If you ever notice your fuel economy decrease noticeably or a rotten egg smell is coming from your engine, then you need to clean the catalytic converter right away. There are many reputable catalytic converter cleaners available on the market. Below are the top 10 cleaners that are most often recommended.
#1 – Cataclean Engine and Catalytic Converter Cleaner
The 16 oz. bottle of Cataclean is one of the best products you can use to clean your catalytic converter and oxygen sensors. Although it is not cheap, the cleaner has a good reputation of clearing various catalytic converter codes from your ECU.
If you need to take an emissions test and you need to quickly clean your catalytic converter and fuel system, this is probably your best bet.
2 – CRC “Guaranteed to Pass” Emissions System Formula
The CRC “Guaranteed to Pass” formula actually offers a double money-back guarantee so the company stands behind their product. This solution will remove carbon from your engine, catalytic converter, and fuel injectors.
It’s been used many times to successfully treat a P0420 fault code. Good to use to increase your chances of passing an upcoming smog test. Recommended to use every 3,000 miles.