P0401
#5
A code P0401 most likely means one or more of the following has happened:
* The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (tube), most likely carbon buildup
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum
* The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (tube), most likely carbon buildup
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum
#8
So they said it is the EGR valve. They are replacing it and all should be well again. I asked what the price would be normally and it is $99 for the part and 1.5 hours in labor. So an EGR valve replacement would normally cost around $330 at the dealer with a bit of a discount for the insurance company. I'm guessing it would be around $350 or so for the average person.
I also had them inspect the cooling system. I regularly get a film on the inside of the windshield and my coolant level drops some. I thought maybe I had a heater core issue. They said the system all looks ok. Apparently, the dash has a chemical in it that off gasses and causes the film. It is a TSB from what she said. And the coolant level dropping is normal. They (Mazda engines) seem to do this and you just top them off.
Yay, now I can put my tune back on the car!
I also had them inspect the cooling system. I regularly get a film on the inside of the windshield and my coolant level drops some. I thought maybe I had a heater core issue. They said the system all looks ok. Apparently, the dash has a chemical in it that off gasses and causes the film. It is a TSB from what she said. And the coolant level dropping is normal. They (Mazda engines) seem to do this and you just top them off.
Yay, now I can put my tune back on the car!
Last edited by Aubrey; 07-03-2010 at 06:09 PM.