Catalytic Converter Cleaner Pass Emissions Test Cleans Catalyst, Oxygen sensor and combustion chamber cleaner, fuel additive

My husband put a can in around 9 am at 3 pm I left in the car and the check engine light was no longer on!

Passed Smog Well Below the Required Threshold. I followed the instructions to the T …Very Satisfied

It works but, if the the converter is clogged bad, it’ll break up the particles and shoot it all over the O2 sensor. It may take more than one bottle but it works. Notable increase in performance….right before a jig saw. ☺️

Bad coil on a 1999 V6 Toyota Solara coupe with 235,000 miles caused check engine light to come on (occasionally flashing) and engine to run rough for months. P0300 "multiple misfire" OBD code. Got progressively worse. Finally replaced the coil cuz a smog check was required for upcoming registration. Replacing the coil fixed the issue. Engine runs great. Check engine light was reset and did not come back, but smog check failed.Used this with 1/4 tank and drove til nearly empty to get rid of as much additive as possible, then added half a tank of top tier premium and drove for 1 hour.Passed smog by a wide margin.I can't confirm this product actually did anything, maybe the car just needed to be driven hard to clear out the carbon but you can't argue with the result!Oh yeah, recommended to a friend with a Kia mini van that wouldn't pass smog and also had a check engine light. Same procedure worked for him too.

Check engine light was on and code indicated it was catalytic converter/O2 sensor issue. Purchased this, hoping it would resolve the problem and will behold took care of the issue, but only briefly as check engine light returned

Average

Successfully passed... todayIf you want to get rid of a P0420 code, you should first check that your exhaust pipe is still good. That's the only way it'll work。It can indeed improve low oxygen levels caused by incomplete combustion

I used two bottles. One with each 22 gallon fill up. I bought my Nissan 2005 Maxima with the check engine light on, 9 years ago. According to the emissions test, it needs both catalytic convertors replaced. Yet, in 9 years I haven't had to because every 2 years I add this to my tank, 2 weeks prior to going to get the car checked and it passes. Now, instead of regular gas, I use premium in conjunction to using this stuff. If you don't pass the emissions test in Illinois, your plates are NOT renewed. It worked. The check engine disappeared and I passed. The light came back on today, but I passed and already have my MAY 2026 plate sticker. IT WORKS!!