Exhaust gas recirculation flow malfunction, Mazda 626

Question

My check engine light came on and it said code PO400 exhaust gas recirculation flow malfunction. I have a 2001 Mazda 626, 6 cylinder. I was told by a mechanic (who knew nothing more than that code) that I needed to replace the egr valve. I have someone willing to do this for me, but I've heard that sometimes it's not the valve, but other components of the exhaust system that makes this code appear. The part is 361 dollars, so it would really s***w me if this wasn't the problem. Any ideas or suggestions??

Thank you guys so much!

Answer 1

Thats about the right price for an egr valve for that model. Most likely thats the problem but if your short of money id get a second opinion just to make sure.

Answer 2

it is likely that it is the egr valve but $361 for an egr valve? sounds excessive but sometimes you can just clean them out with some carb cleaner and a screwdriver