P0401/P0404 DTC's [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: P0401/P0404 DTC's


drlvegas
04-22-2005, 07:10 PM
I reprogrammed today & got these. Anyone know what they are?

dmaxalliTech
04-22-2005, 07:12 PM
I assume you have no kitty? If so, they are EGR codes and its nothing a fingerstick wont take care off.

drlvegas
04-22-2005, 07:57 PM
Kitty's still there--Banks cat-back is all I have for an exhaust. Maybe it needs to go for a trip to the dealer. Also, if there's something wrong in the EGR arena, could that be causing high EGT's??

Thanks

WiKD1
04-22-2005, 09:17 PM
The code you are getting are related to the egr function caused by the reduced back pressure from your aftermarket exhaust system. By a finger stick or a PPE egr code buster.....

05LLY2500HD
04-22-2005, 09:21 PM
Predator says: P0401........... EGR flow, insuffecient detected

P0404............ EGR circuit Range/Performance

I got two others as well
They are:
P0405........EGR sensor A circuit low
P1404........EGR system valve 2


Finger stick is takin care of em.

LBZ DMAX
04-22-2005, 09:39 PM
I ran with the banks cat back for about a month and never set any check engine light. Once I added the MBRP front pipe (bye-bye kitty), within 10 minutes set off check engine light with a list of codes!:eek: ):h

drlvegas
04-22-2005, 10:13 PM
Where to get a finger stick?? Also, what is it--I've seen a number of posts, but I'm clueless.

05LLY2500HD
04-22-2005, 11:07 PM
Where to get a finger stick?? Also, what is it--I've seen a number of posts, but I'm clueless."Fingers" is a member here , he makes them. $25 I think. 30 minutes or less or your time to install, and some decent size b*lls to cut into your wiring harness, and your set. Very simple and it works.

Fingers
04-23-2005, 10:32 PM
Info at http://dieselplace.com/forum/showthread.php?t=21428

ssduramax
04-23-2005, 10:58 PM
yup, the finger stick works like a charm! Installed mine today finally. it took care of the codes from the EGR blocker plate i installed a couple weeks ago.