. 😪

[@_olskool]

Same here..3 months later I replaced the engine 😪 now the catalytic converters is smoking like wth ..I was ripped off but I’m gonna try to fix it

[@ashleyredden2201]

Well did ya run codes on it first ?

[@southstar87]

Really helpful video

[@lordsavior6155]

Do you think a bad head gasket could potentially make the catalytic converter to go faulty?

[@Top5AutoRepairs]

Yes it can due to contamination

[@lordsavior6155]

@@Top5AutoRepairs thanks, great videos! Subscribe!

[@Blue_Dutchman]

Very informative!

[@Anonymous-ns8xe]

My Totoya Harrier start off wel but lack power uphill. When excelerating i hear a roaring noise like exhaust is beinf broken or something. I replace oxygen sensor and spark plugs. Need help

[@blass5506]

Is it possible to use a car without a catalytic converter? Would damage the car?

[@Kilinwho]

Would a bad cat stop car from starting? I have a 07 mustang. It’s cranks but won’t start and originally stopped at a light.

[@deathstar562]

mine haves 48,000 miles can it be jus the o2 sensor?

[@Wavemasterx3_]

What did you end up doing?

[@deathstar562]

@@Wavemasterx3_ i took it to dealer after i bought a scanner n they replace the cat n o2 sensor and it went back to normal. Luckily i paid for extended bumper to bumper coverage n they took care of it

[@Rick-yj4nf]

What are the prices on these?

[@vjstewart2907]

Thank you!

[@mfvigilante]

what if p0420 code only came on after installing a cold air intake

[@ashleyredden2201]

Make sure everything is tightened correctly could be sucking air I somehow

[@mfvigilante]

@@ashleyredden2201 I just traded it in for a 2022 challenger lol I didn't wanna deal with it

[@cokermaseryer]

My honda is a 2013 v6 with 185k miles i only get map sensor code and i have replace everything car still no power. Check for ground and now am thinking cat what do u think.?

[@tchekesarecords]

I have a Hyundai Tucson 2006 , and its say Below Threshold

[@A.J.S.529]

Thank you❤

[@original_badgoose]

What if the temps are the same?

[@ShwanB]

Help needed! My 2017 Hyundai Santa Fe 2.0 turbo with only 38k is struggling going uphill. The car is extremely smooth. I checked the fuel pump and replaced the fuel filter although they were clean and fine. I remember two years ago I cleaned the catalytic converter with a cleaning spray product that indeed unclogged it. I was on a trip 3 days ago and found out that the car loses power uphill. I believe it's due to my driving habit. I drive only 5 to 10 miles a day and the car sits all day. No check engine light. Any help is appreciated.

[@Bellathebear777]

Did you get it fixed? I doubt it was the cat.

[@x.livelife2509]

Whats up bro. The mechanic said my catalytic is ok. But! I just replaced 4 o2 sensors, purge valve, ecm, gas cap, Then i got bank 1 and 2 low voltage. Yet theyre new o2 sensors. And now …. P0042 popped up. Please help

[@ashleyredden2201]

Are they OEM sensors sometimes the resistance and the specs from manufacturer sensors are different if you buy aftermarket ones and even if you install them the computer won't even bother reading them

[@thecarfixchannel3046]

Some of what you said is correct but you are mixing issues the catalytic had to be very hot to function correctly and you did not say anything about exhaust leaks /bad o2 sensors codes p0420 and p0430 need to recheck after making sure no exhaust leaks no misfire no lean or rich fuel system the test should bone at cruise speed of 55 mph and look at the rear o2 sensor switch pattern it should switch slow between rich and lean, rotten egg smell can be caused by rich fuel system and hard acceleration so it does not mean bad catalytic converter, rich /lean/misfire or any other conditions will set DTC and they should be check and repaired before testing or even replacing the CATs.

[@futuredefpoet]

Do you have any videos on the subject? I'm having issues with mine.... and you seem to know so much

[@thecarfixchannel3046]

@@futuredefpoet I have one in my shorts videos.

[@MousePirateFilms]

my car has P0240. No smell, no smoke, etc. Its very mystery find why the cause is.

[@awkward_and_existing]

Maybe it's the fuel injector? Just speculating

[@B_HarTz]

Same I have 190k miles, I started at spark plugs and they were bad and def was never replaced by previous owner…. Didn’t work so I changed. Bank 1 02 sensor and worked for about 50 miles then light came back on … I Just changed 1 of 4 o2 sensors so it’s prolly my cat

[@RamxRamx-fw3gm]

I meant I need you to check my truck out haha.

[@dancurrier6421]

I have no codes on my dashboard at all no check engine light on at all n

[@ygbodybuilder3023]

Hey I had the code 40420 show up a couple of days ago and than the check engine light was gone two days later, the next day the p0304 code came on while driving and check engine light was flashing and car seemed like it didn't want to accelerate, cut the car off went to clock in came came back drove around the parking lot with no problem, what could it be

[@Daybyday07]

I have the same problem on my Dodge ram 2008

[@Daybyday07]

Just came from the dealership they said my Cadillac converter is bad. Something with the wire harness and upstream downstream O2 sensors. I changed the upstream O2 sensor already now I need to change both of my Cadillac converters.

[@ashleyredden2201]

​@@Daybyday07try other o2 sensor first

[@LonnieMendezz]

Would it make the shake like someone’s shakes someone’s shoulders

[@junetterenaud1510]

I had a massive oil leak after replacing cats my cats were Turning red it throws a code for 02 sensor but it with replaced I guessing my cats are finished 😢

[@melissabrill8367]

What about p0430? It threw a p0037 code for bank 1 sensor 2 replaced that now getting a p0430 code 😭

[@cqudas]

Thanks