EGR code

red1977 · May 10, 2013

I have a 2001 dirty. It keeps throwing a p0400 code for the egr. This truck has never had a EGR. Why would it throw this code?

chevyburnout1 · May 10, 2013

P0400 isn't a legit code for that year Duramax. Need to scan it again, possibly with a better scanner.

red1977 · May 10, 2013

That was scanned with a v2

bluecollar · May 10, 2013

Possibly wrong os?? Tuned??

red1977 · May 10, 2013

Same os number I have been using from day one.

Ridin'GMC · May 10, 2013

Are you sure it does not have the California emissions?