How to diagnose and repair a PO420 on a Nissan Altima

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How to repair a PO420 on a 2006 Nissan Altima with a 2.5 liter engine.You may not have to replace the catalytic converter with this easy repair.
Due to factors beyond the control of jimthecarguy, it cannot guarantee against unauthorized modifications of this information,. jimthecarguy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. jimthecarguy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, chemicals, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of jimthecarguy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not jimthecarguy.

[@josephs9268]

Now this is my kinda guy right here. Fellow honest mechanic here and enjoy seeing other fellow honest mechanics showing ppl we are still around. Great job 👍

[@georgecoleman816]

Great Video of an honest mechanic. I found one over 35 years ago and sent him a lot of business through the years. My assessment - "Finding an honest mechanic is second only to finding a good wife!"

[@johnnysalazar3951]

Great information for those of who do not know Jack........A very honest mechanic. & a gentleman...Five stars!!!. I repaired my P0420 problem.

[@jimthecarguy]

Thanks for watching.

[@damonsims4776]

Honesty gets you further in life. This is a good mechanic right here. 👍👍👍

[@sunilk1204]

Jim - I have the exact problem on my 2011 Nissan Quest. I have the engine noise only while driving. I thought it was a bearing issue since I did not have a check engine light at that time. I got the P0420 code yesterday. I'm going lift up the car and check for the leak. Thank you again for a great video that will save a lots of money to folks who have the same issue.

[@Mr.Africa1]

Honest mechanics are rare nowadays.. You sir, are appreciated

[@johneverett3947]

Well done. I’ve been a emission diagnostic/ smog technician for over 35 years and so many shops don’t know how emission systems actually work!👍👍

[@salvadordlicon9467]

That was a good video and way to go on saving the customer money. Not many mechanics like that anymore.

[@jimthecarguy]

Thank you

[@patrickspencer2246]

Where did you get the gasket from?? I’m having a hard to finding

[@franciscoroman5752]

@@jimthecarguy can this be done on a maxima 2004

[@tysonarroyo7184]

Stephanie Floyd tr t trtg th

[@mississippibilly_]

@@jimthecarguy I have same code but car runs funny at low speed a light jerky feeling no noise

[@NomoOrelSax]

Hard to find an honest, thorough mechanic like this... 👍

[@jimthecarguy]

Thanks 👍

[@LivnTex]

So refreshing to see honest mechanic helping others and not cheat.

[@farmerstanbrand4064]

Great info. It would have been nice to hear it run again after the repair and also see the real time OBD readings. Thank you.

[@mali2640]

Jim seems very honest and trustworthy. I would not hesitate to take my car to him.

[@jimthecarguy]

Thank you for watching. Watch for the next free tool giveaway coming soon.

[@Hippiechic564]

Great video! It’s nice to know that there are still a few honest mechanics such as yourself Jim 👍

[@martinshannon1339]

A class act here , awesome ,HONEST, man well done Jim....

[@robertgliese4831]

wow an honest mechanic great video and thank you jim

[@jimthecarguy]

Thank you for stopping by the shop

[@jimthecarguy]

Thank you for stopping by the shop

[@christianaikido]

HONESTY GOES A LONG WAY....I DOUBT THE GENTLEMAN THAT GOT THE SECOND OPINION WILL NEVER GO BACK TO THE FIRST MECHANIC. ..GOOD NEWS TRAVELS FAST BUT BAD NEWS TRAVELS FASTER...THE DIFFERENCE IS THIS PEOPLE WILL USE THE SAME HONEST MECHANIC. ...OVER AND OVER AND OVER AGAIN! THAT'S A FACT! NICE WORK CAR GUY!!!!! YOU ARE KNOWLEDGEABLE AND WISE!

[@jimthecarguy]

Eloy Garcia thank you for stopping by the shop

[@bernardshelton7349]

Great job Jim thank for your honesty and caring for your customers pockets. 👍🏻

[@waderaffaniello1694]

Honest mechanic rare breed! Thanks I'm gonna check if that's what's wrong with mine

[@ronaldb2829]

10/10 for the service, honesty and type of person! 9/10 for the vid as it would have been nice if you’d power brake it again after the fix

[@TheDisgruntledMechanic]

nice diagnosis and being fair to the customer. Great catch Jim!

[@jimthecarguy]

Thank you for watching and your input Mike

[@Djmouse.otb713]

jimthecarguy what's the name of the kit that you use for the PO420 code.... or what do I ask for at the auto parts store cause my make the same noise and the light came on 2011 Nissan Altima

[@jimthecarguy]

Dj Mouse this was the front donut that was leaking. First make sure that is your problem

[@dk3334]

jimthecarguy will there be smoke coming from that area if that is my problem

[@Terri2fun]

The Disgruntled Mechanic quick silver messenger

[@mistygreen1012]

Samething I just had done on my car today. So thankful my mechanic is honest. I thought for sure it was catalytic converters. Would've cost me thousands of dollars had it been that. It was just a gasket leak same area as here on this video.

[@Longtrailside]

Great work there Jim. Full diagnostics of the problem, and what caused it. I'm sure the parts changers at the last shop didn't listen to the customer about the noise coming from under the hood. Just seen the code and went for the cats. I'm sure the customer is happy also, since they don't have to replace the cats. You earned yourself another long term customer.

[@jimthecarguy]

Thank you for watching and your input.Yes he was very happy.

[@pacheco464]

I got anissan but few days ago starting smelling like rotten eggs but no codes I tink will need a catalitic converter soon what you tink about it !! Tanks you for your time and effort to teach !!

[@wilsonrawlin8547]

Honest seasoned pro mechanic. RARE these days. Subbed and voted, sir.

[@mauricetaplet9382]

Great job! An honest mechanic, that’s a novel idea! I wish you were in the Phoenix AZ area!

[@toroon]

I never thought about the motor mount issue. Good piece of info. Another good one Jim Appreciate the effort.

[@jimthecarguy]

Thank you for stopping into the shop

[@shelea8245]

My Motor were Taken lose during last mechanic issue, Now I Get this code po420 and he want me to replace Converter @$800.. I knew he messed up When he took the Motor Mount Out, damaging the Mounts.

[@rubensoria7457]

YOU A GREAT MECHANIC...

[@frankevega]

Very good information. I think this is what's wrong with my Nissan cube. Thank you.

[@davao0506]

my outlander sounds almost the same,you cant hear nothing when its not moving but when it accelerate noise you can hear with lil ticks,have to bring it to the shop and get it check..nice video,i wish i live close to you..

[@donmayor9729]

we need more mechanics like you

[@redorefurb1422]

Always a pleasure watching your videos, I am having the same code with my vehicle and i am glad to watch your video to get me an idea what I'm dealing with. Thank you so much.

[@joesorrenti6598]

Thank you, because I believe that's the problem with my C-RV, also the motor mounts are probably worn out causing tilt. That was great.

[@jimthecarguy]

Thanks for watching.

[@jessicamonique3013]

was is the problem?

[@fieldsofomagh]

Had a 420 not so long ago that was intermittent.That possibility never dawned on me that joint might leak . Great call Jim !!

[@jimthecarguy]

Thank you for watching and your input.Yes just a little exhaust leak can cause a lot of problems.

[@superduperboyx]

Was that an accidental word play on " 420" and the word "joint?!"

[@jayjacqueline615]

Hey Jim! I wonder if my older 2001 Nissan Altima has the same problem. The "service engine soon" came on last October after I filled the gas tank. Nissan turned it off, believing it was a gas cap issue, but it popped back on again. There are no strange smell or noise, but also no exhaust from the tail pipe. It sticks a little on acceleration, drags uphill, and hiccuped once when I stopped at a traffic light. Just as I am about to park it so I don't blow the engine and I cannot afford to replace the cat, I see your video and remember that Nissan's been suggesting that there's a leak somewhere. I didn't think a leak was that important because there were no puddles underneath and the car seemed to run fine. Even though I'm late to the party, thank you for sharing this new perspective. I'll check it out.

[@user-yq1ys6zj7x]

Great video very informative. I have a 2010 nissan altima 2.5L dealership sales person says I need a new cat conv. Says the whole manifold needs to be replaced they aren't cheap any more. $1200. This cant be actual cost. Pooling my research resources. Any comment by you is appreciated. Thx a bunch!

[@peterbuilt3797]

My '05 350Z has a P400 code: Bank 1 Cat is bad. But, after watching your video, what i saw makes perfect sense. I noticed a nut on the flange of Bank 1 is loose. So, it would be fair to say, this could be my culprit, i hope. Now i know to go and tighten it and see if this works. Thank you sir for an informative video !

[@arcdraw]

Thanks Jim! Always a pleasure learning from you.

[@jimthecarguy]

Thank you for stopping by and your feedback

[@kfneely1]

Wow! I should have watched this first lol! I changed all 3 of my 02’s and the first cat and light still comes on lol! I’ll be checking that gasket next! If it is I’m gonna be mad at myself lol!

[@urielgomez3701]

Well, was it the gasket?

[@kfneely1]

@@urielgomez3701 nope it keep throwing a light after a while . Now my tpms sensor has gone bad so light stays on. Have to replace all four at once smh

[@donjoevillacorta2790]

This man is god of vehicle. He is very intelligent with a pure honest heart. Would love to be friends Wirh this man. Good man very nice kinda mechanic and what every mechanic should.

[@aliver18]

Thanks for the helpful video. I like the Italian accent 🇮🇹

[@rickanderson8088]

This is not only true of Nissan Altima's, any modern car an exhaust leak before the O2 sensors can throw off the O2 sensor readings and cause the engine to run rich (lower mileage) and set erroneous codes for Catalytic Converters or O2 sensors. He is showing the common exhaust leak for the Nissan Altima, which would be different for other vehicles.

[@georgelengu7802]

Very good video, I like iit, very help-full.

[@lewisjenkins5441]

Very good video but we should always wear safety glasses when under a car or using an impact. Thanks again for the great video

[@jimthecarguy]

Thanks for watching.

[@reweydewy]

sounded like a plugged rear catalytic converter. that may be why the donut gasket failed. agree with you about that manifold cat looking cooked

[@jimthecarguy]

Thank you for watching and your input.

[@ChrisHiblerPinball]

Sometimes you love the pivoting head ratchet and sometimes you hate it... :-) Thanks for the vid and the info!

[@LeahMiPop]

Our 2003 Nissan Altima had similar issues. It wasn't making the noise with acceleration, but it did stop accelerating normally. We thought it may be in fail safe mode. Took it to Advance auto and saw the P0420 and P0732 codes pop up. Im researching to find out more before spending too much money. I enjoyed your video.

[@jimthecarguy]

When you try to accelerate does the car feel normal or is there no power?

[@LeahMiPop]

There was really not much power. It would push a little, but very slowly. RPM gauge would go straight to 2,000 and just stay there no matter how much pressure was on the gas pedal. We bit the bullet and took it to a shop that replaced the catalytic converter... It is running and is much better, but still not 100%. Thank you for replying! I was not expecting that!

[@1212LeoSnake]

I am trying to pass emissions on a 2004 ford f150 4.6. Got a p2272 error code. Ran a diagnostics, I was told it's not the cat, no exhaust leak, had the fuel injectors and throttle body cleaned, all o2 sensors replaced, as recommended by a mechanic. Light still comes on. Spent 1000s of $ on guess work. However, the mechanic said he'd fix it once and for all. Anyways, it's a shame how scam shops manipulate people that's trying to do the right thing into spending on unnecessary repairs just so they can continue to keep going back, only to have the problem unresolved. Thank you for videos like this and your insight.

[@gomerpyle1886]

Great job saving the customer money unlike so many crooks. You sound like a New Yorker?

[@sirsweetness8332]

Great diagnosis, everyone wants to change Cats because of the code description. I got taken before on a Lexus cat change, had the code after $1600.00 😈

[@jimthecarguy]

The way I look at it at my shop is if I can save the owner that much money by just checking the car properly i will have a customer for life.

[@ManicMechanic007]

Sure is cheaper than a new cat. Good work Jim.

[@jimthecarguy]

Yea I thought the owner was going to kiss me he was so happy.That would ruin my day.Lol

[@mrvic92154]

Just a hunch the reason that gasket blew out was because the catalytic converter might be so congested and plugged up, the more throttle the more the air needs to flow through a defective plugged up catalytic converter, just by fixing the gasket may cause back pressure into the engine blowing the seals and other components in the engine and causing oil leaks, again it's just a hunch

[@MrTimedd]

Jim this is a great true diagnostic video. Also good form. Being careful and using and tools.

[@AJ-tz6qu]

Great diagnostic skills, keep up the good work .

[@tyronecooke6095]

I just had the same issue. I used a shop vac and a bottle of soapy water to find the leak.

[@platajonathan4764]

I wish I had you as a mechanic here in Las Vegas 😭

[@teofilovega9084]

I forgot to say thanks for the video, the info and for your time

[@jimthecarguy]

Glad to help

[@ralphwood5114]

Put a Japanese import engine in my 06 Altima with 225 k on it. The original engine had worn valve guides. The import engine had a lot of soft carbon probably too many short trips. Getting too many misfire codes. Put two cans of Sea Foam in the gas tank. That fixed the misfire but fouled the converter. I removed the primary O2 senser and sprayed a whole can of Berryman carb cleaner in. That problem went away. I think the misfire problem was being fixed by driving it 50 miles a day on the freeway. I just got impatient.

[@MrTonoRuiz]

Great job with the diagnostic and explanation.

[@gogeorge7]

Well my Lexus dealer said I need a new exhaust manifold. No noise, P0420 could it be I just need a gasket. 2016 RX 170k original owner. Well kept. I like your video.

[@richardsleem1306]

Hi , great video ! Very honest evaluation.. did it work after you installed the new flange on the muffler.. please advise as I having the same code on my 2009 Nissan Altima.. thanks 🙏🏻

[@LDiego]

I have the P0420 on my Titan. Cannot passed emission. Replaced the upstream sensor, and the code still there. Going to check this out, maybe this could be what I’m dealing with, Thanks for sharing

[@BikeStandByMe]

Proper diagnosis is crucial. I worked for Nissan for 20 years and that 2.5l motor was junk.somewhere in that time frame Nissan came and took our newly delivered cars back and put new motors in them due to oil consumption. Others that slipped through fell under a campaign where we would test pressure build up in the engine to insure there wasn’t too much blow by. We also had converts coming apart and going back into to engine destroying the cylinders, smashing spark plugs etc. It’s always a good idea to remove the top sensor and make sure the cat isn’t braking down, very common. Also drop the pipe and look at the bottom for the same issue. I have replaced more motors than I can count for this. Also any misfires will destroy the converter very quickly. Just things to be aware of. Proper diagnosis is crucial.

[@firstvett69]

Hi Jim, 2002 VW Passat 1.8 Turbo. Code P0420. Car has 207.500 Miles Runs Good No Exhaust Leaks. I am Guessing that I have a Vacuum Leak some where on the Engine. I can Not Hear it and have not been able to Feel it at this Point. My next Step Is to Spray some carb Cleaner around to try and locate a Leak. Also thinking at 207 K Miles it just might be that the Cats 9th Life is about over. What do you think. NO this is not Mine Car, I am just trying to Help someone out. Lol. This Guy Lives On a Dirt Road, You should have seen the Air Filter I am sure I got at least a Cup of Sand out of it. Anyway Changed the AF and Fixed one Hose that was Brittle at that Point I wanted to Drive it to see if Maybe the Light would Go Out, well the Battery was Dead so I got a New one. So now the Light Is Out and I have Driven it about 50 Miles and The Light Remains Off. Now what do you Think.

[@bigtd7399]

I have a Nissan marino and its doing the same thing. Thanks if this focus it. Great job man

[@islandbeaches395]

Jim is a good auto tech

[@UGNson]

Hey Jim, Thank you for this honest video. I was wondering where I can find that gasket that you replaced to connect the catalyctic converter pipe?

[@abodao]

Great diagnosis, and helpful tips along the way. Wish you were close by. I have a 03 Camry 2.4L with DTC PO-420 catalytic converter threshold fault. Everyone points to the trailing 02-sensor to clean or replace before thinking about replacing the catalytic converter. Is there anything else I should be looking for. Great tips by the way and Thanks for the video.

[@haywardsautomotive6156]

Pumping out the videos tonight Jim!

[@jimthecarguy]

Actually I made a mistake but putting up 3 in one night.Oh well.Lol

[@nissanneal]

The rear resonator is plugged up. It has a honeycomb in it, but it is not a converter. Need to replace it. That is the cause of exhaust leak while power raking.

[@DjSmoothNY]

Great video and honest catch. I have a car inefficiency code and just today I noticed that a downstream sensor wire is burned from resting on the exhaust pipe. I wonder if that’s what’s caused my catalytic converter code?

[@apostasiaelegcho5612]

If there's an issue with the downstream sensor in the Nissan Altima, it'll throw a cat code, even though the cat isn't the issue.

[@jokekelleey2071]

I think mostly when you get 75,000 miles on a car you have to replace the first O2 sensor upstream because that's what they recommend and you can measure it with the meter

[@jimthecarguy]

There is no recommendation to replace the o2 sensors at 75,000. Your are wrong again.

[@daedaequeen]

I have an 06 Nissan Altima with the same code in the video , I took it to a few shops and some say catalyst converter and other say it may be an o2 sensor, the car can only go to 40mph on flat road but stalls going up hill and makes an funny noise when I try to give it more gas help

[@jakejones5736]

Almost CERTAINLY a clogged cat. My wife had the exact same issue in her car a number of years back. She ended up driving it several hundred miles back home (was out of town when it failed), and could only do about 30 or so on the highway! When I disconnected the exhaust from the cat, it ran like brand new! But when I hooked it back up, it again ran rough, stumbled, and could only drive slow. When they replaced the cat, they showed me that it was totally melted down/clogged.

[@daedaequeen]

Jake Jones yeah I just got mine replaced it runs so much better but a bit loud now 🥴

[@jakejones5736]

@@daedaequeen See? Anyway, I'm now saddled with the infamous 0430 (same as 0420) code on Hyundai Sonata. Checked with reader etc. and cat appears good. So I am gonna try a few things before surrendering to a $1200 cat; DOUBLE that if dealer installs!

[@b57ecv]

its easy to fix and stop the engine management light coming on, it's because the cat is starting to break up and block the exhaust system causing an over rich mixture thats detected by the downstream landa , one of the best ways to fix the engine light problem is to simplify look down the exhaust or up into the manifold and see if it's blocked and running black over rich, if so smash out the blocked cat with a length of steel bar shoved down or up the exhaust system, will mean taking it apart, but you have to be careful not to damage any landa sensors in the process take them out as well if need be, once done disconnect the vehicle's battery to reset the engine management light that's if you don't have a reset tool, once all put back together the management light shouldn't come on and the vehicle will run properly again as an over rich mixture can cause very poor running, to get it through emissions testing next test go become friends with your local garage and bribe them to use another vehicle to stuff the tester up, everybody dose it here in Britain and if you've got the problem you haven't got much to loose by doing this or it's off to the dealership and loose shed loads of money, and the really funny thing is they run better and use less fuel once the cat is gone.

[@sikchopper3783]

Great video. Love the integrity 💯

[@TheGeno2001h]

Thank you sir you saved me a lot of money great video and you are a honest man

[@jimthecarguy]

Thanks for watching.

[@pepemasa]

Sir your awesome , the world needs more honest people like you,. Hey were are you located?

[@tharyonpeakeii1968]

Great video. I am currently experiencing this problem right now and am looking to get my nechanic to do this for me. Would you be able to let me know what parts is it that I exactly need to pick up to hopefully fix this? Thank you in advance.

[@Lance-Stroll]

Put a blower up the cool tail pipe & spray with soapy water to find leaks

[@jazzbone1436]

Great video i got a 2013 Nissan Sentra that had this alarm snd it was a head ache trying to figure out. But thanks for the tips on where to look.

[@pastorramirez5083]

Thank you very much, is an very good video, I always said an honesty person is blesed. Thanks a lot amigo.

[@Killmonize]

I really enjoyed your video. So many different opinions. Anywho i have 2012 honda civic ex 1.8l with. A po420 code. Many say to change the o2 sensors. What should i do? I have 150k on car. Want to make this car last. Seems like you have alot of experience.

[@kenjones2819]

bolts not an issue getting car 6ft high for easy access is lol, good to see machanic do right by their customer.well done

[@julyzerg1]

great video, maybe a little of Loctite Threadlocker and torque it down will prevent them loosen up later.

[@199496db]

I like that approach….thanks

[@TheKobotron]

Thank you sir. You save me a lot money.

[@jamesguralski5156]

My wife's honda ridgeline has same error! Runs fine. I changed all 4 air fuel and o2 sensors! Still there. I was thinking 🤔 the exhaust gaskets

Do you have a part number or a link to buy the part? That is commonly found in the description portion of the video... Thank. Also. great video, Honest work for honest pay. You must sleep well at night!!

[@Rose-mo8qq]

I need this guy. my check engine light had been on for like 3 years

[@jimthecarguy]

Thank you for your input and for watching

[@dohc1067]

Very smooth sir. Very smooth

[@JoseRodriguez-rv5nz]

Long life to you jim so I know how to fix the p0420 in my maxima 02 grasias amigo .

[@jimthecarguy]

Thank you for watching

[@AngeloC49]

Great video brother you got a customer for life for sure 👍🏻👍🏻 was there a bad mount ?? Cheers 🍺🍺

[@jimthecarguy]

Yes he was very happy to say the least.

yes there was a bad mount or yes he was happy. Read your comments fully......feeling that I will never get an answer to my question judging by the responses given to some of the ?s asked. Like just answer whatever.....

[@unclefreddieDied]

Probably in another video

[@tdatilma]

Great video! Thanks for sharing. My 2003 Camry takes a lot of crankings to stay running. It runs for about 3 to 5 seconds, then stops. I have a P0420 . Could this be the reason it takes a lot to stay running? Does anyone know? I was thinking about replacing the sensors. Let me know. Thanks

[@brendaaldridge1246]

Hi I'm Keith nice to meet you my wife has a 2011 2.4 ecotec Chevy equinox Lt and it's throwing code p0420 bank 1 low efficiency and the cheapest catalytic converter kit is 1,800 not including labor where would you recommend to start it doesn't have an donut gasket leak like one fixed on this one and I'm in TN so emotions control is to bad here it runs fantastic going but sometimes when you come to a stop light it will start missing you can put it in neutral and it'll quit some times putting it in park it'll stop you can also put your foot on the throttle while at a stop light and it'll stop or instead of missing it'll just shut off but it'll crank right back and iv replaced both vvt silonode's and both cam position sensors and changed oil when I did the vvt silonode's hope to hear from you soon

[@anthonyiocca5683]

I add a “gallon” of lacquer thinner to between 5-8 gallons of gasoline. Before oil changes is my rule of thumb , to keep the cats cleaner and clog free. I do it the smarter way. I put a 5 gallon can with fresh fuel in the trunk with the gallon of lacquer thinner. Then with between a quarter to half tank I head to the interstate. At a rest stop or before entering the highway I pure that gallon of lacquer thinner into my gas tank with the engine at operating temperature. I drive with the overdrive “off” until the fuel is nearly depleted. I carry the 5 gallon can with me just in case I need it. I have done this a few times now, and I have not needed it. No sputtering, no hesitation with my engine, 4.6L Mustang 2007. All catalytic converters get dirty then they can get clogged. When they get clogged 2 things could happen; 1. The exhaust pressure could blow the clog out of the system. 2. The exhaust pressure blows the clog along with the internal catalyst materials out of the system. Causing a catastrophic failure. Another problem with dirty catalytic converters is “over heating” a cleaner catalytic converter is less likely to “over” heat.

[@jimthecarguy]

I WOULD NEVER RECOMMEND USING LACQUER THINNER TO CLEAN YOU CATS. YOU WILL CAUSE MAJOR DAMAGE TO EVERYTHING ELSE IN THE FUEL SYSTEM. REMEMBER JUST BECAUSE YOU SEE ANOTHER KZbin POST THAT IT WORK .DON'T BELIEVE IT!!!!

[@anthonyiocca5683]

@@jimthecarguy you don’t know as much as I do…

[@anthonyiocca5683]

@@jimthecarguy I just finished cleaning a pair of cats with lacquer thinner. Keep in mind I don’t recommend to mix lacquer thinner in a gas tank then park it. It is always best to run it all out immediately. Never ever add it the day or week before running it out… Got it???

[@jimthecarguy]

@@anthonyiocca5683 Hahaha you are right you must be much smarter. Just keep doing what you’re doing and you’ll find out the hard way. Good luck to you

[@anthonyiocca5683]

@@jimthecarguyThe “easy” wrong -vs- the “hard” right. That is your claim, my claim in this developing situation is; The easy “right” -vs- the harder “wrong” that is more expensive… I have witnessed these emissions equipment and standards evolve since the very beginning in the early 1970’s. Just in case you haven’t noticed, diesel fueled engines now have an emissions system. Diesel engines are dirtier than gas engines. So the diesel manufacturers equip that system with a cleansing fluid that is injected directly into the catalytic converter while in operation (on the road). The diesel emissions system would clog/fail in a very short time if not for that cleansing fluid. Gasoline engines run cleaner than Diesel engines but they are prone to clog/fail in due time. To gain more time with better performance it is advantages to clean (remove the carbon buildup) on the inside of catalytic converters. This “should” be done before a P420 code appears with a check engine “idiot” light. What I understand “your” recommendation is to remove and replace “expensive” dirty catalytic converters. Your justification is weak to charge a costumer an arm or leg for something that is preventable. Preventive maintenance is what I recommend, the proof is the O2 sensor data reported to my scan tool…

[@sherriemedellin5575]

What is this called ,what exactly are you changing out..so I can tell my nephew I have the same code ,changed out the sensor, but I like what your just did ..but I don't know what it's called what you just changed. Thank you.so much

[@jimthecarguy]

The part that I replaced is called an exhaust gasket (Donut)

[@williamrivera6818]

Great job

[@jeffa2063]

Great video Jim! I learned something new 😉

[@JasonSmith-qx3zh]

How in the world this video gets a thumb down is beside me oh he save the customer money that's it !!!!! How dare he you you you real mechanic need to be in everyone community !

[@jesustovar3563]

Could this be the issue without having a check engine light. My 05 explorer sounds exactly like that but I have no light on.

[@wendystevenson2417]

Hi I just watched your video, and I must say I def appreciate your honesty and your old school style. I need to bring my 2008 toyota tacoma to your shop.where are you located? Hopefully near Los angeles,California. Heres my issue. My truck was sitting for almost 2 years in lancaster, ( the desert) windy, raining, extreme heat and then cold at nights.so I kept starting it periodically to keep it in shape.it has 181k miles on it.its the 4cyl 4.0 ext cab. So the engine lite goes on, the Day b4 im taking it to get smogged,per dmv. I have the fixd diagnostic tool,so I plug it in and p0420 comes up. Long story short, 1 shop tells me 750 to replace cad converter, another shop tells me 600$, the fixd tell me it's sensor 2 in bank 1, another shop cleared the engine lite told me to drivev60 miles and come back, I'm at my witts end. Please can you help me not get ripped off and get my truck fixed.please Mr Jim auto guy.thanks so much, wendy