We appreciate this information very much, Paccar should have you on payroll you are an asset to KW owners. THANKS AGAIN my friend, we will be keeping an eye open for anything you have to teach us all.

G, I can't thank you enough for all that information. Great video 👍 the exact same thing is starting to happen now with my truck so at least I know where to look for the problem, again thank you

thank you for sharing your knowledge with us, it is highly appreciate it

Thank you. Solid info, exactly the knowledge I needed

I just went through this for the replacement DEF sensor for my W800. Why isn’t PAC CAR being held accountable for this issue? I see a class action coming.

Thank you for this. My truck was in recall for this sucks that I have to buy the parts cause KW service is 2 to 3 weeks out.

Good video

I'm in the rental business and we have found from our Houston shop there's a guyaking black boxes that modify the Can/ high/low that shows 6 different codes It's not heat it's a failure in design can't post pics u can install a 1 way diod that will male it read full

This is very informative! Thank you

I am having this problem with a kenworth t880 2022. I am contacting a lawyer and going after paccar for this

Thank you man for making this video I'm going to try it out. I have a Kenworth T680 the same problem

Will this stop the truck from sending any voltage at all to the def level sensor?

It evidently isn’t just a paccar issue. I have the code for def tank level circuit failed high. It’s on my 2019 freightliner cascadia with Cummins x15

Had the DEF Quality issue warning. First red def light then the flashing red. Will derate after about 30 minutes driving (goes to flashing red). Also will eventually derate to 5mph even if just idling (2-3hrs of idling).

I had the same problem with my school bus a few months ago

I replaced on my KWT680 sensor and valve and still have light on :(

What is the TSB #

I thought it was the vibration screwing with them

Hi ...i have problens on mi act valve....

I have the same issue with the DEF Temp code. 3 weeks and counting for waiting on parts

So Not to get anyone's panties in a bind.... I work at a sales company. The def quality sensors are a HUGE problem you all know that. Just to corroborate; We(I LOL) have been having to replace a lot of radiators in trucks. You know they are glass reinforced composite anyways. Freightliners end up having lots of problems with the 6.7 isx line. Leaking EGR coolers and there is a fitting halfway down the block on the passenger side that happens to be a turbo coolant return. It leaks a LOT. But only when the motor has completely cooled off. Funny right?. Anyways, overheating is a thing with these trucks.

are you working somewhere i changed so many parts on the def system. I have a kenwort 2016 and if you work somewhere I would love to come this is frustrating and I don't have any more money for repairs ??

Can I unplug something and just run?

Anyone need a urea level sensor. They have 3 in denver found a bunch online. 2016 KW t680

Double yoy!

I’m waiting on Peterbilt 348 with paccar for 6 weeks now. No parts available l. Not happy and lawsuits need to be filed.

Before you spend any money because it's not doing a region and high soot level replace the deferential pressure sensor by the DPF. Do not spend thousands of dollars on on DPF filter and shop labor the deferential pressure sensor is easy to replace you can do-it-yourself

Fu*kkk! Im in Houston, and pretty much all Rush centers, KW performace and peterbilt dont have this sensor for atleast next 6-12 months, they're not even taking orders just because they have '100s of trucks all over the services shops and they are also waiting for this part and they need to be out of shops first before they can even began to place order for customers'. As an O/O im running out of options here, even considering doing the you know what..

Just did job tri axel 2021 Pete with mx13 Paccar flat bed. Def tank read empty but full Limp mode 5mph. Got replacement level sensor 338 dollars put it in turned the key gauge read full light went out. Truck only had 26000 miles. I don't know why they made a different kind of sensor like this video has so stupid.

I looking at t660 2010

Its funny how paccar makes this an updated bulletin but dont want to cover their dumb design engineering unless the truck is under warranty

You so right,we need to all get together and sue these dealers because the mechanic are dumb