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The Best Catalytic Converter Cleaner

The Best Catalytic Converter Cleaner

You’ve been told that your vehicle needs a new catalytic converter? Well, if your check engine light is on, and if you hook up a scan tool and it says Pio 420 catalyst efficiency ball threshold, then the odds are you have a problem with your catalytic converter.

The Best Catalytic Converter Cleaner of February 2024 – Reviews and Comparison

SaleRank No. #1
DURA LUBE Severe Catalytic and Exhaust Treatment Emissions Test Catalytic Cleaner 16 fl. oz, 1 Pack, HL-402409
  • Use when warning light is activated
  • Use before or prior to replacing catalytic converter
  • Protects catalytic system from oil poisons
  • Reduces phosphorus and zinc retention levels at catalyst inlet
  • Lowers tail pipe emissions
Rank No. #2
Cataclean 120007 Complete Engine, Fuel and Exhaust System Cleaner, 473 Milliliter
  • Using Cataclean can lower your total hydrocarbon emissions by up to 50 percent
  • Reduces carbon build-up in catalytic converter, oxygen sensors, fuel injectors and cylinder heads which results in improved fuel efficiency
  • Improves overall vehicle performance-including driveability issues such as power reduction, hesitation, rough idle, hard starts and lost fuel economy
  • Safe for gasoline, diesel, hybrid and flex-fuel vehicles; does not alter fuel
  • Not for use in 2-stroke or oil / gas mix engines
Rank No. #3
Cataclean 120019 Cataclean - The Original Liquid Science - Complete Engine, Fuel & Exhaust System Cleaner
  • Restores Catalytic Converter, Oxygen Sensors, Fuel Injectors and cylinder heads
  • EPA Approved
  • Easy to use -Simply pop, pour and go every 3 months
  • Original long nose bottle which is capless gas tank compatible
  • Does not alter fuel composition and is safe for gasoline, diesel and Hybrid engines
Rank No. #4
Cataclean 120018CAT Cataclean Fuel And Exhaust System Cleaner Special Formula For Use w/Gasoline Engines 3 Liters Cataclean Fuel And Exhaust System Cleaner
  • Restores, maintains & helps protect the catalytic converter, oxygen sensors, fuel injectors, and cylinder heads
  • 3L packaging – Treats up to 30 gallons of fuel
  • Packaging versions to cater to Gasoline, Diesel, and Marine markets
  • Safe for gasoline, E10, E15, and E85 fuels
  • Does not alter fuel composition
SaleRank No. #5
Catalytic Converter Cleaner for Car Engine Cleaner Powerful Booster Cleaner Oxygen Sensor The Fuel Injectors Cylinder Heads Cleaning Agent (3Pcs)
  • If you ever notice your fuel economy decrease noticeably or a rotten eggs smell is coming from your engine, then you need to clean the catalytic converter right away!Deeply clean your converter with Catalytic Converter Cleaner without removing it! Stop the dreaded “service engine” light flashing up on your display, and get better engine performance!
  • LOWER EMISSION LEVELS: can lower your total hydrocarbon emissions by up to 50 percent.Let you easily pass the vehicle emissions test, while better protection of the environment.
  • BETTER ENGINE PERFORMANCE: help clean the fuel injection system, as well as the cylinders, improving overall performance.
  • REDUCE FUEL CONSUMPTION & BAD SMELL: while cutting down on fuel consumption, it also gets rid of the icky smell developed by your car overtime.
  • PROTECT ENGINE: Proper fuel and exhaust flow will keep that engine running cleaner, smoother, and better, which will also cut down on maintenance costs.
SaleRank No. #6
OXICAT Oxygen Sensor & Catalytic Converter Cleaner
  • Safe and effective for all petrol (gasoline)and diesel vehicles
  • Engineered to clean the entire exhaust system WITH REGULAR USE.
  • OXICAT is activated when the catalytic converter reaches its required working temperature.
  • Proven safe and effective by the Pros, now available in North America. TUV certified, made in Germany
SaleRank No. #7
Liqui Moly 2030 Pro-Line Fuel System Cleaner, 500 ml
  • Package Dimension : 2.24 " L x 2.24 " W x 7.96 " H
  • Country of Origin: GERMANY
  • Model Number : 2030
  • Item Package Weight : 0.9 pounds
Rank No. #8
Liqui Moly 8931 Catalytic-System Cleaner
  • Special combination of additives for cleaning and removal of sediments and typical impurities in the intake system and combustion
  • Catalytic-system
  • Item Package Weight: 0.299 kg
  • Item Package Dimension: 17.6cm L x 5.0cm W x 5.0cm H
Rank No. #9
Motorkote Catalytic and Exhaust Treatment Emissions Control Catalytic Cleaner, MK-10351, 16 fl. oz, 1 Pack, Emissions Test
  • Use when warning light is activated
  • Use before or prior to replacing catalytic converter
  • Protects catalytic system from oil poisons
  • Reduces phosphorus and zinc retention levels at catalyst inlet
  • Helps clean oxygen ( O2 ) sensor(s), lowers tail pipe emissions, works great for P0420 Catalytic Converter Code
SaleRank No. #10
Chevron Techron Concentrate Plus Fuel System Cleaner - 20 oz.
  • Cleans, restores, protects the entire fuel system (fuel injectors, carburetors, intake valves and combustion chambers)
  • Restores: Lost power, acceleration, lost fuel economy, and operation of the fuel gauge sensor
  • Reduces: Rough idle, engine surge, hesitation, and spark plus fouling
  • Improves: Cold start performance, and fuel stability for up to one year

Last update on 2021-07-28 / Affiliate links / Images from Amazon Product Advertising API

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But before you replace that really expensive part, you might try cleaning it out first because when that inefficient catalyst code pops up, it can come up. When you only lose 5% of its efficiency, the converter could still be working at 94% efficiency and it will trip the code. So a little clean and can often fix them. Now there’s tons of cleaners out there, but I’ve had great luck using pure lacquer thinner over the last 30 years, when the gas tank is half full, I put a gallon of lacquer thinner in the gas tank.

Then I tell the customer, drive the car 150 miles or so at higher speeds, where I run the engine at about 2,500 RPMs for about 30 minutes to run the cleaner through. And this can burn the impurities out of the cattle of the converter and make it work again. Now, if that doesn’t work, there’s another solution besides replacing the cat. But most people won’t like it because this requires removing the catalytic converter crawling under the car and pulling it off as they often get so hot, they practically weld themselves on that can be a real job, but it can be done. Now, once you get the cat off, get a bucket, put some laundry detergent soap in it and foam it off.

Then get your catalytic converter and throw it in the solution. Then let it soak overnight to remove all the crud that’s inside it. Now you might think this is kind of a crazy thing to do, but when you find out that some catalytic converters cost over a thousand dollars, you might try a little cleaning. As you can see, by looking inside this catalytic converter, there’s all kinds of little honeycomb shapes. They clog up really easy and cleaning will often make them open and work again. And of course, taking a catalytic converter part and clean it, it works the best, but it’s such a hassle. I advise most people to try the cleaner first because pouring it a little cleaner and driving at 150 miles will often turn that engine light off and fix the converter problem. And that’s, you’re a hell of a lot better than buying an expensive new catalytic converter.

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all right so we’ve got some little special for you today something a little bit different actually and this is a tool that is not sponsored first of all something I wanted I’m going to show you why I wanted it this is something everybody wants to buy but most people don’t so today we’re gonna be using this tool to Specter catalytic converters alright so I don’t really have any kind of stand in this little shop anymore to put my camera on so we’re just gonna kind of have to wing it now

I get this off Amazon I put a link below even though like I said it’s not sponsored we’re just doing well if this company isn’t total junk well Duma will do them a solid if not well tell them all about it and this is from any kit you know he freaking knows he’s got the China stamp of approval yes it does all right there all right gotta have that hello focus focus focus they’re interesting so I almost got one will or something fell out hang on to that it’s all in Chinese like everything you buy is gonna be in Chinese that’s to pay like $2,000 for it right so I’m just curious to see so there’s a little canister with those little rings in it come on camera

what are you even doing here there you go mini-usb and then here is the main unit now like I said you kid got want to hook up to your phone but I kind of wanted this so it does it’s supposed to take a SD card things heavy man I’m supposed to be able to record no no we’re going to be able to inspect in here okay so got turned on here this is looking at it it does have SD card in it has a 16 gig SD card in it and it has a charge point are you gonna focus or what’s what’s even the situation here you gotta focus this is new cameras oh geez there it is so 16 gig and this has a rechargeable battery that charges off that cord alright okay so the reason

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why I got this one see how small this end is and you could actually get different ends for it and what the hell I don’t know there we go so it’s easily small enough to fit in a spark plug hole or go down into your sauce and it’s not a large diameter so we already got the screen on here this supposed to be like the fullest h HD image you get but who knows it looks good so we got a light on top that turns light on this we’re gonna to figure out

how to turn the light on that okay so right here is a light button we’re gonna go ahead and turn that on every our got three different settings you got all your record button right there you never gonna leave these honor because if you leave those honor too long that adhesives hard to get off the quale does look good and real shoot us a video of herself I mean it’s not bad don’t know if it’s quite what they’re saying it was uh that’s pretty decent pretty decent

so all right well let’s pull the oxygen sensor out of this car I think these are a real pain in the butt now these are easy the back ones paying the but the front ones easy well shift this tank over a little bit we’re gonna pull the oxygen sensor out and we’re gonna see and the whole reason why I bought this I suspect the catalytic converters in this car stopped up and that’s what’s causing Revital in the throttle because there is no other issue right it just dies out and sounds like the valve trains kind of fluttering at top in weird but this one also the e39 will be looking that in the future and we have.

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Fabian Walker

Data Scientist, Lab Researcher, Founder of