The short answer is no. Using one of these products likely results in ameliorated symptoms, mainly because they contain additives that will clean carbon deposits from your engine's fuel and exhaust systems. Mind you, they won't completely eliminate them or magically repair your damaged catalytic converter.

Can you clean a catalytic converter instead of replacing?

As we indicated at the beginning of this article, cleaning a catalytic converter is not recommended by any vehicle manufacturer. It can damage the internal catalyst and render this mandated system useless. The best solution is to have a professional mechanic replace the catalytic converter.

What is the most effective catalytic converter cleaner?

Cataclean Complete Engine, Fuel and Exhaust System Cleaner

Gasket is the best of the best. Simply pour the Cataclean solution into your fuel tank and let it go to work! This product reduces carbon buildup in your catalytic converter, oxygen sensors, cylinder heads, and fuel injectors.