You don't need an expensive professional technician level scan tool (that cost around $2K to $5K ). TIP 1: A scan tool with Live Data capability is a must, to test diagnostic trouble codes P0172 and P0175. I'll also offer you a testing strategy to find the root cause of them.Īlthough you can apply this info to any Ford vehicle with a V6 or V8, this info concentrates on the Ford 4.6L and 5.4L V8 engines. I'll go into the basics of what these trouble codes mean and how to confirm that there really is something causing the PCM to set these codes. This tutorial will help you to diagnose diagnostic trouble codes P0172 (System too Rich Bank 1) and/or P0175 (System too Rich Bank 2).
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