Question about 2004 Mazda 6
P0401 means you have insufficient egr flow, what you will have to do is have the egr ports cleaned out. this will involve removal of the egr valve so it would be best to take it to your local dealer where they will be able to fix ya right up.
Posted on Aug 12, 2009
I have a plymouth breeze.
Trying to get a state inspection and code P0134 and P0401 came up. I am disabled and on a limited income. I cannot pay a high repair bill and do know a little about working on auto's (Dad's little tag along and helper which gave me the will to do work on my autos often) Anyway, need to find out if I could fix these and what steps should I take. I am wondering if I possibly pulled the exhaust system loose when turning into a drive that had major erosion and it scraped hard under my car. Would that have possibly caused part of this. I have not checked under the car yet.
Posted on Oct 02, 2009
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Posted on Jan 02, 2017
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In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.
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