(12 pack) Dura Lube Catalytic & Exhaust System Treatment Emissions Additive Automotive Converter Cleaner 16oz

Cleans the entire fuel system including O2 sensors and the catalytic converters. Good product if you use it BEFORE you have problems. Probably won't clean a heavily dirty converter. I use it once a year on both my high mileage vehicles and have never had any converter problems.

Ive been using this for over 2 years and spent more money on this item than I'd like to admit. I have a 2017 Hyundai Elantra 2.0L. check engine light came on 2 years ago P0420. around 115,000 miles. I have used this every 3 months for the last 2 years. I have replaced my canister purge valve, O2 sensors, spark plugs and coils. I'm currently at 159,000 miles. The light still continues to come on from time to time and I just shut it off using my obd2. then I go and buy bottle and put it in and I'm good to go for a bit. I live in Pennsylvania and we have to get our car inspected every year. I've passed 2023, 24 %26 25 using this. After you put this in your full gas tank, your light will turn off on its own after driving a bit. I drive a lot on the turnpike and when my light is on, it puts me on edge which is why I shut mine off after checking to make sure it's still the same p0420 code. obviously in my case, it's not fixing the problem, just prolonging the inevitable. Replacing a catalytic converter can cost two grand So it's worth spending 20 bucks to try it out. Even if your light doesn't come on, it's still a good option for preventative care.