Posts Tagged: cataytic converter

Step by Step Guide to diagnose a P0420 or P0430 code

Learn how to diagnose a P0420 or P0430 code to confirm or deny the converter is bad When your vehicle throws a P0420 or P0430 code, it’s telling you there’s a problem with the catalytic converter’s efficiency. These codes translate to “Catalyst System Efficiency Below Threshold” for Bank 1 or Bank 2. While a failed catalytic converter is often the issue, don’t rush to replace it just yet. In this article, I give you a step-by-step diagnostic guide to professionally diagnose whether the catalytic converter code means you have a … Read More