Mazda Millenia 1996
numbers coming up are:
301 - saying it’s misfiring piston #1 easy fix but this has happened twice in a year 1/2 any reason why this would keep happening?
400 & 402 -
but the EGR Valve looks good to my mechanic & the tube or pipe (?) to it is clean too.
any idea on what else could be in the way of the EGR Valve flow?