LLY: Hello i I'm new to the Duramax just bought a 2005 291000 miles love the truck have a

[joecool752]

Trouble code 1039 replaced the fuel filter and fuel cap no change when I tow heavy or get on it sometimes it'll pop the code and go into limp mode and I have to clear it out to continue driving

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[TheBac]

Moved to LLY section.

 

[WVRigrat05]

What are you reading codes with? There is no 1039, you getting an 0086?

 

[joecool752]

A cheaper scanner , it's a real code check it out at auto parts store have a print out

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[WVRigrat05]

A cheaper scanner , it's a real code check it out at auto parts store have a print out

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1093 is the only thing I find.

 

[WVRigrat05]

http://www.pacificp.com/dtccodes.htm

 

[Novak]

Low FRP


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[Novak]

Does it surge at idle at all?


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[joecool752]

Does it surge at idle at all?


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Some

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[joecool752]

Some

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1039 i have seen other people on this forum with this code

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[joecool752]

1039 i have seen other people on this forum with this code

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When it's running it's like nothing is wrong when under load like a lean out in a gas motor. Lift pump or fprv

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[Novak]

Your FPR could possibly be failing. Any other noticeable symptoms like fuel economy being poor or power loss. I understand the platform is new to you but has it been like this since day 1? Blowing smoke?


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[joecool752]

Your FPR could possibly be failing. Any other noticeable symptoms like fuel economy being poor or power loss. I understand the platform is new to you but has it been like this since day 1? Blowing smoke?


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Yes decent amount of smoke at wot only have 3000 miles myself so no mpg to compare 18 to 20 empty box

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[joecool752]

Yes decent amount of smoke at wot only have 3000 miles myself so no mpg to compare 18 to 20 empty box

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Frp is a little bit jumpy at idle 4000 plus haven't seen it when it goes into limp mode. Have a zf6 6 speed no tranny limp mode

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[joecool752]

Frp is a little bit jumpy at idle 4000 plus haven't seen it when it goes into limp mode. Have a zf6 6 speed no tranny limp mode

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If it didn't have 290000 plus on odometer I would like to build a 600 hp monster. But I got it to work and pull a camper on the weekend

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[joecool752]

Frp is a little bit jumpy at idle 4000 plus haven't seen it when it goes into limp mode. Have a zf6 6 speed no tranny limp mode

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Pulled 10000 lbs this week 10 times had trouble with the limp mode 1039 code twice on one trip empty to the rock yard once then on the way back fully loaded 10000 plus 180000 lbs. Truck pulled it like a champ then with no warning 1039 and limp mode

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[joecool752]

Pulled 10000 lbs this week 10 times had trouble with the limp mode 1039 code twice on one trip empty to the rock yard once then on the way back fully loaded 10000 plus 180000 lbs. Truck pulled it like a champ then with no warning 1039 and limp mode

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I only paid 7000 and it has a full sized flat bed

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[ChrisPerry]

1039 i have seen other people on this forum with this code

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Its a p1093 low rail pressure during fuel enrichment .... p1039 is a O2 sensor code and doesn't exist on a Duramax.

P1093 can be a bad cp3, injectors return rate too high, fuel line collapsed, filter head allowing air into system, bad fprv, too large of a tune, or a bad or cheap fuel filter.

I'm sure that there are more possibilities, these were just the ones I can think of quickly.

 

[joecool752]

I am confused I seen code 1039 with my own two eyes with two different code scanners and a print out from the auto parts store. I am not saying any of you are wrong I'm having trouble finding it on the internet to

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[Novak]

Do you have any sort of gauges or anything like that?
Might be time to invest in some. Gauges and testing tools will save you cash in the long run.


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