Q: I have a 2010 Honda CR-V. Last month its check engine light came on. I’m a retired mechanic and, using my diagnostic scanner, found a trouble code of P0420, which indicates an issue with catalytic ...

The catalytic converter is undeniably an essential part of a vehicle. The converter has an effect on the performance of your vehicle, and it reduces tailpipe emissions. Without an effective converter, ...

Q: I have a 2010 Honda CR-V. Last month its check engine light came on. I'm a retired mechanic and my scanner found code P0420 — catalytic converter efficiency. I tried a catalytic converter cleaner.

While catalytic converters regularly appear on the news as increasingly-targeted stolen items, they're an important part in vehicles. For those who aren't gearheads or auto enthusiasts, the primary ...