A common emissions code seen in the field, a P0420 trouble code indicates that the catalytic converter isn’t functioning efficiently. To work at peak efficiency, the emissions or feed gases entering the catalytic converter need to be perfectly balanced and not excessively elevated. To resolve the...
I have a AP200 and got a P0420 code, I am going to try two tricks one after the other to try to fix it: 1 - clean the cat via "Liqui Moly Catalytic Converter Cleaner", even if it does not fix the problem the cat probably needs cleaning 2 - use a spacer but how do I clear...