fcc

I have found out that the P0420 and P0430 codes typically have to do with a catalytic converter gasket leak. I had the P0430 code and made the mistake of taking it to the dealer. Of course, I was told to replace them both for $2,600 plus tax. The dealer charged close to $100 plus tax as a diagnosis fee. I went to Midas and God bless the good folk out there who determined the code to be a gasket leak. The gasket was replaced for under $100 plus tax. I hope this helps anyone who gets these codes.