Zak is new to the CarBuzz team, working as a freelance content writer. When Zak isn't writing How To articles for CarBuzz he's working as a high school automotive technology instructor. Before ...

As an experienced service advisor, I saw the P0420 “check engine” light code hundreds of times. This fault code indicates that your car’s catalyst system isn’t performing as efficiently as it should.

As an automotive professional, there is nothing that gets me more riled up than a "quick fix" or "mechanic in a bottle." I have found with my years in this industry; there are seldom repairs that can ...

The P0420 (whose official onboard diagnostic definition is ‘Catalyst System Efficiency Below Threshold’) code is a sign that a vehicle’s catalytic converter is subject to one or more problems. Such ...

If I were to take a poll with Prius owners, I would bet that most of them have encountered at least one trouble code in their car. There are millions of Gen 1, 2, and 3 on the road without warranty, ...

In this video, I will show an easy and cheap fix for Codes P0420 or P0430 Catalyst Efficiency Below Threshold on banks 1 or 2. MILWAUKEE'S Electric Tools MLW48-22-9415 Combination Wrench Set - SAE htt ...

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