Solving my car's BIGGEST mystery. EGR problem/diagnostics | Engine code P0401

Hey everyone! So in this video I discuss a mystery about the EGR system and how I solved it. I had the engine code P0401. I originally fixed it by cleaning out the EGR system, Replaced the valve, and cleaned out the intake. A couple of months later, it came back on and it wasn't as simple like last time. I hope this video helps some of you out. Thanks for checking out this video! Don't forget to like and subscribe! EGR valve for 2000 mazda miata: https://www.rockauto.com/en/catalog/m... Music: Mystic Musician: Jeff Kaale #cars #miata #mazda #machanic #egr #checkenginelight