GM Duramax: "Service Emissions System" but no DTCs??

GM Duramax: "Service Emissions System" but no DTCs??

Got called in to a shop 2 hours away to look at a 2012 GMC Duramax Diesel that is stuck in LIMP MODE due to an Emissions System fault.

Shop owner already replaced some parts, and no DTCs are set!
The messages displayed are:
“EXHAUST FLUID QUALITY POOR” and “SERVICE EMISSIONS SYSTEM”.

How do we go about clearing this annoying message and resetting the Emissions System?
GM DEFinitely doesn’t make it easy!

THINK TOOL PROS:
https://www.amazon.com/dp/B08XXWHQVJ?ref=exp_pinehollowautodiagnostics_dp_vv_d

Enjoy!
Ivan

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Comments

Neil Murphy says:

Why doesn't the dash just say risk of DPF getting clogged regen now

Paul M. says:

You should work on planes, I might feel a little safer flying. (^,^) !!!

dbinok says:

I had been thinking about getting a diesel. I knew about diesel exhaust fluid being needed for newer diesels, but I never knew it would gradually disable your truck until it is unusable when it has a problem. Definitely will only want to look at pre-def trucks. Looks like anything before 2010 model year.

dewey cheatem says:

What a cluster. but true to form, you don't give up. A couple of trucker pals complain bitterly about the Def systems making life miserable. On the plus side another NPR to add to the list of jobs done by shear determination.

eldoradony says:

At 10:00 when you hit the start and the engine started to rev I thought it was going into re gen mode and the exhaust would be throwing flames. Luckily this video had a successful ending.

Vlada Vidakovic says:

1:43 Had similar issue on my van at work. In this case, i would check DEF level sensor…

john dutton says:

its a shame that you have to own all these different types of scan tools to get 1 job done maybe thats why Eric O has mostly all of them lol

Greg Scott says:

Good grief, when the warning message is the hardest thing to correct. Argh.

Paul Paquette says:

I sure you hope you sent a complaint into Thinkcar. It really rubs me the wrong way when these aftermarket tools, in which we pay extremely good money for, say they will do a job and then do not perform. Great Diag and Persistance good Sir!

Drew Bush says:

i am trying to get rid of my launch torque x431 paid almost 2,000 for it.. the link you have for thinkcar tool pro is not from the usa. does anyone sell it from the usa?

Ken from Silverdale says:

Another case of a non OEM Scan Tool burning a tech!!!

I can't count the number of times I saw that as a GM Dealer Tech when other shops brought in problem cars that seemed to be non-repairable.

Good for you sticking to it until you exhausted every last option, many would've just given up!

agmc4me says:

EPA really made diesels a mess

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