"STUPIDEST SYSTEM EVER", agreed.

The clogged portion made of plastic is the DEF heater for the air pressure inlet into the metering unit. There are actually 3 or 4 possible clog points between the DEF metering unit, DEF pump module, and inside the SCR diffuser tube inside the 1-box. They got rid of this hokey Air pressure over DEF system in 2015 models. Now all you have to worry about is the DEF pump, filter, and electronic metering unit. I've never had an issue with DEF clogging in any of the lines or inside the new electronic metering unit. We typically see more issues out of excessive DEF buildup inside the 1-box because of improper temperature in the DOC and DPFs from goobers who don't get their DPF dosing injector cleaned out every 100,000 miles.

I deleted my 2016 Cascadia, DD15, and have not had ANY issues with my truck since. None. Period.

Super helpful video saved me the hassle of having to find where my problem was! And back on the road

Thank you for the info and saving me money

👍👍

i wish people would look atit from our engineering side. the system is absolute genius. if you do an amission test on these truck you have zero polutant exhaust and thats the point. yes things fail i get its down time and loss revenue for drivers. we get that and really try to make improvements along the way some things are just unavoidable.

2 filters? Nox? Clog? Crystallized Def? Def Orfice tube?

It seems like when you have it apart you would purge the system to blow out any chunks that may be in the line.

Awesome Video!🎥

Why couldn't a person disconnect DEF tank to pump/filter line and run a line to bucket of hot/warm water. Then disconnect dosor at DPF/SCR 1box. Run the quantity test with Detroit software? Cleaning entire system. The money saved on this procedure alone would pay for the software and nexiq hardware. Not counting others throughout the year. Just wondering if this is a viable solution if performed 1-2 per year.

What are some symptoms if this is bad?

Thank you from mechanic to mechanic

Nice job Provost!

That is the metering unit.

You removed the Diesel Exhaust Fluid Metering Unit Diffuser Heater

By the way you can get ecm tuner instead of the one he has. He has 1899$ one its nicer. Ecm tuner is 999$ has no screen you plug in and can clear codes and set tunes for fuel milage still just no fancy screens.

I want the Bully dog reader

Will this be the same for 2018 freightliner DD 15 engine?

Great vid! I just want to know, what happen with the DEF system when that valve is really dirty? Thanks 🙏🏽

You did a very good job and that’s what the problem I have and I’m looking for to fix it and also you mentioned it’s a deal up but not a dealer is the Steeler you’re actually right

What code was the tractor giving for this problem?

I don't think my 2016 has that def meter. Maybe just an injector.

Awesome, just awesome!

You have to remove the air fitting to remove the filter

Aftertreatment SCR Operator Inducement Data Valid But Above Normal Operating Range - Most Severe Level

The bully you've got is like around $1900 , kinda pricey

What's the name off that fuel monitor/code reader

Thanks brother

Hey! Thank you so much for this information brother man! What year truck is this

good video. thanks.

Awesome people, thank you sir.

Great Video Brother.

I have 2013 cascadia dd15. Just had egr actuator replace and when def tank is full.. DEF bar is down one bar every 180miles. Any idea what could be causing that?

Agreed "Stupidest system ever"

Where are you located? And can I come get mine repaired

helpful video. where from you buy that device which shows you fuel milage and how you hook up to truck.

Where did you buy that code reader from at the end of the video and how it costed

I just do the same shit Clean it and put it back and I save a $1000.00 from the Stealers!!

Great vid! Got solid amber light on. 1st time it was my def filter, after two month's, it lit back on. Going to check that part next. I really like your bully dog unit, if you don't mind me asking, witch unit is it? And did you have to get a 9 pin to a obd2 pig tail?

Great video sir! Two quick questions about the bully dog. Do you really see improvement with your fuel mileage? If my truck went into a derate would I be able to clear the code so that I could make it back home or into a shop? Thanks for your help.

I changed the Metering unit your cleaning. Didn't fix shit. Truck still deteriorating. POS DEF system. Delete is the alternative.

Freightliner is owned by Daimler a German Company!

Do u have to use hot water or Will Carb cleaner work too??

Any idea what year that Cascadia was?

Does 1516 and up half Metering or no? Thank you

I was clean the DPF filters but my truck every 300 miles run 🏃 and again need to regn 😰😰😰 Anybody help me the solution Thanks 🙏

Parts number rebuilding kit????

Boiling water removes the crystals instantly

How did you get THAT 3RD SCREW out, when separating two parts?? Please, HELP

Bully dog is not legal in California btw. So hide it lol

Some guys I know soak the filters in mr. Clean much cheaper than going to the dealer

diesel exhaust fluid

This just happened to me today

Is the DEF made of cow piss??? 🤔 many truckers say to not touch it and get it on your gloves.

This is Mercedes gear

Hey, where are you located, I have a problem with Scr

You missed 2 other filters

Or you can just do it the right way and jump into detroit diagnostics and find all the issues by running and following the steps they have layed out and not have to guess. Brilliant.