NEW UPDATE !!!! Many people asked about wether or not the car passed a smog test after this. The day for NY State inspection finally arrived. Yesterday Jan 18 2025 I went for emissions testing and my Sonic seen in this video passed with no issues. Mileage at time of inspection 215,277. That’s 17,835 miles since the Seafoam treatment. Yes I drive that many miles between state inspections. Wish I could share a picture of the test results.
I am glad I found your video. I spent around $100.00 on cleaners that you add to the fuel. But not one of them work. I did what you showed in your video and it worked. Thank you.
Thanks for taking the time to make this video. To be honest I didn’t think it was going to work, for a money I thought you were about to blow up your Catalytic converter and your muffler but I’m glad that you didn’t for you and because I have the same problem in my truck
@@gerardoespinoza7202 this is simply a cleaner there is no way this would harm the exhaust. Some people go as far as removing the CAT and soaking it in soapy water to clean it. In this case, once you use the sea foam, wait a few minutes for it to soak then turn the car on to blow out the sea-foam and the heat will completely dry out anything inside the exhaust system.
UPDATE !!! After so many people reached out to me regarding the dinging sound from having the key in the ignition. I decided to edit the video and remove the first minute and a half which eliminates the dinging sound portion of the video. I do apologize to all of those who sat through it, but I do appreciate that you did. You can now watch the video without going insane 😂
I have a P0420 code on my 2007 Toyota yaris but no engine light, I only found that out through Scan tool, what do I do because it is not smog ready, it given me the yellow exclamation mark rather than the green one. what do I do????could be I just have drive a few miles for it to go through the cycles, since it is only yellow and there no check Engine Light?
@@alexshatner3907 which scan tool are you using? also is your check engine light itself working? Like do you see it come on briefly when you first turn on the ignition. Sometimes the bulb blows out it’s why I’m asking.
@@alexshatner3907 here’s what I found online for you A yellow exclamation point on a scan tool indicates a possible problem with one or more of a vehicle's systems. This could include a pending diagnostic trouble code (DTC) or emission monitors that haven't run their diagnostic testing
@@crushrreviews Yes the engine light does momentarily turn on when you turn on the car, I am using the BlueDriver Bluetooth Pro OBD2 Car Scan Tool and Code Reader, I was told I just have to drive it longer to go through its cycles not sure
As An ASE certified diagnostic tech... Catalyst failures [P0420] are due to damaged converters with the honeycomb biscuit catalyst being broken up or melted, sometimes due to previous or current misfires. In that case the catalyst must be replaced. The other common problem happens due to Sulphur build up on the catalyst because of slow drivers. This issue can be alleviated by punching it when getting on freeways or pushing the vehicle up long hills. [Heavy acceleration attempt.] The goal is to create a rich fuel mixture to burn off the Sulpher and keep it burned off. You may have smelled the Sulphur being behind someone getting on the freeway, this is a vehicle that is normally driven slow. At the shop we use a fuel injection kit that comes with an induction cleaner as an off label use to attempt to clean the Sulpher off a cat. In that case we run the engine RPM at around 2200RPM [Never go over 3000RPM, preferably stay under 2500RPM when free spinning an engine in P/N] and turn the induction cleaner onto a high flow. [induction cleaner gets sucked into the intake manifold] In this process you MUST watch the catalytic converter and ensure by adjusting the flow rate as necessary to make sure the converter never glows more than a dull cherry red, otherwise you would permanently damage the cat. #1 You can try to fix it by doing a bunch of hard driving and then try resetting the codes. or #2 Try using the fuel injection induction cleaner in the procedure described above and the resetting the codes. Keep in mind that after resetting the codes, drive cycle monitors are also reset and you must drive the vehicle under the correct parameters until the drive cycle monitors pass [AKA I/M monitors] before the vehicle will pass a smog check. The evap system takes at least two days coming from a cold morning start of the engine. Look up the monitors for your vehicle. Catalyst monitor usually is engine warmed up, drive vehicle at a stable speed without moving the accelerator, at 50-60MPH for 10 min
Interesting point. The issue with my old chevy Truck is that when the engine is running there's a very strong fuel smell that comes from the exhaust. It runs fine but the smell obviously means that I have an issue. Can this also be related to the catalytic converters?
I changed both my o2 sensors on my 2012 civic si. 274,000 miles. Disconnected my battery (negative terminal) for 5 minutes and check engine light disappeared ... never came back after since changing the sensors but shows graciously on my OBD2 scanner for the PO420 as "permanent" lmao. Although I want to say, before changing my sensors, my Civic was running so damn rich with the check engine light on it was eating gas like a V8! Up until I changed the sensors the car has been running so good like its new until i plugged the scanner in and saw the code. What should I do man? my tags literally need to be renewed on New Years day of 2025 LOL! No check engine light has returned, no power loss, gas consumption is like new but the readings on it is off, and when i took it for emissions i was told that the CAT is not ready. IDK what to do im stressed out lololol
ive been a certified since the certification came out... 90% arent just plugged not broken up.. Ive recycled thousands of them... dont try to lie to people to make them think you know what your talking about ...
My 17 Tacoma at about 160 thousand miles had a code for both cats. Toyota wanted over 5 grand to replace them. It took 3 cans of Cataclean at $30 but 15 thousand miles later when I traded it in it was fine. First can light went off for a week, second can a month and the third can did the trick.
just got done doing it on my 2012 nissan Sentra, i think it worked because the code hasnt popped up again but i just need to complete 200 miles and 20 drive cycles for the permanent code to clear of the vehicle history. thanks for the advice man
Going to try this, I have a 04 Lexus RX330 with 240k miles, Code P0420/P0430 been on for a year now, Recently tried Injection cleaning service and adding CataClean into gas tank but did not work. SMOG is due this month and i just have to this this, maybe find a open space so the smoke doesn't bother anyone. will keep you updated.
@@Bercedes-Menztry the smoke on your air lines.. I got a video on how I do mines and it works for me.. but before I do that I replaced my both cats and 2 sensors and It was a bad leaking hose
I'll give it a try tomorrow. I was thinking about pouring some lacquer thinner or engine degreaser into the upstream oxygen sensor plug hole, but after watching your video, the seafoam seems much safer. Thanks!
My 2003 Honda Accord has a Check Engine light (P0420 Catalyst Efficiency Below Threshold (Bank 1) code) on and it looks like i found the solution, will look for sometime and get it done.
please let me know how it goes. i have that exact same issue and used cataclean in my gas tank but i’m yet to try to discard the engine light to see if it turns back on
Trying this as my last resort before having to replace my CC. Lots of smoke on the property. Lucked in that the smoke didn't blow towards any of my distant neighbours whilst in my 07 Corolla and to be safe I was wearing a half mask respirator that would filter any of those white fumes. So far so good. Thanks!
So far so good is great to hear !! Keep us updated. Thx for watching my video. If you’re no already subscribed, please click that subscribe button for a chance to win a free click type torque wrench. Check out my other video titled “torque wrench giveaway” for a chance to enter and win
I want to thank you this worked on my 2006 Altima. Got it passed. Emission test. And light is still out many days later. 🎆🎆🎆 Now today the wife told me the her. TSX light came back on so am going to do the same. To that car. Need it too stay off for my. Inspection is do soon. Thanks again 🎆🎆🌲🌲
I use a product like this I don't know every 15-20k to keep everything clean and running smoothly! As I get older I try to do these things to avoid bigger problems
I used dura lube cat treatment on my wife's car. Just added 1/3 of the bottle to her half full gas tank. I'd planned on using the rest when she filled up but the light went off and hasn't come back. The exhaust smelled pretty bad for about a week then it went away.
Honestly that could be several things. If the engine light's blinking it's probably a misfire that hasn't set a code yet. On hondas (probably other cars too) low oil, a bad or clogged vtec solenoid will cause bucking - this would probably have a code and happens during acceleration. A really clogged cat will act the same way but that would definitely have a code
@@onlyletisrickolous it may work for you or maybe it won’t but for a $10 investment it is definitely worth a try. Please keep me posted on that. Also, even if it helps keep your check in engine light out long enough to pass inspection. It’s a win.
@@sapphirejan2040 I did not get to try this method. I had already tried Cata-Clean the month before. It did clean the cat very well and improved the gas mileage but with these additives you have to try them very far apart. Especially with some of the solvents in some that can react with alkalines in others. My case was unique because the SUV I bought had sat for a year while waiting for an engine from Ford. So the cat had to be changed out as well as the sensors. The tactic in this video seems solid and if I had not tried the other cleaner I would have done this. Seafoam products have been a go-to over the years.
I tried this method and man, it smoked a lot. I had to do it around 9PM so that I wouldnt scare my neighbors lol. Anyway, I finished pouring the seafoam around 3pm and let it soak to 8:30pm. After clearing all the smoke, I do feel the car runs smoother and somewhat more responsive. But here is what happened too. So before I tried this, I put on O2 sensor adapter on downstream O2 sensor and was able to pass the Smog test, I was gonna just drive it like that but then I thought I have nothing to lose so I tried this seafoam for the first time. I dont know if its the adapter or the smoke, the next day the car popped p0139 code, calling for O2 sensor 2 slow respond or something like that. So I took off the adapter and put in a new O2 sensor, this time without the adapter and no more code. I will update how long that will last. Hopefully it will be awhile because replacing the cat bank 1 on my 08 Acura RL is a PITA.
I'm just commenting... you should be able to remove the passenger axle & half shaft...and remove the rear cat through the wheel well where the axle was. Take off both oxygen sensors.. and it should come out with lowering the bottom collector pipe too!
if you use cheap gas that will also cause lots of carbon build up and check engine light, use good gas like sunoco or Exxon, use good quality gas..happened to me and I used good gas for a month and check engine light for o2 sensor cleared
You all need to understand that each cat converter is different and depending on how old it is and how much dirt build up inside especially if there is engine oil leaks definitely need new converter. I would say this method he showing would work of the issue at the early stages and not much crap build up inside the cat converter
I started with. 420 code replaced the o2 sensor then got a air fuel ratio code & it’s been like 3 years I can’t get rid of the code definitely giving this a try ‼️
we have the p0420 code. we bought both cats for the car. I didnt do the seafoam trick. but I did put the crc emissions stuff in the tank and I replaced the o2 sensor then cleared the code. We drove about 115 miles and when i put the obdII on it the drive cycle wasnt complete. but now its days later after driving car daily and the light has not came back on at all. but you have to put the obdII on it to see if that p0420 code is sitting in the bank because the code will reapair but it wont throw a check engine light. in the end as long as that p0420 code is there the car will not pass state inspection because once their machine see it then it fails it. I put my obd on it and dont see anything. that dont mean the states machine dont see it.
Look up GM OBD2 dive cycle, it takes about 15 min to complete the cycle after you reset the light, then you can drive right to the emissions testing station and get it done before the light comes back on
Have same code 20 and 30 . I did the spark plug fouler.. the cleaners in the tank . My.. 2008 tundra 200 000 miles low pressure wen I press the gass. .I'll definitely try this today. Thanks
I've been dealing with the same issue on a 2015 Volvo S60. The P0420 code keeps turning on and off. I'm going to see if I can do this and save the small fortune. Thanks.
If you really cannnot remove the upstream sensor than you can try the other methods, but it won’t be as effective. Definitely worth a shot. Atleast you’re trying something.
any update now that its been about 6 months? I have tried all cata cleaners that you can find at autozone but they seem to only work short term. I mean it makes a whole lot more sense that if you wanna clean the cat, you have to clean the cat, not something that pour into the gas tank.
Fuel injection cleaners that come with an induction cleaner which get sucked into the intake manifold works great. I've done hundreds of them. You must have the tank and hose/valve to connect to the vehicle intake and put the induction cleaner in and then run the cleaner at a heavy stream being careful to not let the Cat glow more than a dull red. What is happening is the Sulpher is getting burned off the catalyst honeycomb.
@@DrHarryT I tried some fuel cleaners but not the one that hooks to the air intake. I tried the ones that you add into the gas tank but they didnt work for my p0420. Which fuel injection cleaners do you use?
Has the light come back on, I've tried Catoclean, works and light went off, then exhaust leak gotten worse and it came back on after time. So I don't know if small exhaust leak, haven't looked as I can't anymore from pain on my Honda 2.4L these all seem to get the same code from chevy to Honda to Kia and others that has 2.4 engine, not in my old 1999 Plymouth voyager, clogged instantly at 170K and never burned oil ever, still in yard with clean oil at 200K , off road from 2011, need to scrap it
Light never came back on. I made a separate video showing the Scan Tool read after several hundred miles to show that there were no pending or permanent codes. Please see my other videos if interested in seeing that one.
My buddy's muffler shop told him to do the same thing. But my buddy is hardheaded and is going to a mechanic. Just to pay someone money to tell him to buy a new Cat and install it. It's probably gonna cost him $1,100.😢
@@fordresurrectionest9556 wow I’m sorry to hear that. I’m not saying it’s a guaranteed fix, this method may not work for everyone, but for a small $10 investment it’s worth a shot before spending a small fortune.
I poured Seafoam in the fuel tank, I think it cleaned the entire fuel system, but unfortunately for me it didn't clear out P0420 code. Check engine light keeps coming back. It'll go off for awhile then come back. I'm going try your method next to see if it works.
@@El_Ka69 you say it cleaned the entire fuel system 🤔. If you sprayed it directly into the CAT from the oxygen sensor port, then It would not have gone through your fuel system. It would have gone directly into the exhaust. How did you use the Seafoam?
Like any thing added to gas tank , laquer thinner is best, 6 gallons gas to one gallon of laquer thinner, then drive 120 or more miles non stop to clean out system thoroughly.
@@marvxc18 the light will not go away immediately. After changing the cat, you have to drive a couple hundred miles or several cycles before the computer realizes the problem no longer exists and turns off the light. If you’ve already done that, then maybe you have to replace the oxygen sensors. There are videos on RUclips that show you how to test an oxygen sensor. Unfortunately I don’t have a video like that.
My 2015 HONDA fit same thing the Engine light went on and i stop at the O'reilly for free scan . showing p0420 as everyone in here. i clear the code and put STP treatment in the fuel tank at the gas station aslo fill it full. i wonder will it hard to do the 2015 honda fit. thanks.
Does it work in larger engines I have a 1st Gen 5.3 Ls but according to the instructions on can it says to insert in throttle body while engine is on so just want hour take on this matter should I apply it through o2 sensor or directions on can
@@robertsanchez6998 you should definitely go through the 02 sensor opening if possible, that way you would be putting 100% strength directly into the cat, versus going through the throttle body where the engines combustion would burn it before it has the chance to go through the cat. Hope this makes sense to you. Keep me updated
P0420/P0430 is ALL RELATED TO A PLUGGED CATALYTIC CONVERTER (if you have 4 cats, it will always be the front two closest to the manifold. The front two cats are also metered with your upstream O2 sensor and downstream O2.
NICE. I have a 2013 Dodge Journey 3.6 it has a catalytic converter in the front and another one under the middle of the car. do you think it will not hurt the under neath converter 02 sensors???
@@NewBayERA it will not hurt the sensors. In my video I only removed the top sensor (upstream sensor) just to have direct access to spray the CAT. I did not remove the bottom one (downstream sensor) It did not harm the sensor.
I’m a firm believer in the seafoam I use it in every thing to fuel oil the booster line. I also have had that rotten egg smell in my cat but did a few treatment of it and has gone a way. I will find out today or tomorrow if it really works after having my emissions done.
When you are spraying the seafoam into the air sensor slot, does that clean all the banks of the catalytic converter. My air sensor is under my truck. Thanks.
@@brownyes6211 It will clean whatever cat sits below that 02 sensor. If you have 2 banks you will need to remove and clean each cat through the top of both upstream sensors.
@@brownyes6211 remember that it has to go through the hole of the upstream sensor not the downstream sensor. The upstream sensor usually sits below the exhaust manifold just before the CAT
Hi. I used the Seafoam on my 2020 Hyundai Elantra and the light came back on in about 2 days. my car has 190000 miles on it and I did exactly what you said to do. Is it safe to do add another can of Seafoam to see if that will do the trick? Thank you
@@robertwrightiii you should try driving it hard on the highway to help blow off any loose carbon buildup on the CAT. Also be sure there is no exhaust leak in the area before the downstream sensor. If in several days the light doesn’t clear, you’re probably going to need a new cat. I would also recommend checking that upstream oxygen sensor to be sure it’s working correctly. If not, replace it.
My honda pilot 2013 had the code, the mechanic said they cleaned the mass airflow sensor and charged me 400$. Then the check engine with same code came back four weeks later. It stayed for a week, then disappeared but it keeps coming on and off intermittently. Any tip you can give me? It's about 175k miles
@@robertroman55 if you have a bank 2, that’s a separate upstream oxygen sensor. Bank 1 is passenger side of vehicle or right side of engine. Bank 2 is left side of engine or driver side. For each bank, there are two separate oxygen sensors, bank 1 upstream and bank 1 downstream, then bank 2 upstream and bank 2 downstream. So if your code is reading bank 2, then it would be the upstream oxygen sensor on the left side or driver side of the engine that you would have to remove and spray. But it would not hurt to do both bank one and bank two. I hope this makes sense and I’m not confusing you more.
I find any Chevy product to be the worst. Absolutely worse for there sensor issues and going off with codes. How do I know? I owned to many. No more and it’s been 10 years and never had an issue with other brands
Also, just curious if your spraying right into the cat and not the motor I would think it doesn't have to be seafoam..it could be brake clean, carb cleaner, etc
Brake clean or carb clean is completely different and fairly quickly evaporates so it would do no good. Seafoam sits there and penetrates the buildup in the cat.
I tried this with a bottle of carb cleaner and the short red straw fell into the hole. Took off the bolts on the cat and now i cant find the straw. Weird.
I had a rough idle caused by opd spark plugs my V6 has 2 cats, current codes are P0300, P0420, P0430. New pligs so runs smoother hoping codes clear in next 100 miles if not I guess I'm trying this in each exhaust half
I have two Cats (V6) and 4 sensors! OBDII indicates P0430 (Bank 2).. should I work on Bank 2 and ignore Bank 1? By the way, if this works, it will save me $1,800. Thanks.
@HeydaCarreras it's the pipe on top to the engine connected to the EGR valve was blocked that's why my light code was open but I need to change my cooling sensor cuz the radiator fan starts when vehicle is not warm 🥵🥵 happy new year to you 😄😄
Great it is the first video that really solves the issue. I just have a question: In the monitors (OBD II) does it show as complete? The issue I have is that It does not present a code but in the monitors shows the catalyst as Incomplete. and therefore it does not pass smog. So in you experiment, was the catalyst shown as complete?
I use the Walmart super-tech brand with the Acetone it does a much job than sea-foam and it’s much cheaper Roughly three bucks a can compared to almost $9 bucks for sea-foam it’s more of a lubricant the Acetone is the primary ingredient in the supertech throttle body cleaner and I have is much effective in desolving carbon buildup and varnish good luck 👍🏽🍀
The carburator cleaner or parts cleaner? Man this would be my last option, i ve tried everything even removed it and soaked it over night! Def dont want to pay the $2300 for a new cat😩
@@brittneywilliams8851 hi, thanks for watching my video. you absolutely can. It’s not a guaranteed to fix your problem but it’s definitely worth a shot and you run no risk of hurting anything. If you read the comments, you’ll see it has worked for quite a few people. Let us know how it works out for you.
@@danielkalanyos9130 you should definitely give it a shot. You’ve got nothing to lose and everything to gain. If you’re not successful at correcting your P0420 with this, you’ll at-least help improve its performance by cleaning the cat. Maybe you’ll get both !! Keep us posted. PS be sure that engine is cool before starting this job.
I have a 2013 Acura TL SH-AWD V6 can I try this without removing anything? Really on a budget I have a below threshold on bank 2 code.. I’m getting really high $$ estimates hoping I can get some luck to buy me a little time until repairs. My car idles really rough, losing power, & a shaky when I’m at a stop
Sorry for the delayed reply. There are many ways to treat the CAT with a cleaner, but spraying directly as I show in the video gives you better results than the other methods. If you really don’t want to remove anything, try using one of the gas tank treatments like Rislone and then take the car out for a drive and try to drive it hard like one of my viewers mentioned. This should help clean the cat out with forced pressure from acceleration. Hope this helps.
just did this on my 87 ford f150 with the 5.0L. smokes like a banshee for 15 minutes after starting it back up....white cloud. hopefully this did the trick. I don't have a code for this (ODB1)...the O2 sensor is new (bosch) and was black as soot.
Spray into the opening after removing the upstream sensor, let it soak for about 20 minutes, then idle the car for about 10 minutes or so until the smoke dissipates. When smoking out the exhaust, idle the car at about 1500 RPM. It will help heat up the exhaust and burn out the residual Seafoam.
do you have to reset the thing with that device before you test drive it ) or will engine light eventually go off by itself after you drive +/- 100 miles ?
You can reset it if you want to, but the computer will erase the code and turn off the light on its own after a few drive cycles where the problem is not present
I got a 2014 Honda accord sport with the P0420 error code. I am going to replace the censors AND I am going to use thi magic Seafoam. Not idea this was around. Thanks for this video. I just subscribed
@@crushrreviews thanks…. Well, I just bought them all. Trying the foam now. It is fine, compared with the ripoff from Honda, $300 is nothing from autozone. My motor vehicle inspection is due next month. Thanks a lot for your help. Without you, I wouldn’t have saved soooo much
Be careful where you put dielectric grease or any kind...because the O2SEN needs ambient air to function. Air is drawn in through the wire harness for comparison to oxygen in the exhaust.......I'm not sure if it applies to A/F SENSORS....BUT IT DOES WITH. ZIRCONIA SENSORS
The black piece is actually made to be used on your intake manifold, That's why it shaped like it is It helps direct the straw from the seafoam can directly into the Intake past the sensors so it doesn't damage them in the process.
@@PathToPeaceMoe that would be a code for bank 2. Definitely worth a try. if it persists after the cleaning, try replacing the upstream sensor on that bank
One of my previous high mileage cars has this code occasionally. I reset the code then notice that the code doesn't return until after refueling at Costco Wholesale gas station.
Seafoam actually works in the oil, gas, ( & obviously in the exhaust too) says so right on the can.... Seafoam is great stuff. I had old gas in my Harley. I drained as much out of the tank as I could, by siphoning, since I didn't want to remove the tank. I was told by Seafoam to add a can of Seafoam to the tank with a gallon of fresh gas.... It worked great, cleaned up the fuel pump, injectors, hoses & lines, & any residual old gas & varnish!
@@LOLONO666 Hi there, I don’t think it would be as effective. I know people have removed the catalytic converter and soaked it in soapy water several hours, but as far as treating it with soap & water while still installed, I don’t think it would be effective. Save yourself the trouble and use the Seafoam, you’ll have much better results.
@@toontoonjr. I wouldn’t recommend that since you have to spray nearly an entire can through there. Also you want to spray that directly onto the CAT for best effectiveness.
did the P0420 code leave ? why didn't you show that . Without that information I could still fail inspection. i say that because the check engine light could leave but the code will still be in the CPU or not Sync up, it will still have an X and not a check Mark next to the cal code for newer cars . wish you would have shown that . needed to see that before i do a 4 day test . other then that good Vid
@@KESSTHEMC you’re right ! I should have done the re-scan afterwards. My code was gone because it was a pending code, it had not become a permanent DTC yet. Unfortunately Permanent DTCs cannot be cleared with an ordinary OBD scanner. If your code is permanent, the problem would have to be corrected and the car has to go through about 10 normal drive cycles before the ECM clears the permanent code automatically.
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NEW UPDATE !!!! Many people asked about wether or not the car passed a smog test after this. The day for NY State inspection finally arrived. Yesterday Jan 18 2025 I went for emissions testing and my Sonic seen in this video passed with no issues. Mileage at time of inspection 215,277. That’s 17,835 miles since the Seafoam treatment. Yes I drive that many miles between state inspections. Wish I could share a picture of the test results.
Thanks for the update!
UPDATE !!! Mileage is now 199,143 and the Check Engine light is still off 😮 that’s 1,701 miles since the seafoam treatment 😎👍🏼🔧
Thank you for the information. Keep up the good work brother.
Thanks for the video. I'm going to try it. Like you said, it's just $10 vs new cats.
@@jasonkristek5643 please come back to the video post afterwards and let me know how it turned out for you 💪🏼
Any update?
Damn i have to try this
Got rid of my P0430 on ‘10 Lexus IS250 and literally just passed emissions… Glad I came across this video 💯
I am glad I found your video. I spent around $100.00 on cleaners that you add to the fuel. But not one of them work. I did what you showed in your video and it worked. Thank you.
@@johnbarton2112 thanks for coming back to share your results
Thanks for taking the time to make this video. To be honest I didn’t think it was going to work, for a money I thought you were about to blow up your Catalytic converter and your muffler but I’m glad that you didn’t for you and because I have the same problem in my truck
@@gerardoespinoza7202 this is simply a cleaner there is no way this would harm the exhaust. Some people go as far as removing the CAT and soaking it in soapy water to clean it. In this case, once you use the sea foam, wait a few minutes for it to soak then turn the car on to blow out the sea-foam and the heat will completely dry out anything inside the exhaust system.
UPDATE !!! After so many people reached out to me regarding the dinging sound from having the key in the ignition. I decided to edit the video and remove the first minute and a half which eliminates the dinging sound portion of the video. I do apologize to all of those who sat through it, but I do appreciate that you did. You can now watch the video without going insane 😂
I have a P0420 code on my 2007 Toyota yaris but no engine light, I only found that out through Scan tool, what do I do because it is not smog ready, it given me the yellow exclamation mark rather than the green one. what do I do????could be I just have drive a few miles for it to go through the cycles, since it is only yellow and there no check Engine Light?
@@alexshatner3907 which scan tool are you using? also is your check engine light itself working? Like do you see it come on briefly when you first turn on the ignition. Sometimes the bulb blows out it’s why I’m asking.
@@alexshatner3907 here’s what I found online for you
A yellow exclamation point on a scan tool indicates a possible problem with one or more of a vehicle's systems. This could include a pending diagnostic trouble code (DTC) or emission monitors that haven't run their diagnostic testing
@@alexshatner3907 have you already done the Seafoam treatment like I showed in my video?
@@crushrreviews Yes the engine light does momentarily turn on when you turn on the car, I am using the BlueDriver Bluetooth Pro OBD2 Car Scan Tool and Code Reader, I was told I just have to drive it longer to go through its cycles not sure
As An ASE certified diagnostic tech... Catalyst failures [P0420] are due to damaged converters with the honeycomb biscuit catalyst being broken up or melted, sometimes due to previous or current misfires. In that case the catalyst must be replaced. The other common problem happens due to Sulphur build up on the catalyst because of slow drivers. This issue can be alleviated by punching it when getting on freeways or pushing the vehicle up long hills. [Heavy acceleration attempt.] The goal is to create a rich fuel mixture to burn off the Sulpher and keep it burned off. You may have smelled the Sulphur being behind someone getting on the freeway, this is a vehicle that is normally driven slow.
At the shop we use a fuel injection kit that comes with an induction cleaner as an off label use to attempt to clean the Sulpher off a cat. In that case we run the engine RPM at around 2200RPM [Never go over 3000RPM, preferably stay under 2500RPM when free spinning an engine in P/N] and turn the induction cleaner onto a high flow. [induction cleaner gets sucked into the intake manifold] In this process you MUST watch the catalytic converter and ensure by adjusting the flow rate as necessary to make sure the converter never glows more than a dull cherry red, otherwise you would permanently damage the cat.
#1 You can try to fix it by doing a bunch of hard driving and then try resetting the codes.
or
#2 Try using the fuel injection induction cleaner in the procedure described above and the resetting the codes.
Keep in mind that after resetting the codes, drive cycle monitors are also reset and you must drive the vehicle under the correct parameters until the drive cycle monitors pass [AKA I/M monitors] before the vehicle will pass a smog check. The evap system takes at least two days coming from a cold morning start of the engine. Look up the monitors for your vehicle. Catalyst monitor usually is engine warmed up, drive vehicle at a stable speed without moving the accelerator, at 50-60MPH for 10 min
Interesting point. The issue with my old chevy Truck is that when the engine is running there's a very strong fuel smell that comes from the exhaust. It runs fine but the smell obviously means that I have an issue. Can this also be related to the catalytic converters?
Amen
I changed both my o2 sensors on my 2012 civic si. 274,000 miles. Disconnected my battery (negative terminal) for 5 minutes and check engine light disappeared ... never came back after since changing the sensors but shows graciously on my OBD2 scanner for the PO420 as "permanent" lmao.
Although I want to say, before changing my sensors, my Civic was running so damn rich with the check engine light on it was eating gas like a V8! Up until I changed the sensors the car has been running so good like its new until i plugged the scanner in and saw the code. What should I do man? my tags literally need to be renewed on New Years day of 2025 LOL!
No check engine light has returned, no power loss, gas consumption is like new but the readings on it is off, and when i took it for emissions i was told that the CAT is not ready. IDK what to do im stressed out lololol
@@GhadSpeed You have to drive for about 50 miles to reset the monitor before getting emissions test.
ive been a certified since the certification came out... 90% arent just plugged not broken up.. Ive recycled thousands of them... dont try to lie to people to make them think you know what your talking about ...
My 17 Tacoma at about 160 thousand miles had a code for both cats. Toyota wanted over 5 grand to replace them. It took 3 cans of Cataclean at $30 but 15 thousand miles later when I traded it in it was fine. First can light went off for a week, second can a month and the third can did the trick.
just got done doing it on my 2012 nissan Sentra, i think it worked because the code hasnt popped up again but i just need to complete 200 miles and 20 drive cycles for the permanent code to clear of the vehicle history. thanks for the advice man
Please come back and let us know how the smog test went
Going to try this, I have a 04 Lexus RX330 with 240k miles, Code P0420/P0430 been on for a year now, Recently tried Injection cleaning service and adding CataClean into gas tank but did not work. SMOG is due this month and i just have to this this, maybe find a open space so the smoke doesn't bother anyone. will keep you updated.
I tried it and cleared the code, but unfortunately my CEL came right back after driving 20 miles smh, i guess my CATs are no good.
@@Bercedes-Menztry the smoke on your air lines.. I got a video on how I do mines and it works for me.. but before I do that I replaced my both cats and 2 sensors and It was a bad leaking hose
@@lemossebas do you have the link for the video? would leaked airlines trigger check engine light and P0420 code ?
I'll give it a try tomorrow. I was thinking about pouring some lacquer thinner or engine degreaser into the upstream oxygen sensor plug hole, but after watching your video, the seafoam seems much safer. Thanks!
Great job Crusher. Thanks for the video. Thanks for the detail of what needs to be done. Very helpful.
My 2003 Honda Accord has a Check Engine light (P0420 Catalyst Efficiency Below Threshold (Bank 1) code) on and it looks like i found the solution, will look for sometime and get it done.
Please come back and let us all
know how it turns out.
please let me know how it goes. i have that exact same issue and used cataclean in my gas tank but i’m yet to try to discard the engine light to see if it turns back on
Trying this as my last resort before having to replace my CC. Lots of smoke on the property. Lucked in that the smoke didn't blow towards any of my distant neighbours whilst in my 07 Corolla and to be safe I was wearing a half mask respirator that would filter any of those white fumes. So far so good. Thanks!
So far so good is great to hear !! Keep us updated. Thx for watching my video. If you’re no already subscribed, please click that subscribe button for a chance to win a free click type torque wrench. Check out my other video titled “torque wrench giveaway” for a chance to enter and win
I want to thank you this worked on my 2006 Altima.
Got it passed. Emission test. And light is still out many days later. 🎆🎆🎆
Now today the wife told me the her. TSX light came back on so am going to do the same. To that car.
Need it too stay off for my. Inspection is do soon. Thanks again 🎆🎆🌲🌲
Thanks for coming back to share the results.
Did it work on both cars
I use a product like this I don't know every 15-20k to keep everything clean and running smoothly! As I get older I try to do these things to avoid bigger problems
Thanks Bro! I’m now a follower and ordered 2 cans for my ‘05 350Z and ‘15 QX80. Looking forward to trying it out.
I used dura lube cat treatment on my wife's car. Just added 1/3 of the bottle to her half full gas tank. I'd planned on using the rest when she filled up but the light went off and hasn't come back. The exhaust smelled pretty bad for about a week then it went away.
How many days did you drive with Cat Treatment in Tank when it Worked
I got no error code, and my car bucks rally hard and won't stop. Cat problem?
Honestly that could be several things. If the engine light's blinking it's probably a misfire that hasn't set a code yet. On hondas (probably other cars too) low oil, a bad or clogged vtec solenoid will cause bucking - this would probably have a code and happens during acceleration. A really clogged cat will act the same way but that would definitely have a code
@@billygilbert3910prob fuel filter, fuel pump or bad ignition coil
Very interesting. I am currently dealing with a cat code that is keeping me from passing emissions. May give this a shot.
@@onlyletisrickolous it may work for you or maybe it won’t but for a $10 investment it is definitely worth a try. Please keep me posted on that. Also, even if it helps keep your check in engine light out long enough to pass inspection. It’s a win.
Just curious how did it go? Did it work for you?
@@sapphirejan2040 I did not get to try this method. I had already tried Cata-Clean the month before. It did clean the cat very well and improved the gas mileage but with these additives you have to try them very far apart. Especially with some of the solvents in some that can react with alkalines in others. My case was unique because the SUV I bought had sat for a year while waiting for an engine from Ford. So the cat had to be changed out as well as the sensors.
The tactic in this video seems solid and if I had not tried the other cleaner I would have done this. Seafoam products have been a go-to over the years.
I followed ur instruction perfect , now I have 2 codes instead of one
😂
What is the other code?
You probably switched on the ignition while the air fuel sensor was disconnected, thus creating a fault and a dtc code.
I tried this method and man, it smoked a lot. I had to do it around 9PM so that I wouldnt scare my neighbors lol. Anyway, I finished pouring the seafoam around 3pm and let it soak to 8:30pm. After clearing all the smoke, I do feel the car runs smoother and somewhat more responsive. But here is what happened too. So before I tried this, I put on O2 sensor adapter on downstream O2 sensor and was able to pass the Smog test, I was gonna just drive it like that but then I thought I have nothing to lose so I tried this seafoam for the first time. I dont know if its the adapter or the smoke, the next day the car popped p0139 code, calling for O2 sensor 2 slow respond or something like that. So I took off the adapter and put in a new O2 sensor, this time without the adapter and no more code. I will update how long that will last. Hopefully it will be awhile because replacing the cat bank 1 on my 08 Acura RL is a PITA.
I'm just commenting... you should be able to remove the passenger axle & half shaft...and remove the rear cat through the wheel well where the axle was. Take off both oxygen sensors.. and it should come out with lowering the bottom collector pipe too!
your pretty brave to put on a extender to go get it smog, if they catch that , your paying a big fine
if you use cheap gas that will also cause lots of carbon build up and check engine light, use good gas like sunoco or Exxon, use good quality gas..happened to me and I used good gas for a month and check engine light for o2 sensor cleared
Happened to me as well
Hi, thanks for informative Video. Can we apply it on gasoline cars or only on diesel cars?
Yes we can
You all need to understand that each cat converter is different and depending on how old it is and how much dirt build up inside especially if there is engine oil leaks definitely need new converter. I would say this method he showing would work of the issue at the early stages and not much crap build up inside the cat converter
Just bought the sea foam, I will let you know how it goes, hopefully this works🙏
Did it work?
Answers are needed 😁 what has happened??!?
I started with. 420 code replaced the o2 sensor then got a air fuel ratio code & it’s been like 3 years I can’t get rid of the code definitely giving this a try ‼️
Did it work?
your post is completely worthless, nobody cares if you try we only care if it works or not
we have the p0420 code. we bought both cats for the car. I didnt do the seafoam trick. but I did put the crc emissions stuff in the tank and I replaced the o2 sensor then cleared the code. We drove about 115 miles and when i put the obdII on it the drive cycle wasnt complete. but now its days later after driving car daily and the light has not came back on at all. but you have to put the obdII on it to see if that p0420 code is sitting in the bank because the code will reapair but it wont throw a check engine light. in the end as long as that p0420 code is there the car will not pass state inspection because once their machine see it then it fails it. I put my obd on it and dont see anything. that dont mean the states machine dont see it.
Look up GM OBD2 dive cycle, it takes about 15 min to complete the cycle after you reset the light, then you can drive right to the emissions testing station and get it done before the light comes back on
Have same code 20 and 30 . I did the spark plug fouler.. the cleaners in the tank . My.. 2008 tundra 200 000 miles low pressure wen I press the gass. .I'll definitely try this today. Thanks
Did it work?
That sounds like a throttle body needs replaced bro
Yourr lime green gloves provide High Contrast with the parts you're working on!! 👍
I changed all my 02 sensors 0n my 05 wrangler and code never went away think i may try this
I've been dealing with the same issue on a 2015 Volvo S60. The P0420 code keeps turning on and off. I'm going to see if I can do this and save the small fortune. Thanks.
@fengetaset9488 Did it work?
I am also wondering if it worked? I have the same problem with my 2015 xc60
Can’t hear well with the bell in background
Will using sea foam in the gas tank or crankcase be of any value? I can’t do what you did in this video. Have same codes. Thank you.
If you really cannnot remove the upstream sensor than you can try the other methods, but it won’t be as effective. Definitely worth a shot. Atleast you’re trying something.
any update now that its been about 6 months? I have tried all cata cleaners that you can find at autozone but they seem to only work short term. I mean it makes a whole lot more sense that if you wanna clean the cat, you have to clean the cat, not something that pour into the gas tank.
Fuel injection cleaners that come with an induction cleaner which get sucked into the intake manifold works great. I've done hundreds of them. You must have the tank and hose/valve to connect to the vehicle intake and put the induction cleaner in and then run the cleaner at a heavy stream being careful to not let the Cat glow more than a dull red. What is happening is the Sulpher is getting burned off the catalyst honeycomb.
@@DrHarryT I tried some fuel cleaners but not the one that hooks to the air intake. I tried the ones that you add into the gas tank but they didnt work for my p0420. Which fuel injection cleaners do you use?
I have the same code on my 4th gen 4Runner, I'm going to try this and let you know how things turned out.
Has the light come back on, I've tried Catoclean, works and light went off, then exhaust leak gotten worse and it came back on after time. So I don't know if small exhaust leak, haven't looked as I can't anymore from pain on my Honda 2.4L these all seem to get the same code from chevy to Honda to Kia and others that has 2.4 engine, not in my old 1999 Plymouth voyager, clogged instantly at 170K and never burned oil ever, still in yard with clean oil at 200K , off road from 2011, need to scrap it
Light never came back on. I made a separate video showing the Scan Tool read after several hundred miles to show that there were no pending or permanent codes. Please see my other videos if interested in seeing that one.
Could you turn up the dinging noise its so soothing
@@douglasjherring 😂🤣 thanks for being a good sport about it. I appreciate your feedback and for watching my video.
@@crushrreviews I tried to watch but I couldn’t take the dinging.
My bank 1 O2 sensor goes directly in the middle of the cat. Can I spray directly into the cat? Thanks..
into your fuel tank should be enough
Yes you can
My buddy's muffler shop told him to do the same thing. But my buddy is hardheaded and is going to a mechanic. Just to pay someone money to tell him to buy a new Cat and install it. It's probably gonna cost him $1,100.😢
@@fordresurrectionest9556 wow I’m sorry to hear that. I’m not saying it’s a guaranteed fix, this method may not work for everyone, but for a small $10 investment it’s worth a shot before spending a small fortune.
thanks for sharing
i will give it a try because im due for inspection soon and i really need to get this check light off to pass
The day before you go for inspection, Disconnect your battery to clear the codes.
If the light doesn't come back on, the mechanic is none the wiser.
That's a great video and very well explained, thank you very much
Excellent video sr. I’m working on.
Thank you. 🎉🎉🎉
I poured Seafoam in the fuel tank, I think it cleaned the entire fuel system, but unfortunately for me it didn't clear out P0420 code. Check engine light keeps coming back. It'll go off for awhile then come back. I'm going try your method next to see if it works.
@@El_Ka69 you say it cleaned the entire fuel system 🤔. If you sprayed it directly into the CAT from the oxygen sensor port, then It would not have gone through your fuel system. It would have gone directly into the exhaust. How did you use the Seafoam?
@@crushrreviewsDid you even read the comment?
@@El_Ka69 oops my apologies. I forgot to click “read more” before responding. Please come back and let us know how it turns out.
Like any thing added to gas tank , laquer thinner is best, 6 gallons gas to one gallon of laquer thinner, then drive 120 or more miles non stop to clean out system thoroughly.
Same issue with my daughters car, I will def try this. Thanks
This definitely worked on my 2017 Honda Accord thanks 🙏🏾
That’s awesome to hear ! Thanks for coming back and sharing your results. Please stay subscribed. Maybe I can help with other repairs.
Did you replace any part? My 2016 Honda accord has the P0420 code I replaced the catalytic converter and it still has the light on.
@@marvxc18 the light will not go away immediately. After changing the cat, you have to drive a couple hundred miles or several cycles before the computer realizes the problem no longer exists and turns off the light. If you’ve already done that, then maybe you have to replace the oxygen sensors. There are videos on RUclips that show you how to test an oxygen sensor. Unfortunately I don’t have a video like that.
Great video with Old School "Let me fix it attitude!
😂Thx for watching !
So you have to spray the inside of the opening hole or outside?
My 2015 HONDA fit same thing the Engine light went on and i stop at the O'reilly for free scan . showing p0420 as everyone in here. i clear the code and put STP treatment in the fuel tank at the gas station aslo fill it full. i wonder will it hard to do the 2015 honda fit. thanks.
Great video. Thanks for sharing your find. I'm going to try this on my Subaru. Subscribed.
Does it work in larger engines I have a 1st Gen 5.3 Ls but according to the instructions on can it says to insert in throttle body while engine is on so just want hour take on this matter should I apply it through o2 sensor or directions on can
@@robertsanchez6998 you should definitely go through the 02 sensor opening if possible, that way you would be putting 100% strength directly into the cat, versus going through the throttle body where the engines combustion would burn it before it has the chance to go through the cat. Hope this makes sense to you. Keep me updated
P0420/P0430 is ALL RELATED TO A PLUGGED CATALYTIC CONVERTER (if you have 4 cats, it will always be the front two closest to the manifold. The front two cats are also metered with your upstream O2 sensor and downstream O2.
My 1997 Ford Ranger 2.3L scan report said, code P0420 Bank 1 so that is that sensor upstream near the engine? Thanks.
@@brownyes6211 yes
@@brownyes6211 bank one is Right side aka passenger side of car. Find the upstream sensor just below the exhaust manifold
Its a 4 cylinder does that matter. Thanks for all your help
@@brownyes6211 4 cyl then you have only 1 bank. Just spray the opening of the upper O2 sensor
@@crushrreviews Thanks.
Where would I insert this in my 2014 Chrysler 300???
@@11ScorpiO95 on your vehicle you will have to go from under the car to see the upstream sensor
Did after doing this did it help with fuel mileage? I’m getting the PO 420 code thinking about doing this cause I’m having very bad gas mileage.
NICE. I have a 2013 Dodge Journey 3.6 it has a catalytic converter in the front and another one under the middle of the car. do you think it will not hurt the under neath converter 02 sensors???
@@NewBayERA it will not hurt the sensors. In my video I only removed the top sensor (upstream sensor) just to have direct access to spray the CAT. I did not remove the bottom one (downstream sensor) It did not harm the sensor.
It would not work resovled. I put seafoam light went off few weeks later come on again. Sound like not help enough.
Sounds like the CAT is shot, but before you go replacing that very expensive part, I would recommend replacing the upstream oxygen sensor.
I’m a firm believer in the seafoam I use it in every thing to fuel oil the booster line. I also have had that rotten egg smell in my cat but did a few treatment of it and has gone a way. I will find out today or tomorrow if it really works after having my emissions done.
@@crushrreviews That what I wonder and thank for recommend. I am going replace when I can
When you are spraying the seafoam into the air sensor slot, does that clean all the banks of the catalytic converter. My air sensor is under my truck. Thanks.
@@brownyes6211 It will clean whatever cat sits below that 02 sensor. If you have 2 banks you will need to remove and clean each cat through the top of both upstream sensors.
@@brownyes6211 remember that it has to go through the hole of the upstream sensor not the downstream sensor. The upstream sensor usually sits below the exhaust manifold just before the CAT
@@crushrreviews Thanks for the information.
@@crushrreviews Thank You.
Hi. I used the Seafoam on my 2020 Hyundai Elantra and the light came back on in about 2 days. my car has 190000 miles on it and I did exactly what you said to do. Is it safe to do add another can of Seafoam to see if that will do the trick? Thank you
@@robertwrightiii you should try driving it hard on the highway to help blow off any loose carbon buildup on the CAT. Also be sure there is no exhaust leak in the area before the downstream sensor. If in several days the light doesn’t clear, you’re probably going to need a new cat. I would also recommend checking that upstream oxygen sensor to be sure it’s working correctly. If not, replace it.
My honda pilot 2013 had the code, the mechanic said they cleaned the mass airflow sensor and charged me 400$. Then the check engine with same code came back four weeks later. It stayed for a week, then disappeared but it keeps coming on and off intermittently. Any tip you can give me? It's about 175k miles
@ give the Seafoam a shot. Can’t hurt to try. You can do it yourself and only spend $10
Buenas tardes es el mismo prosedimiento para una honda crv 2010
Si !
I'm trying it.i did the service with the sea foam and waiting an hour or so.and will start it up..
How did it go?
@1MattDawg420 i guess it didn't work...😢😢😢
does this only work for the bank 2 catalytic converter or does it go through bank 1 catalytic too
@@robertroman55 if you have a bank 2, that’s a separate upstream oxygen sensor. Bank 1 is passenger side of vehicle or right side of engine. Bank 2 is left side of engine or driver side. For each bank, there are two separate oxygen sensors, bank 1 upstream and bank 1 downstream, then bank 2 upstream and bank 2 downstream. So if your code is reading bank 2, then it would be the upstream oxygen sensor on the left side or driver side of the engine that you would have to remove and spray. But it would not hurt to do both bank one and bank two. I hope this makes sense and I’m not confusing you more.
@@robertroman55 check out this link for a diagram.
images.app.goo.gl/Tc3uza4m6mW2SwMH6
I find any Chevy product to be the worst. Absolutely worse for there sensor issues and going off with codes. How do I know? I owned to many. No more and it’s been 10 years and never had an issue with other brands
Also, just curious if your spraying right into the cat and not the motor I would think it doesn't have to be seafoam..it could be brake clean, carb cleaner, etc
Brake clean or carb clean is completely different and fairly quickly evaporates so it would do no good. Seafoam sits there and penetrates the buildup in the cat.
I’m going to try this on my 2016 sonata hybrid - the bendy straw seems to be an important part of this process
I tried this with a bottle of carb cleaner and the short red straw fell into the hole. Took off the bolts on the cat and now i cant find the straw. Weird.
Lol 🤣🤣🤣 shit happens don't smoke before or during
I wouldn't stress that, it will just melt instantly
I had a rough idle caused by opd spark plugs my V6 has 2 cats, current codes are P0300, P0420, P0430. New pligs so runs smoother hoping codes clear in next 100 miles if not I guess I'm trying this in each exhaust half
If nothing else works, it is my understanding that spacers / defoulers on downstream o2 will resolve and get you to pass.
I have two Cats (V6) and 4 sensors! OBDII indicates P0430 (Bank 2).. should I work on Bank 2 and ignore Bank 1?
By the way, if this works, it will save me $1,800.
Thanks.
If the code is indicating bank 2, then I’d concentrate on that one
Seafoam is designed to go directly into the motor. When I remove cylinder heads Seafoam is one of the chemicals I used to clean pistons and cylinders.
It is good for any kind of vehicle and it is good for cleaning catalytic converter also
It’s great for a catalytic converter clean out.
@crushrreviews thxs for the answer i will do it and let you know after that cheap than buying other catalytic
@ I agree. What have you got to lose by trying right?!
@@alainparent5165 so, what happened? there is 4 weeks already, did you try?
@HeydaCarreras it's the pipe on top to the engine connected to the EGR valve was blocked that's why my light code was open but I need to change my cooling sensor cuz the radiator fan starts when vehicle is not warm 🥵🥵 happy new year to you 😄😄
Does the secondary o2 sensor need to come off also?
@@hkarsp00lup31 no it does not, the downstream sensor does not have to come off.
Great it is the first video that really solves the issue. I just have a question: In the monitors (OBD II) does it show as complete? The issue I have is that It does not present a code but in the monitors shows the catalyst as Incomplete. and therefore it does not pass smog. So in you experiment, was the catalyst shown as complete?
You need to literally drive your car a couple hundred miles for the computer to reset it as complete. It will not do it overnight. Good luck
I use the Walmart super-tech brand with the Acetone it does a much job than sea-foam and it’s much cheaper Roughly three bucks a can compared to almost $9 bucks for sea-foam it’s more of a lubricant the Acetone is the primary ingredient in the supertech throttle body cleaner and I have is much effective in desolving carbon buildup and varnish good luck 👍🏽🍀
@@rosieclark3661 thx for sharing 😃👍🏼. You probably just saved some of my watchers a few dollars. Thx again for watching my video.
same brand i use in my fuel injection machine mixed with fuel
The carburator cleaner or parts cleaner? Man this would be my last option, i ve tried everything even removed it and soaked it over night! Def dont want to pay the $2300 for a new cat😩
Can I do this for my 2016 Kia forte? My check engine is on, and this is the code that's coming up.
@@brittneywilliams8851 hi, thanks for watching my video. you absolutely can. It’s not a guaranteed to fix your problem but it’s definitely worth a shot and you run no risk of hurting anything. If you read the comments, you’ll see it has worked for quite a few people. Let us know how it works out for you.
My sons 2021 Forte has the P0420 also I’ll try it I had also thought about using VS7
@ give the Seafoam a shot. Disregard the usage instructions on the bottle. Follow my video instructions for best results.
Rest assured that Cata-Clean DOESN'T DO S**T.
DITTO.. been there; don’t that, I agree 100%.
Agree
It has worked for me. There is a point where your catalytic converters are to far gone and then it won’t work, nothing will.
should i try this on my 2015 VW Passat TDI SE?
@@danielkalanyos9130 you should definitely give it a shot. You’ve got nothing to lose and everything to gain. If you’re not successful at correcting your P0420 with this, you’ll at-least help improve its performance by cleaning the cat. Maybe you’ll get both !! Keep us posted. PS be sure that engine is cool before starting this job.
My P0430 gone with ur help
Just be careful big smoke out
Save money and time
@@jcho649 thanks for coming back to share the results.
When you said you tried the ones that go in your gas tank which ones did you try?
@@gatti1969 I tried Rislone cat complete fuel and exhaust & emission cleaner. I also tried Rislone Hyperfuel. Had no luck with those
I have a 2013 Acura TL SH-AWD V6 can I try this without removing anything? Really on a budget I have a below threshold on bank 2 code.. I’m getting really high $$ estimates hoping I can get some luck to buy me a little time until repairs. My car idles really rough, losing power, & a shaky when I’m at a stop
Sorry for the delayed reply. There are many ways to treat the CAT with a cleaner, but spraying directly as I show in the video gives you better results than the other methods. If you really don’t want to remove anything, try using one of the gas tank treatments like Rislone and then take the car out for a drive and try to drive it hard like one of my viewers mentioned. This should help clean the cat out with forced pressure from acceleration. Hope this helps.
@ Thankyou for getting back to me! I will try & see if it helps
B12 chemtool is half the price and works excellent.
Thanks for sharing, I appreciate your feedback. This channel is all about helping DIYers and your input helps us all. 😃👍🏼
You’re the best. Good work.
Can I use it on my 2018 Chevy Spark
Yes you can
What about using engine degreaser or carb cleaner or brake cleaner?
I wouldn’t recommend that. Could hurt the downstream sensor. The Seafoam is only $10.
@@crushrreviewsdo you think cleaning the 02 sensors would also be ok to do or just stick with original plan?
just did this on my 87 ford f150 with the 5.0L. smokes like a banshee for 15 minutes after starting it back up....white cloud. hopefully this did the trick. I don't have a code for this (ODB1)...the O2 sensor is new (bosch) and was black as soot.
Thanks for watching. Please keep me updated on your results.
@@crushrreviews i have a leaking fuel injector that is the cause of my issue...VERY poor fuel mileage. that will be addressed shortly.
Köszi a videót. Remek és érthető volt. Kipróbálás én is. 😂
Why not just get a can of liquid Sea Foam and dump it into the O2 sensor hole. Gonna do the same thing.
@@billblane7725 someone else suggested that but I tried the spray method and that’s what worked for me.
Seafoam is made to go into the engine in measured quantities. Read the package. Engine and gas.
@@src4409 it will cause no harm to your exhaust trust me. No need to measure quality when spraying directly into the exhaust
I have done it like this many many times and it works
Think the foam work in dodge caravan?Just spray in cataylitic converter an drive it?
Spray into the opening after removing the upstream sensor, let it soak for about 20 minutes, then idle the car for about 10 minutes or so until the smoke dissipates. When smoking out the exhaust, idle the car at about 1500 RPM. It will help heat up the exhaust and burn out the residual Seafoam.
No need to drive the car, just follow the steps above.
I will do this because what do I have to lose if I dont. thanks man!
@@TheMAC0876 a $20 investment is worth a shot before spending a few hundred on a new CAT
@@crushrreviews it sure is
do you have to reset the thing with that device before you test drive it ) or will engine light eventually go off by itself after you drive +/- 100 miles ?
You can reset it if you want to, but the computer will erase the code and turn off the light on its own after a few drive cycles where the problem is not present
Thank you sir, it really works 💪🏼
I got a 2014 Honda accord sport with the P0420 error code. I am going to replace the censors AND I am going to use thi magic Seafoam. Not idea this was around. Thanks for this video. I just subscribed
I would do the Seafoam cleaning before replacing the sensors. In that order.
@@crushrreviews thanks…. Well, I just bought them all. Trying the foam now. It is fine, compared with the ripoff from Honda, $300 is nothing from autozone. My motor vehicle inspection is due next month. Thanks a lot for your help. Without you, I wouldn’t have saved soooo much
@@franklincarreno8668 keep us posted on the results
@@franklincarreno8668how’d it go?
You have to check the monitors in order to confirm the fix.
In the video linked below I show the monitors after the cleaning
ruclips.net/video/MHFabgEIn7s/видео.htmlsi=QpGZPDirA1jjdMHk
Be careful where you put dielectric grease or any kind...because the O2SEN needs ambient air to function. Air is drawn in through the wire harness for comparison to oxygen in the exhaust.......I'm not sure if it applies to A/F SENSORS....BUT IT DOES WITH. ZIRCONIA SENSORS
Seems like you should have used the black piece on the straw?
The black piece is actually made to be used on your intake manifold, That's why it shaped like it is It helps direct the straw from the seafoam can directly into the Intake past the sensors so it doesn't damage them in the process.
Hi will this work on a 2016 Ford edge p4030 code?
@@PathToPeaceMoe that would be a code for bank 2. Definitely worth a try. if it persists after the cleaning, try replacing the upstream sensor on that bank
So spray the seafoam from the same place you had from the upstream oxygen sensor
@ yes spray through the opening after removing the upstream sensor.
@@crushrreviews didn't work code came back next day
One of my previous high mileage cars has this code occasionally. I reset the code then notice that the code doesn't return until after refueling at Costco Wholesale gas station.
That’s odd. I can’t see how gas from Costco would cause it to come on. That could simply just be pure coincidence. Definitely puzzling.
My check engine light just came on after the first time I filled up on cotco gas
P0420
Your monitors only run with a specific amount of fuel in the tank. Costco fuel has nothing to do with it.
Costco gas made my car run like shit
About to do this now waitiing for it to soak up
Did it and notice the difference right away! the car has more torque. I think I will do it again considering I own a 17 year old mdx
Seafoam actually works in the oil, gas, ( & obviously in the exhaust too) says so right on the can.... Seafoam is great stuff. I had old gas in my Harley. I drained as much out of the tank as I could, by siphoning, since I didn't want to remove the tank. I was told by Seafoam to add a can of Seafoam to the tank with a gallon of fresh gas.... It worked great, cleaned up the fuel pump, injectors, hoses & lines, & any residual old gas & varnish!
@@donwendling7800 thanks for sharing. I didn’t know it could be used to clear out old gas. Will keep in mind for future needs.
Damn.. that’s badass
can we try with dishsoap and water and let it run ?
WTF! Dont be cheap! The answer is NO!
@@LOLONO666 Hi there, I don’t think it would be as effective. I know people have removed the catalytic converter and soaked it in soapy water several hours, but as far as treating it with soap & water while still installed, I don’t think it would be effective. Save yourself the trouble and use the Seafoam, you’ll have much better results.
Would i be able to spray it through the throttle body and get the same results
@@toontoonjr. I wouldn’t recommend that since you have to spray nearly an entire can through there. Also you want to spray that directly onto the CAT for best effectiveness.
I would say no as the cylinder combustion would burn Off the sea foam into a gas before it reach the cat.
did the P0420 code leave ? why didn't you show that . Without that information I could still fail inspection. i say that because the check engine light could leave but the code will still be in the CPU or not Sync up, it will still have an X and not a check Mark next to the cal code for newer cars . wish you would have shown that . needed to see that before i do a 4 day test . other then that good Vid
@@KESSTHEMC you’re right ! I should have done the re-scan afterwards. My code was gone because it was a pending code, it had not become a permanent DTC yet. Unfortunately Permanent DTCs cannot be cleared with an ordinary OBD scanner. If your code is permanent, the problem would have to be corrected and the car has to go through about 10 normal drive cycles before the ECM clears the permanent code automatically.