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Freightliner Cascadia DD13 DD15 DD16 DEF problem DEF pump not working SPN 4374 FMI 0

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WARNING!!: ⚠️⚠️⚠️
Always use the proper tools and safety equipment to perform this job.
Failure to perform the job correctly can result in personal injury or vehicle damage.
Don't do this job if you think you don't have the experience or the equipment to do this job correctly. REMEMBER SAFETY FIRST!
Warning!!! ⚠️⚠️⚠️
This video is just a demonstration of the labor to do to perform this job, the results may vary.
Also, the damage found can be greater that expected and it can result in a massive engine failure.
This video contains advance technician information.
this process is going to be similar to all trucks with
freightliner western star mercedes benz
DD13 DD15 DD16 OM471 OM472 OM473
Topics discussed :
how to inspect a bad SCR box wiring
when to know when is time to replace the SCR harness
what type of problems you get with a bad wiring
The symptoms of the fault are:
red stop light on
check engine light on
yellow amber light on
regen light on
DEF light blinking
derate mode on
no power
5 miles per hour derate
vehicle does run more than 55 miles per hour
SPN 4374 FMI 0
SPN 5246 FMI 0
SPN 5246 FMI 15
SPN 5246 FMI 16
Tools need:
DDDL software
Parts needed
---
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Опубликовано:

5 сен 2024

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Комментарии : 45

@DK-jk2cn 3 года назад

I had this code and was fighting it for months. Everything you say is true. First thing I did was change the pump, that didn’t fix it, then I took the def tank off and looked at inlet screen, it was dirty so I replaced the inlet screen. Couple days later I get the code again, it was on the injection unit this time. It was not a bad injection unit but the gasket around the injection unit was allowing air to mix just a little with the DEF and was crystallize right at the spot the injector was spraying at. It was clogging it up. I changed the gasket out and that finally fixed all my problems

@jattworld1984 3 года назад

Were you able to drive the truck with this code on ???

@DK-jk2cn 3 года назад

@@jattworld1984 barely. it was very derated

@cameronsolomon4249 3 года назад

i know I'm kinda off topic but does anybody know a good website to watch new series online ?

@carmelolennon6259 3 года назад

@Cameron Solomon Flixportal :P

@cameronsolomon4249 3 года назад

@Carmelo Lennon Thanks, I signed up and it seems to work :D I really appreciate it!!

@gilbertkhodadadian1667 3 года назад

Hi I’m mechanic myself. Your video actually helped me a lot. For this specific problem I’ve struggled a lot. Thanks for the useful video!

@navpreetmiglani7538 2 года назад

hi sir,,,can u please tell me how long i can drive with spn 4374.please tell me

@moneymikeslickwill8749 3 года назад

Great video for us mechanically inclined gear heads

@DK-jk2cn 3 года назад

Also, before you change the pump make sure to check the ends of all the blue accordion tubes that send and return DEF. sometimes those little white collar clips will crack and bleed a little bit of DEF and you need to replace the tube

@marvinportillo18 3 года назад

Muchas gracias francisco porfavor hacer mas videos como este . Para aprender mas del sistema drl def y dpf excellence video

@DK-jk2cn 3 года назад

One way you can kind of tell if the problem is on the side of the DEF tank or on the side of the 1 box (SCR box) is by unclipping the inlet line on the DEF pump and to see if had a steady flow of DEF or if it’s dry or barely coming out. Do this with the truck off. If the DEF is not coming out or just barely (a few drops) out of the inlet side of the pump then it’s a problem in the def tank (check the inlet screen) but if the flow is good to the pump then I would just the injection unit. Take the steps off the passenger side, undo the 2 def line and unplug the injection unit take off the 3 Etorx bolts and slide the unit out of the hole. You can pretty much tell right away if there’s a problem there because there will be a lot of white crystallized DEF in the area where the def is being sprayed or in the actual holes on the injector.

@DK-jk2cn 3 года назад

This is just how I did it. There are better ways to diagnose this issue, but this is all stuff you can do by yourself without a scan tool. I have had to do these things in Yukon Canada on the side of the road, not fun but at least I figured it out enough to get me and my trailer home.

@heribertovega7474 3 года назад

Gracias por el video, está bien se aprende de aquí y de alla. Cuando un mecanico también tiene experiencia manejando también desarrolla intuision. Gracias buen video.

@2024carlos 2 года назад

hi i have the same code and the problem the i have is the def filter is open and all the def is coming out is and easy fixed just have to buy new def filter kit.

@imadahmmad1965 3 года назад

Thanks for information Amaya my best those trucks needs too much maintenance

@quocbinhduongnt8646 3 года назад

công nghệ hiện đại thì cũng hại điện hen anh ơi

@gamekingkiler 2 года назад

Can I keep my truck on idle with a bad def pump, unfortunately I'm stuck at the truck stop till pump arrives?

@tommdauenhauer3860 3 года назад

Hi Francisco, soy un gringo que habla e falo - I'm a gringo who speaks Spanish and Portuguese. I've been studying your DD15 videos and they're excellent. I'm also a sound engineer for TV shows to the west of you and when you play your radio it's hard to hear some of your very important words. What's the best way to buy the Freightliner Diagnostic Software for Windoze? Do you have to buy it from the stealer or are there other good sources for the software? I'm going to buy two used Freightliners for short haul trucks I need and want to be sure what the real problems are with them. I'm seeing a lot of low DEF and Smoke Swirl Lights on the dash and the RPM only goes to 1500 on the DD15. Derated for sure. Muchas Gracias!

@thedisneytribe8687 3 года назад

Grasias por la informasion si pudieras aser mas videos de computasion grasias

@nicaro71 3 года назад

These videos are so informative

@DK-jk2cn 3 года назад

Also to anyone that is wondering if it’s a problem with the DEF pump, I would pay the 100$-150$ diagnostic fee to a experienced mechanic just to confirm if it is a bad DEF pump. Much cheaper than buying a new pump. This problem can be as simple as an inlet screen being dirty or a crack in the line. It’s not always a DEF pump problem. These pumps should last about 200-250k miles from the guys I talk to that work on the GHG14 emissions systems

@namentatic4978 3 года назад

You should clean up or replace DEF metering valve.

@carlosfreyre6534 3 года назад

Caballero donde se encuentra el fusible de la ecm de mi camión freightliner century 1998

@QuyNguyen-ny5bv 3 года назад

Thank you for video

@carlosrivas1097 3 года назад

Good videos cherro.

@work2011 3 года назад

Thank you so much

@joemata4183 3 года назад

So, what parts did you replace?

@JB-nm6uk 3 года назад

Great video

@samsonalemu6089 3 года назад

Thank you so much help video

@louis-thomasdore6034 3 года назад

Replace DEF pump and doser ??? if no external leak or any contamination , air bubble in the line , FACTORY procedure is to replace the RS supply kit ( little filter kit for the pump and doser ) wich fix the problem 99% of the time

@glackaglack1534 2 года назад

Are there a fuse or reley for the def pump?

@jtdehoyos 3 года назад

Tengo k hacer reset la pompa despues d reemplasarla?

@fifty-niner3941 3 года назад

I have 2016 FRTL whenever I put DEF after 100 200 miles later I gets the check engine light and I have to pull over do Region , went to dealer many times spend so much money but the problem is still there.. any tips?

@namentatic4978 3 года назад

Try to use the DEF from the plastic containers, not from the pumps. They are nasty and mostly contaminated.

@johnsnow3457 2 года назад

Hi Francisco, pls advise. I dont have any fault codes. But my def pressure is low 7 psi almost all the time. Replaced def pump, one of the def lines from pump to the def tank cuz i had fault code def heater line # 5, then I replaced it. But i still have this issue. When its 20 F outside i noticed white smoke coming from exhaust pipe on a cold start. And I hear weird cyclic noise on a low rpm sometimes especially when its cold outside (my def pressure 160 psi at that time).