P0401 & P0404 [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: P0401 & P0404


buckshot1224
01-27-2010, 02:03 PM
Mods are in sig......

Soft codes found with a friends EFI.

What needs to be done? Block and Stick? I was thinking these codes shouldn't show right now........

Randy_the_Hack
01-27-2010, 02:50 PM
Depends. Do you have a CEL? Is your truck an FE9? If you don't have a CEL and you do have an FE9, you can just block it... no need for a finger stick.