"Poor DEF Quality Detected" now what

[quillcom]

Just got this message today along with the constant flashing exhaust symbol.

Got a 100 mile jaunt up yo Fondy, WI

Stopped at a rest stop 15 away from drop ask other truckers what their experience was when this happened.

They said they ignored it but days later they were derated to 15mph
or less.

Called dispatch they said you should be ok it may be just a sensor problem.

Told them I have never seen this truck do this before.

I'm going to have them look at it tonight.

What are your expos on it?

 

[gearjammer]

couldn't' tell you I never had a truck that I had t fill up with fertilizer

 

[quillcom]

couldn't' tell you I never had a truck that I had t fill up with fertilizer

Lol, how do I go about banning you.
Can you at least tell me that.

 

[gearjammer]

 

[quillcom]

Requested a parked regen. Doing that now, will see if it helps.

 

[ironpony]

Requested a parked regen. Doing that now, will see if it helps.

DEF problems and DPF regens aren't connected... you do know that?

 

[quillcom]

EF problems and DPF regens aren't connected... you do know that

All I know is that it asked for regent so I'm giving it. It did not ask for it prior to this prob.

Now I got 90min before 5mph derate.

Update 75min

 

[Electric Chicken]

All I know is that it asked for regent so I'm giving it. It did not ask for it prior to this prob.

Now I got 90min before 5mph derate.

Update 75min

Make sure you remove all your personal effects.

 

[Duck]

Make sure you remove all your personal effects.

Yeah it might spontaneously burst into flames.

 

[quillcom]

Make sure you remove all your personal effects.

I beat it...


Home sweet home.

 

[Electric Chicken]

I beat it...
View attachment 49957

Home sweet home.

Wait until you get to the next level. Bowser gets meaner and faster.

 

[quillcom]

So

Word is we have to watch where we get are def from. Yes I basically was sucking it from one place only.
Looks like I wont be pulling def from there anymore.

Some say you should not get def from fuel islands at all but we should be buying it.

@ironpony I knew that regens help to get rid of the soot from the filters or wherever,
does not having bad def liken the possibility of extra soot? I'm asking

 

[quillcom]

Wait until you get to the next level. Bowser gets meaner and faster.

What level

 

[ironpony]

I knew that regens help to get rid of the soot from the filters or wherever,
does not having bad def liken the possibility of extra soot? I'm asking

DEF is injected in a catalytic converter after the DPF to diminish formation of NOX - it doesn't add to the backpressure on the engine exhaust like soot contamination in the DPF. AFAIK, we wouldn't even know it was there except for all the extra software and hardware added after Navistar/International started whining about everyone else's approach to NOX suppression after they realized that the MaxxForce engine wouldn't come close to meeting EPA 2010 targets.

 

[quillcom]

DEF is injected in a catalytic converter after the DPF to diminish formation of NOX -

Yes I see that is one of its uses, but it appears def is used also to burn off the soot.

I will check further on this.

 

[quillcom]

DEF problems and DPF regens aren't connected... you do know that?

First, need to know the basics about diesel exhaust fluid? Read our 10 FAQs and answers about DEF.

When Good DEF Goes Bad – What Happens
Bad DEF can lead to a host of equipment issues, including:
-Increased consumption by equipment
-Loss of DEF effectiveness
-Issues with equipment, including engine de-rating or shut-down
-Potential damage to components, including DEF dosing pump and diesel particulate filter
-Malfunctions with the machine’s SCR system

So it appears you were right on the soot issue, but saying they were not connected is
a bit of a stretch. Did I not just learn they were connected today when it asked for a regen.

Thanks for your help.

What Happens When Good Diesel Exhaust Fluid Goes Bad

 

[SueAnn]

First, need to know the basics about diesel exhaust fluid? Read our 10 FAQs and answers about DEF.

When Good DEF Goes Bad – What Happens
Bad DEF can lead to a host of equipment issues, including:
-Increased consumption by equipment
-Loss of DEF effectiveness
-Issues with equipment, including engine de-rating or shut-down
-Potential damage to components, including DEF dosing pump and diesel particulate filter
-Malfunctions with the machine’s SCR system

So it appears you were right on the soot issue, but saying they were not connected is
a bit of a stretch. Did I not just learn they were connected today when it asked for a regen.

Thanks for your help.

What Happens When Good Diesel Exhaust Fluid Goes Bad

I've had issues with DEF and now I know why. Thanks for posting that. It was really helpful.

 

[ironpony]

First, need to know the basics about diesel exhaust fluid? Read our 10 FAQs and answers about DEF.

When Good DEF Goes Bad – What Happens
Bad DEF can lead to a host of equipment issues, including:
-Increased consumption by equipment
-Loss of DEF effectiveness
-Issues with equipment, including engine de-rating or shut-down
-Potential damage to components, including DEF dosing pump and diesel particulate filter
-Malfunctions with the machine’s SCR system

So it appears you were right on the soot issue, but saying they were not connected is
a bit of a stretch. Did I not just learn they were connected today when it asked for a regen.

Thanks for your help.

What Happens When Good Diesel Exhaust Fluid Goes Bad

Dude, there's no connection between the SCR/DEF and your DPF. They're unrelated emissions system.

Interesting article though. If you're concerned about DEF quality, it would be an idea to carry a small, empty glass jar to dispense a sample of pump DEF to inspect before filling your tank.

 

[r3gulator3]

It’s not always about the DEF you bought. There are several things that can cause this, bad sensor, a coolant leak into the tank, yielded or corroded terminals at the plug on the top of the def tank. Bad wiring, crystallized def in the decomp tube or One Box depending on if Cummins or Detroit, a leaking def injector, doing a regen won’t cure it.

 

[r3gulator3]

does not having bad def liken the possibility of extra soot? I'm asking

Def is injected into the decomposition Tube where it passes thru a mixer plate and into the SCR Catalyst. This all happens down stream from the DPF, initially if you have a Freightliner product there is a def quality sensor in the Def Tank on 2013 and newer models and the wiring to it is common to corrode. Also the inlet and out let Nox sensors take readings and can throw this code in a truck without the quality sensor and that can be caused by the list of other problems I gave, not necessarily buying bad def but, it can be contaminated by other things. There is a metal coolant tube that runs through the tank to keep the def fluid in winter. They are prone to cracking. Leaking def injector causing def to crystallize on the mixer plate is the third most common.