P0401 code fix

MIKE MAREI

MEMBER
2008 CHEVROLET UPLANDER
200,000 MILES

I drove it fine the next day I heard noise then the engine light came on code number p0401?

Friday, March 16th, 2012 AT 1:28 PM

1 Reply

BORIS K

MECHANIC
756 POSTS

Hello,

P0401 relates to insufficient flow from EGR valve. This can be caused by a faulty EGR valve or a blocked EGR passage from the valve to the inlet manifold.

How to access and clean the EGR passages in the inlet manifold.

https://youtu.be/Xh9ieHEfUB4

See picture below how the EGR valve looks like.

Please let us know how you get along.

Cheers, Boris

Image (Click to make bigger)