This thing has two catalytic converters. What is it that could go wrong inside one of these things that putting cata-clean or something else cannot clean out and fix. Getting the code po420. I do not understand what about this thing could actually go bad.
This thing has two catalytic converters. What is it that could go wrong inside one of these things that putting cata-clean or something else cannot clean out and fix. Getting the code po420. I do not understand what about this thing could actually go bad.
- J L., Irving, TX, US