P0420 chevy cobalt 2006

Best option: https://repairpal.com/repair-shops Good luck!

This ‘may’ help explain: https://www.engine-codes.com/p0420_chevrolet.html

Well by bank 2 I mean the O2 after the cat. So the cat is bad? So if I use a laser thermo reader it should be very hot before the cat and after a lot cooler and if its hot after that means the cat is bad correct I do have an exhaust leak but not for another like two feet after the second o2 sensor

Typically PO420 is a very good indicator the cat has indeed failed.. Take a look at this video: https://youtu.be/wcDPAfz10Io