MotorPower Care Catalytic Converter Cleaner 2-Pack — Pass Smog & Emissions Test, Fix P0420/P0430 Check Engine Light | O2 Sensor & EGR Cleaner | Fuel Additive, 8.45 fl oz Each

I tried DuraLube, Cataclean, and this. Not just on my daughter's car but she had 2 friends all get P0420/430 codes in 3 months of each other. Out of all the products this was the best one. It may not work for everyone, but it worked great for me. DuraLube got check engine light off for 800 miles, Cataclean fir maybe 300 miles. The I used this and now still going with light off for 4k miles.

bought a new (to me) car and was told cats needed to be replaced. the first thing I tried was cataclean, didn't work. next I tried some other autozone cat cleaner and it still didn't work. I searched here on amazon for catalytic converter cleaner, found this and dumped both bottles into my nearly empty gas tank. did my usual hot soak, involving running high RPMs on the freeway then let the car sit overnight. filled up my tank with gas the next day (mixing it with the 2 bottles of this stuff) and proceeded to drive as usual until the tank was empty. just today on my way to class I noticed my check engine light was off and upon scanning for codes i discovered both my P0420 and P0430 codes have gone away. now this is great but I will give it another week to see if the codes return, but as of right now this stuff is gold. I recommend.

I have used this product about 1 1l2 to 2 years ago. The product worked after 2 applications at that time. It took a day or too to reset. I have not had my check engine come back on until last week. I did the first application and in 2 days the check engine light is off. This product does work wonders and will be my only go to product!!

After using this product, the car's power improved somewhat. However, the check engine light hasn't gone out; it might be due to another issue.

IT WORKS!!! My check engine light was on and wouldn't pass smog, the tech told me it was probably the catalytic converter. I have an older car and the repair cost more than what the car is worth. I ran two cycles back to back with about 7 gallons of gas each. After that, I disconnected the battery for about 30 minutes to clear the check engine light. Once the code is clear you gotta make sure all the sensors start working again with what's called a obdII drive cycle, mine were stubborn and took about 200 miles to get back on. Once the the sensors started working again, I took it back to the smog shop and it passed no issues. If you're having issues with your OBDII sensors this is definitely worth a shot before other costly repairs.

I have used this several times for a dirty catalytic converter being clogged causing a trouble light. Works quickly and lasting results.

appears to work

Purchased a used car and it had the P0420 (yeah not as fun as it sounds) code for a bad or failing catalytic converter. Thought I would try this BEFORE spending $400 on a replacement and DAMN I'm glad I did. Took 24hrs and about 60 miles for the check engine light to turn off on its own. Took the car to get the smog certificate and it passed. I and going to try the other solution they sell to see if it cleans it out a bit more. Follow the instructions and it should work, UNLESS the cat is melted and cracked.

Reasonable price for the quality, the content can be mixed with 1 fuel tank it is much easier to use compared than others that need to be mixed with quarter tank and driven to 50 miles.

VALUE FOR THE MONEY , The most easiest and SAFEST Way to CLEAN YOUR ENTITE Fuel System ONCE and DONE!

Easy to use. Need some indicator of success. Need more information to know if I should continue to use more than 1