P0420 P0430 Catalyst Efficiency Below Threshold - Testing & Verification

[@asapautosolutions]

Great video as usual. Quick rundown of the OSC test. Get the cats nice and hot. Let the engine idle and slowly add propane until short term fuel trim hits -20, not causing any misfires or stalling. Take the propane away quickly while watching you O2 sensors. With a good catalytic converter, your downstream O2 sensors response will be delayed more than two seconds behind the upstream sensors because the cats are storing the oxygen from the sudden lean condition. Defective catalytic converters won't store O2 and the downstream O2 sensor jump up within two seconds of the upstream. This test works with af ratio sensors also.

[@jrodeo96]

I really appreciate you making these videos. I have watched a ton of them just for general learning and this one is specific to what my truck is doing. It's nice too see how you go out of your way to fully verify the problem instead of just throwing some parts at it and hoping it works. You also show us and explain the diagnostic process so that we can know what we are looking at. The comedy side is a huge bonus. Thank you sir. Now I can go dig into my truck

[@zatoich1st]

Played the game for 40 years (now retired) but good to see a real deal mechanic . Good luck.

[@terrygaddy7768]

Been doing it myself all my life learning the hard and expensive way. Then came SMA / Scanner Danner/ Pine hollow. I're seen the light. "money Light that is". Eric, I owe you brother. I never watch one of your videos and not learn something. This one is a Biggy. Thanks.

[@janpur1417]

Thanks Eric for bringing Chemistry into an Auto repair channel. A catalytic converter consists of two sections: Front- Reduction catalyst (Rh) converts NO and CO into N2 and CO2 as follows: 2NO + 2CO = N2 + 2CO2: Rear - Oxidizing catalyst (Pd, Pt) converts unburnt hydrocarbon (CH2) into CO2 and H2O as well as CO into CO2 as shown below: CH2 + 3/2O2 = CO2 + H2O CO + 1/2O2 = CO2

[@codysautodiagnosticsprogra8706]

Great exclamation on the catalytic converter and how it works but. You’re absolutely right about misfires cool and oil cost on these things to fail prematurely

[@rhiantaylor3446]

Being able to view live o2 sensor data with your scan tool makes the diagnosis look easy but of course, most of us diy types won't have that grade of tool. I have seen a laser pointing temperature gun used to check catalyst viability. Great video, as always.

[@GarthGoldberg]

Aah, you left out the heatin' and beatin'. That's the best part! But at least one less Hemi is putting out smog in Upstate NY.

[@nosefirst]

Well, most things you can do...I cannot. But I still like to watch for general education.

[@mikechiodetti6737]

When I performed road tests to set the monitors for smog testing, I would watch the upstream and downstream 02's to see what the downstream was showing. The vehicles with a higher value, generally .75 to .9 volts, would indicate 02 storage was not great due to age or a repair in the emissions control system. During the smog test, the low speed or 15 miles per hour load test would take longer for the machine to indicate the vehicle passed that test. Vehicles that went through that test quickly were able to have converters that stored oxygen easily. Some vehicles required extended freeway speeds of 65 to 70 which helped to clear the converters. Nice Diagnostic/repair/description!

[@shinymetalobjects]

I realize that this comment is very old, but wouldn't higher voltage at downstream o2 sensor mean the cat was storing oxygen - ie, higher voltage means richer mix, therefore less oxygen coming out of cat?? In this video, the downstream sensors have pretty high voltage, and he says this is good.

[@SmittySmithsonite]

My cat cost me $1,000 too ... at the VET! 🤪 The cats on my cars had some pipe fall through them. Hate when that happens ... Just like when tires fall in the bonfire. Things just happen randomly, without explanation around here ... 😁 Great explanation, Eric - much appreciated. 👍👍

[@felixrosa241]

Well, I just learned something for sure! I've had a P0430 on my 06 Nissan Frontier since 2012 which was just fixed this month. I was under the impression, that the difference in values from the upstream and down stream O2 sensors would trigger fuel delivery changes or the ECU would run in a loop. Much obliged for the informative video Mr. O!!👍🏼🇺🇸

[@ROSS4422]

I used the spark plug anti foulers to space out my downstream O² sensors. It worked.

[@fwar83]

I've had a p0420 for months and my inspection is due next month what a coincidence. Thanks.

[@stevenvanheel3932]

Time to remove the bulb from the check engine light lol

[@JonBoy470]

Depends where you live. In Northern VA, if the money light doesn’t come on when they first start the car, they don’t even bother with the rest of the test and fail the car immediately.

[@sonichedgehog8723]

@@JonBoy470 yep same here we get 30 days to fix a mechanical failure and 60 days for a emissions failure.

[@jdgimpa]

When they were new I worked at a Chrysler Dodge Jeep dealer. We called the Jeep commodes!

[@AKJeeper]

I worked at Jeep/Eagle/Chrysler/Plymouth dealership. I left the dealership world just as the WK/XK Jeeps were showing up in the showrooms. Those Jeeps got nicknames like Commode early on. lol

[@Airman..]

SMA the best YT show

[@johnkay8778]

bingo bango

[@waynehullihen3066]

Just went through this with my 2004 JGC 4.7. Replaced both converters and all 4 o2 sensors.

[@brianw4brian]

Yeah! A bad cat will blow valve guides spakplug tubes right of the cylinder head. Sometimes if car is parked on street while raining the exhaust is like a funnel collecting mud rocks etc.

[@slowride55]

Here in Illinois we fix catalytic converters with a sawzall

[@FishFind3000]

slowride55 what part of Illinois are you at?over here my the city everyone gets tested.

[@fredflintstone4715]

I fixed mine poking rebar through it. No codes yet after several years...

[@FortyTwoAnswerToEverything]

Was a teenager in North Carolina... local exhaust guy replaced the guts of the converter with a straight pipe. Turned out the GM 3.1 V6 would rattle your teeth out without one.

[@theANGRIERone]

Yup. Thankfully out here in Kendall County there's no emissions testing yet.

[@wysetech2000]

slowride55 Then you can enjoy the "service engine" light burning your eyeballs out.

[@pocketdimes1048]

Congrats on 300k subscribers Eric O! So well deserved. By far my favorite KZbin channel. I would much rather watch you than any fake reality car show on TV.

[@cruisepix]

My ears hears Welcome back to Self Made Auto and Cadillac converters! Should have used hearing protection back in the day!

[@mikephelps8212]

Just December viewers, If hive conduce it, you conduce it

[@ehsnils]

One more factor that "eats" catalytic converters is mismatched fuel injectors. The average mix in the exhaust may be on target, but if one is running rich the others are running lean and the waste is combusted in the cat generating unnecessary heat. If one injector is running lean then a valve is also at risk, something I have suffered from once.

[@Jay_Dahl]

I would think that there could be some useful synergy working with other smart techs in a bigger garage, but you prefer to work alone? One of the things we all seem to have learned from the Covid pandemic is how much we need to be with other people. Or maybe with the internet you feel like you're never really working alone? Be careful though, working alone in a shop can be dangerous. In the garage where I work OSHA requires at least two techs in the garage before we can do any work (or so I am told by the boss). Whatever the case, take care - you produce some very interesting content, and you're an asset to the entire auto repair industry. Thumbs up.

[@NoahWL1]

Thank you so much for this video! This is THE best explanation I have ever seen or read on how a catalytic converter affects O2 sensor readings. I've had a vague understanding for a while but I feel very confident reading O2 sensor data now.

[@berlinbadger6725]

SMA come for the automotive expertise stay for the commentary. Another great video thank you Eric!

[@woodyglendell7400]

I could feel my conciouness leaving while you read those Chrysler info and stats.

[@edwardcoluzzi3095]

When you buy any Chrysler product, you've left your brain home

[@carlosvelasquez3279]

Now you're an awaken Realized Master

[@MrVailtown]

Scott Kilmer would of poured a gallon of acetone in the tank n drove it 150 miles. He has a video out on this. Soooooooooooo glad your here ! He's beyond, hmm full of "ideas"

[@bobl78]

I`m currently fighting a clogged converter on my car... the cat is right after the turbo and the O2 is perfectly accessible from under the hood.. since 1 Week I daily remove the O2 1-2 times a day and use a squirt bottle to pour down some acetone, lacquer thinner or DPF cleaner down into the cat...let it soak and drive it... I confirm my efforts by looking inside with an endoscope....after 1 week I have 70-80% of the deposits removed... engine is much more responsive, more power, less knock retard and less consumption.. will continue that for a few days....saved me a cat for now... yes, oil consumption was fixed before, bad PCV valve. as cats are expensive as hell, it´s worth a try to me.. however I do not think that adding anything to the tank heals a clogged converter..acetone will burn to CO2, CO etc like fuel does, how should that clean a converter

[@mikepratali5582]

he also said wash the cat with soap and water too!!! now that will work right? NOT!

[@martinnorbeck5961]

@@bobl78 i very recently put one gallon of Home Depot thinner in a full tank of fuel in a 97 chevy 5.7 which had the codes left and right bank not reaching effiency. Two years ago I did the same thing but only bank one had code. Both times the truck was driven for two or three days and the mil. went out and scanner showed no codes and no pending codes. So scotty kilmers advice actually works and worked twice for me. Nobody wants to fork out the dough for new cats on a 97 pickup with close to 300g on the clock. I dont know where you get your cats but in California they have to have the right numbers on them or they wont pass. Also are more expensive by far compared to the rest of the country. Go figure.

[@bobl78]

interesting... maybe it depends on the type of clogging / poisoning...mine was clogged by engine oil depostits / ash and it did not help.... here during inspection they check for codes and readiness monitors and measure CO level at idle and 3000 rpm ... max is 0.3 % CO

[@jsciarri]

Scotty Kilmer is such a hack and a disgrace to the car community. Lots of brainwashed people watch his channel religiously and actually believe the things he says. The guy doesn't even film videos on actual repairs anymore; all he does now are just pointless "Here's Why" and show and tell type videos.

[@primoparadero6609]

I appreciate your presentation and explanations. I have a 2004 Toyota Sienna with a P0430. I am gathering various insights from explanations. Yours helped me a lot.

[@kenadair7463]

Makes me relive my old Dealership days over. Very good explanation of the diagnosis and follow up. I enjoy all of your videos. I will eventually make my way up to visit your shop, just to say "Hey" and spend some money with you. Keep up the good work.

[@bmaiceman]

I tip my hat the work you do, your attention to detail, in your diagnostic process!! Love your videos, love your channel, I'm hooked!! That having been said however no one has been able to convince me that catalytic converters or actually needed part of the automotive design! To this day I'm a firm believer that the catalytic converters we're created and mandated in order to create an industry! Specifically the mining and oar processing industry. Because it takes such a large amount of oar to get the necessary rare earth metals which are used in the catalytic converters, a great deal of mining and extraction and processing has to take place in order to build a catalytic converters! Whenever I get a car that does not have a downstream oxygen sensor built into the catalytic converter, and I even suspect a damaged plugged clogged catalytic converter, I break out the sawzall and cut that pig off of there, then use some pipe clamps to install a straight pipe in its place!! I've seen a number of vehicles improve their performance, power ratio, MPG, torque, and throttle response by simply cutting out that useless converter and replacing it with a straight pipe!! I've also been known to use a piece of fence rod carod the guts out of a converter and leave the body is an empty shell, another trick is to cut a square panel out of the bottom of the converter in smash all the guts up and let it fall on the ground, then use some steel putty to put the patch panel back over the hole!! I've never experienced engine problems after removing a useless ridiculously expensive an unnecessary catalytic converter from the exhaust

[@dougtexas]

Good explanations. Made it easier to understand what you were expecting, observed, and fixed.

[@bradolson1102]

Ahhhh…. South Main Auto I love it when a plan comes together.....

[@ahill007ny]

Dejavu for me, customer has a 2006 Taurus with the same symptoms and codes from your "Shooting The breeze" video, there was also PO420 as well, graphed the O2 on the Autel and it looks just like what you have on this Commander. The Taurus has California Emissions so you can imagine her reaction when I told her she has to spend another 400.00 for the Cat and all 4 struts are bad. Inspection is due next month.

[@Paul-oh4fe]

I'd like to see you do one of these dealing with wideband upstream o2 sensors and see how you diagnose a p0420/p0430. That or just diagnosing a bad upstream wideband o2.

[@sachsgs2509]

If we knew what's upstream and what's downstream it would be great

[@paulajones3856]

So true, overheating kills the cats quickly. Some makes (especially Subaru) are disgustingly prone to frying cats from misfiring. Don't ignore misfires. With a blinking CEL for a misfire, your instinct may be to put your foot to the floor to attempt a rev tune-up . Big mistake, you're just adding more raw fuel to the hot fire. By the time you find a safe place to pull over and shut down the engine, it's probably too late, cat(s) already fried. It only takes one of these episodes especially when more than one cylinder is misfiring. The blinking CEL light is a good indicator things are going to get expensive if you ignore it.

[@andyschuldt7580]

Great summary. I have the same prob. Was a bad coil/ misfire. Thx for the in depth info.

[@alvon911]

Thank you for reading that explanation. Great reminder of how it functions!

[@darktoadone5068]

I bought a used 2013 GMC Sierra from a young kid and started having trouble and the thing was throwing 5 codes at me, ending up being intake manifold, exhaust leaks and cats, all I could see was big dollar signs. A week later a friend of mine who works for a tow service brought in a totaled 2016 Silverado with only 17,000 miles on it. I got the two cats and stock exhaust for $200!!! It's not what you know but who you know sometimes, I was so lucky.

[@ozzstars_cars]

What in the world? Eric you didn't bust out the 5 gas analyzer like I would have done but I'm still proud of you man. Haha

[@picklerix6162]

You probably need the 5 gas analyzer for an OBD1 vehicle but I guess that analyzer is pretty expensive. When my '94 B3000 failed high NOx at low speed, I went to several mechanics and asked them if they owned a 5 gas analyzer and all of them laughed. Also, I found out that most mechanics where I live are merely parts changers and are not competent at fixing emissions issues on OBD1 or OBD2 vehicles. For a NOx issue, most mechanics will try to replace your oxygen sensors, the catalytic converter, and the mass air flow sensor. Since the truck was over 20 years old, I replaced the oxygen sensors myself and an "emissions" mechanic replaced the mass air flow sensor and the mechanic got my truck to pass the NOx test by racing the engine and feathering the clutch on the dyno. The following year, the truck failed high NOx again so I decided to fix it myself. After doing some research, I found that several things can cause high NOx in a vehicle including engine overheating (leaking hoses and/or leaking radiator), manifold leaks, and leaks in the air intake system. After inspecting the plastic air intake snorkel tube that is connected to the throttle body, I could see that heat from the throttle body had degraded the plastic tube and I found a rather large hole on the bottom of the tube. After I patched the hole in the air intake tube, the truck passed the low speed NOx test with flying colors. BTW, the mechanic also wanted to change the EGR valve but, surprise, there's no EGR valve on my truck. I found that out when somebody recommended that I clean the EGR valve.

[@haywardsautomotive6156]

Not everyone buys a 5-Gas Analyzer to check their farts Glen 😎

[@ozzstars_cars]

@@haywardsautomotive6156the human nose is very accurate. The hydrocarbon numbers around my house are off the charts! 🤣

[@haywardsautomotive6156]

@@ozzstars_cars It lets you know how flammable they are...heard it from a friend 🤣

[@CubasAutomotive]

Gotta love the guys for their banter.. lol! Just too funny! 😂😂

[@ThePracticalMechanic]

Great info once again Eric O. Those Commanders have that Hemi crammed in there. I really dislike broken manifold bolts on the grand Cherokees with the Hemi.

[@adamshusta9886]

Wait no lacquer thinner. But Scotty Kilmer says..😂🤣😂🤣. Good information here. I enjoyed the video!!

[@billymccagh5800]

Hi Eric and family have been away for awhile nice to see you doing a great job as usual.

[@CTSCAPER]

Do you go OEM or aftermarket for catalytic converters? If aftermarket do you have a preferred brand?

[@Mike_The_Hog_A_Nator]

I have an 02' Blazer zr2 4.3, no codes, check engine light, etc. One day it just lost power bad! Hard shifting, high revs, etc. I honestly thought it was my new HD Tranny I had installed (4L80E) But, the Cat was plugged! 3 mechanic shops with $5k scanning tools couldn't figure it out! Stupid.. I took it to a recommended shop & that Ole mechanic knew immediately what it was. Changed it out with a $120 high flow Flowmaster Cat & 300 miles later? My Check engine light came on last week. P0420- "Bank 1 Temp Below Threshold." Changed the 02 Sensor & the light w/ Same code came back on! Bought the #2 02 Sensor & just installed that 1. It's always ran damn great. Even with this code. You can't tell it's running at a red light with the AC on. I did check with a scan tool & everything is showing correctly. Fuel trims, bank 1 & 2 02 Sensors. So we'll see. The only issue was, I was getting 7mpg!! However, she runs great & fuel trims showed good when I was getting 7mpg. I was getting 14mpg. I'm doing more idling out back on my ranch than I do on the highway. So that could be 1 reason my fuel mileage is crap. No harsh fuel smells from tail pipe. Clean as can be.

[@BigDog50001]

Perfect example Eric!

[@Paul1958R]

Eric, Another great video - thank you! Great explanation of the system operation and code setting criteria. SMA#1 God bless Paul

[@MaintenanceMan00]

Nice informative video Eric. Thanks as always for the hard work.

[@posae86]

What a badass channel. Good work, sir.

[@sdcaraudio1638]

excellent diagnosing. I just aquired a Jeep Liberty 3.7 with p0430 and everybody else threw 02 sensors at me to replace. Didnt fix it.

[@aarongrabowski3775]

Stoichiometric is just so much fun to say!!!

[@spelunkerd]

Eric, can you throw us a bone by remembering to tell us which scanner you're using when you boot it up? The brightness of the screen often makes seeing any logo on the side of the tool difficult. I see this one is the Bosch, but only after we got a look at 8:00. Brilliant summary, by the way.

[@IBenZik]

Pain in the... You have a Hoo Ha. Great vid!

[@corryarbuckle1314]

I replaced the cat on my ´99 4cyl man S10 on Sunday. I knew it was bad because some weeks ago a rattling sound started emanating from the cat, eventually morphing into a drone as if a muffler was bad. I noticed a loss in power. I measured fuel economy and it was 22.4 mpg, pretty close to normal--I think. Did not throw a code! Got a new cat from 'Napper' ~$200, they promised it would not throw a code--it has not. Did not fire up my generic Autotap, not sure if it shows O2 wave forms (think it does). I looked into the old cat and saw three large 'lumps' of light grey fireplace rocks (best way I can describe it). The new cat had the expected square grid. Somehow the grid degenerates into lumps, stratified lumps. Bottom line: I'm not sure what to make of no code thrown.

[@frugalprepper]

Theres a bell ringing guy that has a great video on cleaning your cat

[@JMassengill]

In my youth, I baptized a lot of cats and I can tell you they don't much like it.

[@frugalprepper]

@@JMassengill Yeah but you have to do it in Acetone! That keeps them from whining about it!

[@JMassengill]

@@frugalprepper AH! the foolishness of youth. I never knew that!

[@SouthMainAuto]

How Catalytic Converters Work: auto.howstuffworks.com/catalytic-converter.htm ** www.amazon.com/shop/southmainautorepairavoca **

[@BoerGuy]

Great repair! Enjoyed the diagnostic process learned lots about Cats. I did miss the Heat & Beat though. Keep up the great work!

[@jasonbranum8117]

"And they write" how i miss what's up Wednesday! Awesome video I'm having the same issue with my 98 caravan with the "big" 3.3liter lol

[@j.cooper2246]

Whats up wensday is only from January to april...eric says way to buzy to do year around..

[@jesusayalaalvarado6561]

good video to check catalystic and diagnostic scanner

[@d.l.horton2093]

I was unsubbed. You are the only guy working on Jeeps without crazy tunes involved. I would not have unsubbed from that content.

[@lexusgang2028]

Great video man i get it so much more now I wouldn't have figured that out

[@AntonioClaudioMichael]

Another great diag video Eric O

[@lukegeisler2659]

What’s your experience/ results with using an infrared thermometer to diag a bad cat?

[@sambitar8448]

sir, direct explanation to the point well explained thanks

[@nsaglian]

Melting point of Pd (Palladium) is 2,831°F. Steel melts at approx 2500°F.

[@williegillie5712]

platinum, palladium, and rhodium, I think are all the precious metals found in the catalyst.

[@arthurfricchione8119]

Thanks for the video Eric O. Lots of useful information as always.Thanks much❤️️

[@richvandervoort2950]

What's your experience with durability of aftermarket catalyst ?

[@scuba422123]

good info eric! if that was a oem cat its fixed like forever you forgot the tec tip about the plug antifouler or the resistor

[@throttlebottle5906]

those are tampering devices.... ugly fines ;) not that I wouldn't in the "backyard"

[@samrugtiv3839]

Well done Eric

[@benjaminstockton3917]

Good video Eric O.

[@edgarmaldonado2280]

Hey Eric, firstly I'm a huge fan of yours. You are the perfect example of a true mechanic. Secondly, my son has a 2003 Honda Accord EX and there were no check engine lights on.. The intake manifold house was cracked so I replaced. The next day the check engine light came on and the code is p0430. I don't know if I messed up the hose putting it on cuz I was rough, but can a intake manifold hose be a reason for the code p0430 coming on or is it a coincidence?

[@bostedtap8399]

Very interesting and useful info. Thanks for sharing and best regards from the UK.

[@jakewrxdrift]

Hey Eric. I'm pretty sure the Autel has Catalyst replace function.

[@theANGRIERone]

The passenger side on my 99 Sierra with the 5.3 does this, too. Suspected it was either the rear O2 or the converter crapping out since I don't get a CEL. Yet. Lol

[@Diagnosedan]

Great explanation Eric!💪👍

[@tonymonastiere8510]

We've come a long way from...plugs, points and condenser. I liked the easy days.

[@lonwillis783]

Wow Thank You Eric very informative. Good Job

[@baxrok2.]

Great explanation and info. Thanks Dr. O!

[@Wildturkey10121]

I don't know about anyone else but I miss the frequent longer videos, I understand this is a busy time of year and it is hard for you to make the longer vids, I can't wait for their return!

[@TheCowgirlNiamh]

I bet those cats cost a pretty penny! Nice job Eric! 👍☺️

[@More350Power]

Great video, always learn something new !

[@throttlebottle5906]

ruh-roh-raggy,,,, I feel someone's pocket book and bank account emptying out :))

[@donnierobertson3088]

Great job again like always

[@joenordine3099]

I love the vids. I get excited for new ones lol.

[@martinjones849]

You must be earning a fortune to afford Bosch diagnostics here in the UK the updates alone are really expensive!

[@Maxxarcade]

I have this code on my 2011 Tahoe. Probably gonna cost a ton to fix knowing my luck.

[@mike-yp1uk]

It's so cool when you find documentation as to the criteria for setting the 420 code. It really made this video worth watching twice. Great job. I bet Mrs. O had to look it up. Lol

[@alexandermartincausey7333]

Heads and now cats? Jeep living up to it's reputation - Just Empty Every Pocket.

[@blackiechong4344]

I never had any problems with a jeep. GM always something to fix, Dodge a gamble if it needs fixing or replaceing. Ford mechanics nightmare.

[@jerrykirby8250]

Great video Eric but I'm listening to you over my Bluetooth in my 200 and I keep looking at my dash everytime I hear that chime lmao

[@justsumguy2u]

I'm so glad we don't have vehicle inspections here in Florida. When the money light comes on, I'll always fix whatever's wrong....unless it's for an efficiency code. My current car has had one for 3 years now....I'm not a tree hugger, I don't care if the converter has lost efficiency

[@dwoodog]

well I've watched enough of these car repair channels to realize you either buy a scan tool or a parts canon.

[@63256325N]

Thanks for the video.

[@lewisjenkins5441]

Your videos are so nice and provide us with so much information. I have watched many of them. I have a question I was hoping someone would see this and be able to answer. I have a 2004 Nissan Sentra with the 1.8 engine. It has around 150k on it and my wife uses it every day. I have a persistent P0011 code, which is something about the timing to far advanced. This has been going on for about 3 years. I had it to the dealer and they told me it needed a timing chain. And they "have seen this problem before but not in no 150k" of course they wanted a fortune to fix it and I told them no. I have a friend I know that has been working on cars for years at house and he told me to order a Nissan chain and gears and a tensioner and he would do the work for me. He did the work and it is running like it did when it was new. However this code keeps coming back. He said to use Nissan cam and crank sensors and I have done that too. I ordered the factory parts off e bay. The car had cheap sensors in it from auto zone. Is there anything else I can check? What else can cause this issue? It doesn't use one drop of oil either and this car fits my wife so well and she loves it. She is a nurse who travels around the county to her patients homes to help them. Any ideas anyone? thank you so much Carl Jenkins

[@dondesnoo1771]

Had an aries head gasket fail .cut a triangle hole at inlet top gave it a d&c with a chisel put backwards blew out junk put back on passed inspection 5 more yrs.😁 Was a 200$ sta wagon got 40mpg . neighbor had Prius 45mpg 29k$.

[@garyr7027]

Eatin antifreeze and oil like it was its job... Lol. Good one 😂

[@asymptoticsingularity9281]

2 spark plug anti foul bushings will repair the catalytic converter, right?

[@throttlebottle5906]

lol

[@meanmechanic9]

Won't repair the cat but will get rid of the code. I did it after having my my replaced cat cease to function. Remember, the spark plug anti foul bushings is not the correct way to "fix" a bad cat. (wink, wink)

[@mrau92me]

From where did you get the new cats?

[@jameswaugh115]

Great knowledge

[@YDVDL]

I have seen oxygen fouler put in on downstreams helped and resolved p0420 p0430 code issue right away...

[@SparkyWrench]

Great video

[@JohnSRosamond]

Sounds like it was an expensive repair with 2 cats on the line.

[@MiamiZombie2012]

One of the very few things I like about dirty Jersey, the 25 year rule. Goodbye cats.

[@petebach7221]

Classic Volvo same rule applies in Washington State. My ‘94 suburban just passed the point of testing.

[@MiamiZombie2012]

@@petebach7221 Isn't it nice not having to buy an expensive cat anymore.