Dtc P0401

SwampAss

Member
:
2007 Mazdaspeed3
Insufficient EGR Flow. Anyone have this DTC yet? I cleared it and will wait to see if it comes back. My car will sometimes stumble right off idle when cold. It does it once, then drives fine. May or may not be related.
 
It doesn't really get a chance to idle rough. The idle dips to the point where it almost stalls and then is back to normal.
 
no im talking normally. becuase on the fs motor when the egr is clogged the car will start ideling rough
 

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