Code Po380 - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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Old 01-26-2008, 10:07 PM   eBay Motors  #1 (permalink)
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Code Po380

Hi Folks
I'm new to the form. Kind of found it by accident.
Pretty neat accident.
Got a small problem.
The truck is still running fine.
2004 6.6
The check engine light came on. Got code PO380.
Book says itís a weak glow plug sensor.
Anyone else had this problem?
Where are the glow plug sensors located.
What was the fix?
Any advise will be greatly appreciated
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Old 01-27-2008, 01:34 AM   eBay Motors  #2 (permalink)
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Welcome to the forum! I believe that code is for a faulty glow plug controller. That should be covered under the emissions warranty if you look in your warranty book. I don't think it is that hard to change seeing that alldatadiy.com says it gives about a half an hour labor for it. I don't have a picture of it off there...it doesn't even give a part number for it.
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Old 01-27-2008, 03:12 AM   eBay Motors  #3 (permalink)
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Thanks for the reply.
This site was really a great find.
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Old 01-28-2008, 05:30 PM   eBay Motors  #4 (permalink)
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mine was the glow plug relay
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Old 01-28-2008, 05:38 PM   eBay Motors  #5 (permalink)
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The few i have seen were either a bad glow plug or a bad relay!
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Old 01-28-2008, 07:27 PM   eBay Motors  #6 (permalink)
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to the site!
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Old 01-29-2008, 10:18 PM   eBay Motors  #7 (permalink)
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Got hold of the dealer. Their 50 miles away. Wanted to make sure they had a controller.
They didn't but they ordered one. Going to be in in about a week. Said they would give me a call so I could make an appointment. Thanks for all the help
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Old 01-30-2008, 09:08 PM   eBay Motors  #8 (permalink)
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New question. My service engine light went out. Is there some kind of default that shuts it off if the computer does not see the problem anymore?
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Old 01-31-2008, 11:57 AM   eBay Motors  #9 (permalink)
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yes, I beleive it will go out if it doesn't see the same fail for "x" amount of warm up cycles. (what exactly x is...I don't know)
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2004 GMC 2500HD D/A CC Carbon Metallic w/ LB7
4" turbo back MBRP exhaust, Cognito UCAs & HD tierods
TST Powermax Programmer, Diablosport Predator
305/70-16 BFG T/A KOs on Eagle Alloys Series 187
Clifford remote start. High Idle, Bilstein 5100s, 1.5" lift blocks
CAT fuel filter w/ nicktane adapter
Magnum Force Stage 2 intake with AMSOIL filter
Racor 2 Micron pre-OEM with heater & water sep
Lightforce 140s from Madjackracing
http://WWW.ATPTRUCKS.COM/
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Old 01-31-2008, 08:55 PM   eBay Motors  #10 (permalink)
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Thanks for the reply. GM Dealer called today and the parts. The service engine light being out was short lived. Its back on. Made an appointment for next week.
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