CHEAP Catalytic Converter Fix - P0420 P0430
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- Опубликовано: 8 фев 2025
- This video will show you how to fix a seemingly fine catalytic converters (FOR OFF-ROAD ENVIRONMENTS ONLY) so that your check engine light turns off.
IF YOU DRIVE YOUR VEHICLE ON THE STREET AT ALL…THIS MODIFICATION CAN AND WILL RESULT IN FINES. This is ONLY FOR OFFROAD RACE CARS ONLY THAT DO NOT REQUIRE EMISSIONS INSPECTION OR COMPLIANCE.
USING THIS IN YOUR STREET DRIVEN VEHICLE IS ILLEGAL.
The Offroad benefit to this is allowing the check engine light to come on and notify you of problems instead of thinking your engine is fine. If you have a light on a performance OFFROAD ONLY vehicle for this, then you won’t know when your engine throws other codes.
**THIS IS FOR OFFROAD RECREATIONAL USE ONLY. ALWAYS FOLLOW ALL LAWS, REGULATIONS, AND STANDARDS. ESPECIALLY EPA STANDARDS**
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The straight ones that are really just sparkplug defilers that you drill out to fit your O2 sensor do work and very well I may add.
You can correct for that and also a tired O2 sensor with a potentiometer to vary the signal voltage. Mechanics have and exhaust gas analyzer to make sure you got it right. Also, if your cat is tired, you can remove the spark lead (safely) to one cyclinder and the unburned fuel will make the cat go red or even yellow hot. Red is enough - about 5-10 minutes. But have a fire extinguisher handly. It cleans up the cat without any expensive chemicals. On a gasoline engine.
That’s a big tip!
Where is the spark lead do u have a video doing it ?
I have a bad cat my tester says low efficiency the truck runs fine but the check engine light is on
I'm tempted to try either the extension or do what you describe
@@MartinCiprez-l1b Ok, check wiring first and circuit carefully if you do the potentiometer. On mine, it was a 5 wire sensor, turning to 6 wires at the harness. It had an internal laser-trimmed resistor looped in. It was exactly 116 Ohms. So I used one branch of the potentiometer as just a variable resistor. 120 ohms made my engine run rich. It needs to be really precise. But the heating method can be a quick and dirty way. But be safe pls.
I love it, you just saved my day,my wife wants drive a vehicle with the check engine light on and it just threw it on due to catalytic converter and it still runs great with plenty of power! Will be ordering a 90° spacer tomorrow
How’d it go?
did it pass ? they do a visual insp on o2 sensors ???
If you find a link to buy please post it here! Thanks
😂 Straight, 45 and 90, some $10-20 stainless or iron steel
Spark plug anti fouler and a 1/2” drill bit work as well. They’re at all major auto parts stores on the shelf.
Hey I did this on my car, it worked!!! Of course I only use my car off road😉
Bingo.
Where did you buy it?
Same here,off road only
Where did you get it
@@garymartin8619off road😂
I just used 2 spark plug anti-fouling extenders and it worked great
Did you jack your car up to do that
But didn't you have to drill hole bigger
@@reginaldlarry2962 i did for 1 of them
The front sensor is for monitoring air /fuel ratio and controls fuel management
Yup. The computer also takes that info for emissions. But it also does that. 100%
Can you post a link to where you got those extenders do you think a person could possibly make one themselves
Tried the straight before Dan, no joy. Never even knew these existed, thank you so much brother!! Have a great thanksgiving!
I’m glad you saw the video and glad it will help! Happy Thanksgiving! Enjoy it!
@@WarPaintOffroadgreat video this gives me hope I'm just wondering like many others of where can we get those curve type of spacers thanks
I used the straight double stack parts store defouler method on my 98 chevy. Worked great. Drill one out for the o2 then stack it on the unmodified one with the small orfice on the end, then screw the assembly in the exhaust
Exactly what I did, 09 Dodge Journey
This worked on several of mine.
My car was driving terribly, replaced the upper cat myself. Car drives like new. Total cost: $242.88
Can you change mine
Tf you get a cat at for 240
Hello yeah 👍 come do mine please I only live in Modesto, California😂
Since you have experience on getting on Cadillac converters can you come in do mine😂😂
@@KeilanJones-eg4edthe neighbor
IT WORKED!!!! It friggin worked!!!! I had to go back and find your video and tell you thank you this SH%* worked🎉🎉🎉 Dont forget the blow out part but baby it WORKED❤❤❤
Woohoo!
Where did you buy the extender from?
@randallwillis8286 I heard walmart sales them
What is the blow out part? Just debris? Let it run a bit before adding the sensor? Where did you order it and was it just plug and play?
Where. Did you get the? Spacer from
The straight spacers work fine if you put a piece of stainless steel wool in them. Don't pack it tight. Just a pinch of it is all that's needed.
Interesting. I’ll have to test that out one day.
It's not looking for dirty air it's looking for oxygen. In reality your J pipe creates a venturi effect as the exhaust gases pass by the opening so the sensor will never see anything as the tube will have a vacuum in it. Good idea I just don't think you have a full understanding of how and why it works. Thanks for making this video.
Bingo
I'm interested .
Where do you get those 90° spacers thanks
Thanks for explaining how they work. I had been trying to google that, and been trying to find the explaination. Makes sense why the elbow version works better now.
I'm here, for the catalytic converter info, and didn't realize you did the 4X4 upgrades etc. I do have a Ford F150 4X4, but it sees little use in the back country these days. It's still all OEM, and I've always owned an ATV for back country jaunts, to myself living here in the Pacific Northwest of Canada, but have travelled to Utah to the many off-road locations, and have seen some awesome scenery in doing so obviously.
Fantastic! Super cool.
What a great explanation! You just got yourself a like and sub!
Thank you so much for sharing your expertise and for doing it for free! WOW! You're a super guy! I'm DEF watching your vids! I'll let you know if it works for me.
On Nissan, if you drill out the tip of an anti-fouler plug so the rear 02 sensor will be pulled out of the main exhaust, it tricks the pcm into believing the cat is working
Interesting.
Did you use 2 or one non foulers?
This guy should be an engineer at dodge ❤😂 ,
What do you think about those rislone , cataclean ....etc products ?
Good job
I'm trying the straight one but I put two tougher see what happens if it doesn't work I will change to this one, thank you great video.
I don’t it just depends on the vehicle and the condition of the cat. Sometimes they’ll work, sometimes they won’t. If the cat is clogged enough…it won’t matter.
Did the straight ones work?
@@WarPaintOffroadwhere do you get the pipe from
Was down a rabbit hole not being able to get rid of a P0420 on my 2011 JK Wrangler. Ended up replacing the bank 1 O2 sensors with a Chinese brand off Amazon thinking that would fix it - NOPE! ... tested replacement o2 sensors and they were giving off too 6 ohms across heater element. CEL's for "high-voltage" persisted (NTK & Mopars give off 3.5 ohms).
Almost bought new Catalytic convertors (also tried cleaning the cats & even using the spark plug non-fouler trick but CEL's persisted due to cheapo O2 sensors - non-foulers will not work if your cheap sensors are sending incorrect voltages to the PCM). After much research, discovered the JK is super sensitive to o2 sensors. Ended up buying the NTK brand and they worked perfectly. DO NOT USE ANY OTHER o2 SENSOR on a JK than NTK or MOPAR (Bosch is too sensitive and will trigger CEL's). NTK website has a part lookup function (note: upstream and downstream are different part numbers). NTK are more expensive but TOTALLY worth it. Cheap sensors are not worth the hassle.
Another key tip: O2 sockets are not meant to "break loose" difficult sensors - the wrench (link below), with a hammer, worked perfectly for breaking loose the sensor (after broken loose, then you can use the slotted sensor socket). Also, use PB blaster the night before. Note: Always use a thread chaser & high-temp anti-seize before inserting new sensor www.amazon.com/gp/product/B00I6TBHE0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
Had one of the first TJ duel CAT (WTF jeep ) drilled a small hole in it to keep it running luckily it was still under warranty.
How you doing sir I was wondering if you can tell me where I can buy that extension the one you were saying the
i used cataclean in my 1998 mb with 250,000 mi. it worked.
Thats a better extender for sure. According to the theory the longer the extender the better. Also, If you drill a small hole at the end of the extender the venturi effect will suck in cool air and dilute the exhaust further.
Great tip!
surely it would detect too much O2 then
Bad advice.. the downstream O2 sensors job is to detect O2, not "dirty air".. drilling a hole to dilute the exhaust stream introduces more oxygen into the system putting you right back where you started.
You have touched on literally every issue I’ve ever had on my jku 😂
Hah. That’s too funny! Just trying to pay it forward and keep the channel growing!
It's because it's the few issues jks get.
@@callmesomething1425 some are certainly more common than others. But this isn’t a jk issues. This is on every vehicle made with cats. We just lucky that some of us use Jeeps offroad only making it okay to do this.
My man thx for the info. Mechanic wants $1630 for catalytic converter and $250 for labor. Jeep is 2012 unlimited sport wrangler with 100,354 miles.
Kind of nuts. This doesn’t always work on every vehicle…but hopefully it does for you. They got super smart with the tubing on more recent vehicles and it won’t throw a cat code but it will throw a “slow to respond code”. Meaning the time it takes the second sensor to respond like the first one on deceleration is too long. They are trying hard to eliminate the work arounds. But on lots of vehicles this works.
@@WarPaintOffroad ❤❤❤❤😊¹😊ààa
Glad I saw this 😄 Firestone tried to take me for a $2159 ride that was O2 sensors included. I knew something was fishy when they charged 200 apiece for those plus $100 labor bringing them to $500. I can put those on myself. Hell if it's bolt on/ screw on I will give it a shot.
@@sarahshear5132❤
Change the coolant temp sensor to avoid losing half the new cats lifespan in 800 miles.. not troubled in 30yrs?? New car 30 years pollution at buy! 600$ commission on cat sale?
California will no longer pass a car that has the extenders. Yeah, the sparkplug fouler with a hole drilled in it works. But now the smog inspection has checking for extenders as part of the inspection and will fail a car that has one.
Yea. There are a couple states that I believe inspect this way. But I honestly was truly meaning this for Offroad vehicles. I was joking about it in the video regarding clean air for the neighbor you hate, etc. but I did truly mean for it to be for Offroad use.
Yes they are. I tried CataClean & Sea Foam, but cat was gone. $561 for Wagner Cat w/ exhaust & accessories, $210 for both O2 sensors & $300 labor. It's cool, passed smog & the guy at the smog place said u have a brand new car basically. After head gasket, timing chain, water pump, thermostat, radiator & new hoses. 185K
Very well said. Thank you sir.
I just bought a 2010 Accord ex-l 2.4. During the test drive there was no check engine lights, of course Now there is, the owner stated it had the same gas in the tank for perhaps 6 months, could old/bad gas cause p0420?
Bad gas can cause all sorts of things. Start with fresh gas and a fuel system cleaner to be sure.
Thanks, Starting with the Lucus high mileage.@@WarPaintOffroad
Excellent explanation and seems like a solid hack 👍🏽
My trailblazer 2005 says that about unefficient cat. But runs good. No cloggage. I guess I need to work on the last sensor
Did it, used dish soap abd itvworked, thanx a bunch ! 🤗
Where do you purchase this product or the two piece unit mentioned?
Summit Racing. Vibrant Performance J-Style Oxygen Sensor Fittings 19019
Thanks for your tips
You said ALL cars have 2 O2 sensors well mine doesnt it has 1 on a 86 ford ranger 2.9 L v6
Answered all of the questions I had. Thanks a bunch.
Hope it helps!
I am just learning to fix my 2001 ford expedition 5.4l 4x4. My friend and I had to replace the plugs and coils when another mechanic left my truck tore apart tools thrown in yard. Took it to OReillys and they put on the scanner but there was no code for the cat. We really think its the cat can we take it off and clean it? I really need my truck to run better so I can find a job. I can not afford any more mechanics just taking my money and not fixing the problem . I put a new battery and it started right up but had to drive with both feet because if I would take my foot off the gas it wants to die. Putting in the new plugs and coils helped alot I dont have to drive with both feet anymore but accelerating and climbing up hills is sluggish and it uses too much gas. I am hoping removing the cat and cleaning it will help. Any suggestions would be appreciated.
Would you recommend for an 04 suburban? 😅
good bideo. the first O2 sensor just measures the air fuel ratio.
Do you have to remove it when you get your smog test?
Great question. For Offroad vehicle…didn’t need a smog test. So I’m not sure in the street how it would work.
Can someone post how they are doing this? Do you have to drill a hole somewhere as some are saying or are you just threading this into the existing hole?
AND….where are you finding this adapter ?
TIA
it doesn't read less exhaust it stabilize the voltage signal sent back to the ECM and in actually the distance it spaces is more important than straight vs 90 if room permits you can use 2 straight spacers to get the same distance as that 90
Depends on the vehicle. Some are now programs to see the change within a certain time limit on deceleration. So Spacing it too far would still cause a light.
Hi good afternoon. Got a question I have a nissan altima 2008 2.5 and it gave me cod P0240 . When I put the car on drive it makes a loud noise and it go on reverse when it on drive. What that me is it my axle is broke.
Good looking out my friend
this can work for jeep patriot right? not just jeep wranglers or the other jeeps similar to that?
Definitely a great modification to fix emissions on any off-road rig!
Thanks Brett!
Great awesome video bro ! Obey all law's 🤣🤣🤣 I just had to subscribe 🤣🤣🤣
Hell yeah I've got an 89, year 1, 5.9 cummins ram you can go to town on
Have an off road vehicle only & while the light doesn’t illuminate, it still shows up when scanning ( bank 1 ) P0420 code. Any tips ?
That’s strange. It could just be that the computer has seen the issue, but hasn’t seen it often enough to throw the light. A computer usually has to see it 3 times within a certain amount of runtime/mileage for it to actually trigger a light.
When it comes to eny light in the dashboard is not always the cat too many sensor on the car and those computers are crazy
How do I check at what percentage efficiency is my cat ?
Thank you
Does this fit all cars? Mine is 2005 toyota Camry does this fit for me? I have p0420 code
If my car is staling, would it be ok to try this? I'm barely making ends meet and can't afford to fix catalic converter.
If it’s stalling..you are far beyond this fix. It you are driving in the street you should have it fixed properly. The stalling could be a completely different issue. But it could be a clogged catalytic converter and could cause other issues.
I have done the spark plug spacer for an o2 sensor 3 times and every time it worked lol so I’m moving to the next video lol
For a P0420 code, do you extend the sensor on the passenger or driver side?
That code refers to bank 1. Bank 1 is whichever side of the motor has cylinder number 1, so it would depend on what motor you have in your vehicle. At the same time, both Cats have exhaust flowing through them at the same rate. So if you have it for one side…the other side probably isn’t too far behind and will probably throw a code soon. Just remember though, this is for Offroad use only. If you are doing this in the street to cheat emissions….you are risking a big ticket and fines of caught. So it might be better to just clean the cat out or replace it. Replacing it with an aftermarket CARB approved cat will save you money over the factory cats.
@@WarPaintOffroad Yup - This is for an offroad rig. I noticed that the part comes with an o ring and a few other items but no instructions. Your vid doesn't show the install either. Where do the other parts go on the extender?
Can this help with getting the catalytic monitor to turn on?
I have a 2012 dodge Durango with this work from my SUV?
It might. It just depends unfortunately. Depends on how worn out everything is.
What if I just unscrew the 02 sensor and tape it off somewhere
That wouldn’t work. Because the sensor needs to read something and it knows what it’s looking for. If you pulled it out and taped it off it would absolutely cause a check engine light…
Would this still be ok if you had emissions test?
Tough question. Depending on how bad it is…it could be. It just depends on what the state inspection level is versus the level of pollutants the car is putting out. So I can’t speak to that. It’s truly meant just for Offroad use. To eliminate a check engine light so the driver can see a light come on for a potential issue down the road.
I'm dealing with this same deal on a 2007 FJ Cruiser. I had it diagnosed t my mechanics shop today and it shows the Cat is bad on the driver's side. Number 2 bank I'm assuming. The O2 sensors weren't throwing codes. Im wondering if this could be applied to my FJ?
Mine is p420 I bought a 2004 Honda accord ex sedan the cat was stolen they had a universal one on there I bought one for 170 and replaced the whole exhaust and the engine light came back on after a month
Here for it! CRC emissions cleaner. It says pour in when @ 1/2 tank but just filled up. Hoping it fixes my issue. 🙏
Results?
I did it the CRC and don't work
Nothing you add to the fuel tank will clean a car after it’s clogged to the point that it throws a cel
My car has one oxygen sensor. No downstream sensor. No cat. The cel is on. Will it work?
I want to do this except I want to HOLLOW the cat AND install this with 2 straight extensions AND one 90.
On my “off-road” Lexus sedan of course. 😅
This only works if the cat is mostly ok and functional, just “weak” and not making threshold values.
Your hallowing would be a cat delete which will require programming the cat out of the fuel tuning loop.
Thank you for this video I really do appreciate it. Is that copper o-ring that comes with the j-spacer supposed to go on before you screw on the oxygen sensor basically between the spacer and the oxygen sensor?
The o2 sensor has its own o ring.
@@WarPaintOffroad got it Thanks for your response. Thanks for the video
I have a 2017 dodge carvan, check engine light has been on for 30 000miles.i just replaced all 02 sensors and it finally went off for a day. When my tr tion control light comes onI loose power have to pull over shut the car off,then restart again. My husband died last year he said he didn't pit a gasket I where cc goes to exhaust?can this cause this problem?
I'd love for you to look at my car ...I love learning so I'm not stranded..
I can tig weld really good im a try this ill keep you posted my Subaru cat is a dealer only item. 2K ouch
Crazy right?
So i have my cats cut off and straight piped, how can i get my 2010 jeep grand Cherokee to run better without buying new converter?Thank you
Usually that would require putting the vehicle in a dyno with a software/programmer than can tune the vehicle for it.
clean your MAF sensor
Would this work for a 2015 Honda Accord? I replaced both
Sensors and my check engine light is still on
Where did you get that bypass for the O2 sensor
Which should it be installed on first or second sensor upstream or downstream?
The second.
@@WarPaintOffroad Thanks
What size should be used or is there a standard size?
Thanks for the tip!
Think it’ll work on a 06 hummer?
Thanks again
It's interesting I got a 2008 dakota with a leaking exhaust manifold and no one makes new one the all warp I'm told this just happend to get a p0420
Yes. An exhaust leak can cause this code too. It’s still a cat code… it an exhaust leak can affect the readings. It’s very possible.
Where did you order that 90 degree defouler from? I've looked everywhere for one and can only find the straight ones which won't fit into the small space that I have.
Vibrant Performance J-Style Oxygen Sensor Fittings 19019
were do you find that adaptor?
Would this work on a 05 4.0 Nissan frontier??
It might. But be forewarned that evading inspection and environmental laws will result in big fines. So I wasn’t kidding when I said Offroad only.
Can it be removed and plugg the hole?
Where can I buy this part can I get a link?
Am a new subscriber on this channel
Thanks for the support!
What would the option be for a cat delete? Would this still work?
He is talking about a cat delete without saying the words "cat delete" 😂
Best video. Thanks.
Yesss.yess..offroad 😉
Will this still work if your cats are gutted out? I'm thinking about having mines gutted, so they are still there visually!
We get it. We want clean air.
Ford should be sued for making it so expensive to have to change exhaust manifold with cat. Maybe others do it too but ford is the one i ran into.
Yea they do that to force people to go back to the dealer. At least that is my thinking. The Mopar Pentastar 3.6 molded the exhaust manifold into the cylinder head. To you just bolt up the cat to the head and then to the rest of the exhaust. It’s fairly simple. But it’s. Ot quick enough or accessible for the guy with a saw that wants to steal it. So you never heard of the 3.6 Mopar having its cats stolen. Kind of cool.
All the dealers should be sued they sell us there problems for way too much and once a problem is discovered they just tell you what the repair is and if you have their warranty they try not to honor it
Nissan as well
Yes my Lincoln MKX has engine light on and says it the Catalytic Converter
So where do you get one of these extensions?I need one
Laquer thinner hack works also...
???
My truck has two cats on the downpipe. The sensors are both before the 2nd cat. Can I remove that 2nd cat without getting a CEL? Seems like you should be able too since the 2nd cat is after both sensors. Any advice would be greatly appreciated!
If you don't have a sensor after the second one, then yes you can remove it. It's probably just a resonator and not a cat
Definitely a resonator not a cat. Other wise it would have sensors
Laws and earth safty?
I’m new to the channel just wanted to say hi
Thanks for the support!
What store can I go get one?
Just have to look around on the internet. They are out there. Multiple places sell them.
Where to buy the curved version adapter ?
On the internet. You’ll have to search. I bought it from a website that is no longer up and running. But there are out there. A quick google search and you’ll find them.
The biggest hack for this issue is not this one. The best hack is to vacuum seal the downstream O2 sensor, and plug the Cat Conv hole. This way, the O2 sensor due to vacuum seal will not sense any O2.
That’s a great tip. But…it won’t work on new-ish vehicles because the second sensor needs to see a change in less than a quarter of a second following the other O2 sensor on deceleration. They programmed that in to ensure people don’t do what I mentioned or what you mentioned. But you can play with the distance on the extension to make it happy. So it just depends.
How you do that? Can explain because I want to try it
what should i google to order this