DEF quality

Yes. It could also have been a bad batch. Is the other code for NOX or something related? Exhaust leaks will also set codes for faulty NOX.

 

Yep. DEF needs to be a specific mix of urea and water. 32.5% urea and 67.5% deionized water. Over time heat can cause the water to evaporate and the fluid can settle out somewhat, changing its ratio. Dirt can chemically change DEF as well too so any dirt in the containers and/or tank can chemically ruin DEF.

 

I just read the first few comments. Can't help but just wanted to say. It's a shame a person buys a good used truck and then has to deal with DEF issues. All those sensors enough to drive you insane. Hope you get it figured out.

 

When DEF sits to long it can "salt out". No such thing as a "bad batch" of DEF. However, you could be pulling DEF out of a bad tank (commonly at "mom and pop" truck stops) due to poor tank cleaning and management.

 

Actually there is such a thing as a bad batch. Ask the many locals who bought it from Canadian Tire a few years ago and had massive problems, then it was recalled.
Its terrible stuff, and outrageously expensive for water and basically horse pee.

 

No, there isn't such a thing, unfortunately. Every batch is tested for correct concentrations. Reasoning being is because inside DPF systems, they are calibrated for the urea concentration to provide proper NOx reduction. It is expensive, and ridiculous to have been mandated.

Canadian Tire most likely accidentally or inadvertently contaminated their batch. This can be done fairly easy.

 

Will have to agree to disagree.
Some places make better quality def than other places do daily. And sometimes a bad batch gets made, just like anything else. I have hauled fuel for 3 decades, and even the same refinery doesn't make the exact same fuel every day forever and ever. Sometimes the fuel is of a lower quality, they try to get the next batch better again. For what def is its price is just insane that is a fact. Should be about 5 cents a liter.

 

Fuel and DEF are different and have different guidelines. The API and ISO say otherwise to the "bad batch" or "poor quality" DEF. Concentrations are standardized, regulated and tested. Hauling it's one thing... being inquisitive of those working with it is different... you're not the only one that's hauled.

 

Yes and manufacturers miss the target on quality all the time.
So we will never agree.
Hopefully oneday soon the engine makers come up with an emissions system that doesn't use def at all, making every truck driver and equipment operator happy.