code p0401??????? - TheDieselGarage.com
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post #1 of 6 (permalink) Old 03-29-2009, 08:21 PM Thread Starter
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code p0401???????

my dad has an 06 gmc duramax with the basics, intake, exhaust and a bully dog triple dog downloader with crazy larry and his check engine light has come on for the seconed time both times the same code p0401 unknown DTC. anyone know this code he hates the dealer so he was hoping you guys might have the scoops on this one..
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post #2 of 6 (permalink) Old 03-29-2009, 10:32 PM
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You can find all the DTC codes at this link.
GM Diagnostic Trouble Code List part 1

P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient ECM

Devil Girl 2006 2500HD LBZ Ex-Cab 4x4

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post #3 of 6 (permalink) Old 04-15-2009, 01:11 AM
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Does he have an EGR block off plate? i know my CEL keeps coming on because of that code but i have the blocker without the fingerstick.. i was under the impression that if you had an FE8 truck that you didnt need the fingerstick, i was wrong lol

Aaron the Crazy Canuck
2006 Chevrolet Silverado LT 2500: LBZ - Allison, Greystone Metallic, 4x4,PPE airbox mod, missing muffler/cat, EFILive tuned by Nick at duramaxtuner, MA tie-rod sleeves and Grade C headgaskets
Totalled!! May 2nd 2008-2005 Dodge Ram 3500 laramie: Cummins auto, plain white, rebuilt tranny
1986 Mercury Capri - 5.0L, AOD, shorty headers, acell ignition, Holly street dominator intake, Holly 625 vacuum secondaries carb, Dual glass packs "my little yellow terror"

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post #4 of 6 (permalink) Old 04-18-2009, 12:20 AM
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Have the same code

I have the same code come up on my truck. I got the blocker plate and the fingerstick and it didn't do a darn thing. So I took the next best route. I took my dash off. Easy Job. Took the gauge panell apart. Also easy and put a piece of electrical tape across the opening for the check engine light. Now I never see it. Ignorance is bliss.
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post #5 of 6 (permalink) Old 04-18-2009, 02:18 AM
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I had the plate in and never had the code.But I still added PPE style finger.

Devil Girl 2006 2500HD LBZ Ex-Cab 4x4

EFI Live tuned by IdahoRob,MPI twins installed by BigDipper,PPE lift pump, BigDipper 30% injectors, BigDipper Trans Precion ML converter.PPE Twin Cp3's.

Alot Of thanks To Kat & Pat at duramax diesels, Joe & Dan at PPE,George aka BigDipper
RIP LBZ 6/1/08@5:44pm she was strong

She's Alive again

Born on July 27, 2008, 11:59:02 PM

http://www.dieselbuilder.com/Media/P...adoBuild_2.pdf
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post #6 of 6 (permalink) Old 04-23-2009, 05:32 AM
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Quote:
Originally Posted by Bandit View Post
I have the same code come up on my truck. I got the blocker plate and the fingerstick and it didn't do a darn thing. So I took the next best route. I took my dash off. Easy Job. Took the gauge panell apart. Also easy and put a piece of electrical tape across the opening for the check engine light. Now I never see it. Ignorance is bliss.
this could be a costly mistake in the long run, it might be a better solution to get a tuner that will shut the egr off, that way the ecm will never bother to try and open it, and will never know that flow is insufficient, and you get all those fun power levels too.. lol im still broke from going to school 4 years in a row, so i cant afford the toys yet but they are comming

but i dont recommend covering your CEL... no bueno lol

Aaron the Crazy Canuck
2006 Chevrolet Silverado LT 2500: LBZ - Allison, Greystone Metallic, 4x4,PPE airbox mod, missing muffler/cat, EFILive tuned by Nick at duramaxtuner, MA tie-rod sleeves and Grade C headgaskets
Totalled!! May 2nd 2008-2005 Dodge Ram 3500 laramie: Cummins auto, plain white, rebuilt tranny
1986 Mercury Capri - 5.0L, AOD, shorty headers, acell ignition, Holly street dominator intake, Holly 625 vacuum secondaries carb, Dual glass packs "my little yellow terror"

DURAMAX INDEX; You want a Duramax? you want to click on this >>The Duramax Index

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