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Emissions code

Cody1774

By Cody1774
in Duramax Diesel & 8.1L Big Block

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Cody1774 Enthusiast

Cody1774

Posted
Posted

Last week my service engine light came on, only a week after I bought it. It was used, but I had it for more than a week before the light came on. I don't have a GM dealership nearby so I took it to a local mechanic who was able to scan the truck for me. He said it was a harmless code, something to do with the truck's emissions. He said I shouldn't be worried, but if it comes back on that I should obvisiously seek help from GM. He showed me the code on his computer, and I may as well had been reading Russian. Yesterday the light returned. I have been thinking about it constantly and I feel like I might have a theory. Is it possible that the diesel I get from our bulk station has a higher amount of sulphur than what the truck would like? And if that is the case, is it harmful for the new diesels, long term? Is it normal to go to the bulk station and ask for what their sulphur levels are at?

 

 

Cody1774 Enthusiast

Cody1774

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I have a lot of idle time on my truck on a daily basis. It may idle for 2 hours at a time but rarely any longer than that without me driving for a bit anyways. Think that could be an issue? I've also noticed before the light came on the first time my DEF level went from 69% to 29% pretty quickly, and now for a quite a long stretch now its been at 29%. Today I filled up at Shell which probably has less sulphur than our bulk station, but that could be non issue, I really don't know. Im going to see if I can fit in a trip to the nearest GM dealer tomorrow and have it looked at.

Cody1774 Enthusiast

Cody1774

Posted
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I'll try to cut back on my idle time as much as possible. Tough when we have had a fair dosage of -30 degrees and my job requires a lot of phone/hotspotting as well as me filling out all my paperwork.

 

I will definitely ask questions when my censor arrives. Thanks

  • 2 weeks later...
redwngr Senior Enthusiast

redwngr

Posted
Posted

FWIW, all diesel manufactured in north america is now USLD. Dyed diesel is just to identify it as non-taxed - it's still USLD.

  • 3 weeks later...
Cody1774 Enthusiast

Cody1774

Posted
  • Author
Posted

as I look over the final paper work it was the DEF heater that failed. probably nothing to do with idle time? ? I did ask the question to the tech but never got a definitive yes or no regarding long idle times being a problem. definitely going to cut back on it though

Prokopchuk_9 Senior Enthusiast

Prokopchuk_9

Posted
Posted

Either way...too much idle time forces it into regen over and over again. Not good for it, get rid of that DEF and egr as soon as possible

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