i drove it fine the next day I heard noise then the engine light came on code number p0401?
Mar 16, 2012 at 1:28 PM
p0401 code fix
2008 CHEVROLET UPLANDER
MIKE MAREI
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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
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 enlarge)
Oct 12, 2021 at 9:04 AM