Got a P0420 code? A failing catalytic converter is something that you won't typically feel, but you will get a check engine light for it! If this has happened to you, Andy is here to answer the common questions about catalytic converters, and what you can do to replace yours. This is one where some time spent diagnosing the problem will point you to exactly what parts you need! Check out 1AAuto.com for anything you need for your car or truck! | 1A Auto Parts