P0420 P0430 Catalyst Efficiency Below Threshold - Testing & Verification

Подписаться 901 тыс.

Просмотров 225 тыс.

50% 1

In this video I show you how I like to identify a failing or failed catalytic converter and then verify the repair once I am finished. -Enjoy!
How Catalytic Converters Work: auto.howstuffworks.com/cataly...
If an SMA Video has helped you out please consider giving using "Patreon" to help support us. The videos take real time to create and pull us away from real work that pays our bills. CLICK HERE: / southmainauto
CHECK OUT OUR "SMA SWAG" STORE! Go on Teespring and get your very own SMA merch!
teespring.com/stores/the-sma-...
If you don't like Patreon feel free to use the "PayPal Me" link: www.paypal.me/SouthMainAuto
The South Main Auto Amazon Store:
www.amazon.com/shop/southmain...
AES Wave Automotive Diagnostic Tools: www.aeswave.com/cart.php?m=af...
Thank you for all the continuing support!
--Eric & Vanessa O.
Feel like sending some swag to SMA because you love the videos but don't know where to send it?
Just ship it here:
South Main Auto Repair
47 S. Main St
PO Box 471
Avoca, NY 14809
Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, 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 .

Авто/Мото

Опубликовано:

30 июл 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 366

@kenadair7463 5 лет назад

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.

@jrodeo96 4 года назад

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

@pocketdimes1048 5 лет назад

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

@NoahWL1 3 года назад

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 5 лет назад

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

@zatoich1st 5 лет назад

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

@terrygaddy7768 5 лет назад

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.

@billymccagh5800 5 лет назад

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

@rhiantaylor3446 5 лет назад

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.

@felixrosa241 5 лет назад

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!!👍🏼🇺🇸

@asapautosolutions 5 лет назад

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.

@primoparadero6609 4 года назад

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.

@mikechiodetti6737 5 лет назад

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!

@Airman.. 5 лет назад

SMA the best YT show

@johnkay8778 3 года назад

bingo bango

@codysautodiagnosticsprogra8706 5 лет назад

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

@dougtexas 5 лет назад

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

@EvanT1995 5 лет назад

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

@Paul1958R 5 лет назад

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

@janpur1417 5 лет назад

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

@SmittySmithsonite 5 лет назад

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. 👍👍

@posae86 5 лет назад

What a badass channel. Good work, sir.

@arthurfricchione8119 5 лет назад

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

@GarthGoldberg 5 лет назад

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.

@alvon911 5 лет назад

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

@bostedtap8399 5 лет назад

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

@baxrok2. 5 лет назад

Great explanation and info. Thanks Dr. O!

@ThePracticalMechanic 5 лет назад

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.

@andyschuldt7580 Год назад

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

@nosefirst 5 лет назад

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

@More350Power 5 лет назад

Great video, always learn something new !

@SouthMainAuto 5 лет назад

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

@Diagnosedan 5 лет назад

Great explanation Eric!💪👍

@fwar83 5 лет назад

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

@stevenvanheel3932 5 лет назад

Time to remove the bulb from the check engine light lol

@JonBoy470 5 лет назад

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.

@bradolson1102 5 лет назад

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

@lonwillis783 5 лет назад

Wow Thank You Eric very informative. Good Job

@joenordine3099 5 лет назад

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

@donnierobertson3088 5 лет назад

Great job again like always

@sambitar8448 3 года назад

sir, direct explanation to the point well explained thanks

@bmaiceman 5 лет назад

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

@AntonioClaudioMichael 5 лет назад

Another great diag video Eric O

@waynehullihen3066 5 лет назад

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

@brianw4brian 5 лет назад

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.

@petemedina8446 5 лет назад

That was a cool video and a very interesting diagnosis👍👍

@BoerGuy 5 лет назад

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

@jamesbruno5896 5 лет назад

Great info thanks Eric!

@mikea4341 5 лет назад

Great info. As always

@fascistpedant758 5 лет назад

Great video. Very useful information. Thanks.

@benjaminstockton3917 5 лет назад

Good video Eric O.

@samrugtiv3839 5 лет назад

Well done Eric

@jdgimpa 5 лет назад

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

@AKJeeper 5 лет назад

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

@richard1835 5 лет назад

Great repair . Thumbs up

@ahill007ny 5 лет назад

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.

@Jay_Dahl 3 года назад

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.

@63256325N 5 лет назад

Thanks for the video.

@IBenZik 5 лет назад

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

@lexusgang2028 Год назад

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

@62ejo 5 лет назад

Thxs Eric great lesson..

@ehsnils 5 лет назад

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.

@BigDog50001 5 лет назад

Perfect example Eric!

@b.r.3232 5 лет назад

Nice! That was a good one.

@Paul-oh4fe 5 лет назад

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 2 года назад

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

@jesusayalaalvarado6561 5 лет назад

good video to check catalystic and diagnostic scanner

@mike-yp1uk 2 года назад

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

@jameswaugh115 2 года назад

Great knowledge

@jerrykirby8250 5 лет назад

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

@slowride55 5 лет назад

Here in Illinois we fix catalytic converters with a sawzall

@FishFind3000 5 лет назад

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

@fredflintstone4715 5 лет назад

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

@FortyTwoAnswerToEverything 5 лет назад

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 5 лет назад

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

@wysetech2000 5 лет назад

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

@cruisepix 5 лет назад

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

@mikephelps8212 5 лет назад

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

@Wildturkey10121 5 лет назад

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!

@aarongrabowski3775 3 года назад

Stoichiometric is just so much fun to say!!!

@konstantinusstoyanov9749 Год назад

Soo pro, thank you

@sdcaraudio1638 3 года назад

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.

@garyr7027 2 года назад

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

@TimPerfetto Год назад

Thank you

@theANGRIERone 5 лет назад

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

@lewisjenkins5441 4 года назад

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

@bentranch1895 Год назад

Thanks!

@spelunkerd 5 лет назад

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.

@ozzstars_cars 5 лет назад

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 5 лет назад

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 5 лет назад

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

@ozzstars_cars 5 лет назад

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

@haywardsautomotive6156 5 лет назад

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

@CubasAutomotive 5 лет назад

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

@woodyglendell7400 5 лет назад

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

@edwardcoluzzi3095 5 лет назад

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

@carlosvelasquez3279 4 года назад

Now you're an awaken Realized Master

@lukegeisler2659 5 лет назад

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

@edgarmaldonado2280 3 года назад

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?

@CTSCAPER 5 лет назад

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

@jonsmith1259 5 лет назад

Would the graphing on the scan device change if the new converter was put on without resetting the ECM?

@TheCowgirlNiamh 5 лет назад

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

@MrVailtown 5 лет назад

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 5 лет назад

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 5 лет назад

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

@martinnorbeck5961 5 лет назад

@@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 5 лет назад

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 5 лет назад

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.

@wyattoneable 5 лет назад

That was good.

@YDVDL 5 лет назад

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

@tonygriffiths2485 5 лет назад

Expensive repair, but got the job done. Wo betide the backfire !

@adamshusta9886 5 лет назад

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

@jasonbranum8117 5 лет назад

"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 5 лет назад

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

@TonyNanni 5 лет назад

Eric, what should the rear 02 sensors read on the Chrysler before it warms up? If it is just sitting at idle will the rear 02's stay high 0.8 v , or will they float down.

@scuba422123 5 лет назад

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 5 лет назад

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

@stanwardoshiro 5 лет назад

Can use a picoscope on looking at the O2 signals instead of live data stream.

@jakewrxdrift 5 лет назад

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

@OfficialNakatsuMegami 5 лет назад

Had a sniff test when I had Cats and it didn't even move the needle on the meter. He thought it was broke. I run E85. After that, I had pipes put through the cats and got an extra 4mpg. Retested and I was still lower than if I used regular gasoline with cats on the car.

@jasonhooey5677 3 года назад

Now if only it didnt cost so much in Canada. All these e85 capable vehicles, no where to buy it. Plus it's crazy expensive

@ronaldclark1178 5 лет назад

Great video as usual! By the way. what brand is your whizzy wheel tool?

@Mike_The_Hog_A_Nator 2 года назад

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.

@odanebarnett3112 3 года назад

I like your video mane Whoo Haaa 👍🙂

@DrinkWhiskeyRaiseHell 4 года назад

Odd I got a P0430 code. I replaced that same cat two years ago with a Eastern. Checked my o2 and upstreams are switching and down stream are steady.

@2olvets443 2 года назад

Hope maybe you an give me an idea on this situation. 08 Altima 2.5L b1s1 shows 2.275v and has little movement. b1s2 .69v pretty steady with the graph all over the place. It’s as if the graph is reversed on what it shows for the 2 sensors. The scan toll is fine checked it’s function on our 5.3L with readings that are normal an the graph show the way it should. Any ideas?

@darktoadone5068 3 года назад

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.