Fix P0401 Code (EGR Flow Insufficient) | Expert DIY Repair Tips

Got a P0401 engine code showing up on your scanner? That means your car’s EGR system has insufficient flow, and if left unchecked, it can lead to poor performance, higher emissions, and failed inspections. In this video, I’ll walk you through exactly how to diagnose and fix the P0401 code like a pro — right from your own garage. We’ll cover how the EGR system works, common causes like clogged passages, faulty EGR valves, or vacuum issues, and expert tips on cleaning or replacing components. Whether you drive a Honda, Ford, Toyota, or any vehicle with an EGR system, this guide will help you get that check engine light off and your engine running smooth again. 🛠️ Found this guide helpful? Subscribe for more expert-level DIY car repairs, diagnostic tips, and troubleshooting videos every week. Got questions about your P0401 code? Drop them in the comments — I’m here to help you fix it right the first time!