AdBlue top-up issue (merge)

[Dellmassive]

Leave it as it is.

Don't top up.

Defo don't brim it.

Just carry on driving.....


It will start to drop soon, in 500mile jumps.

You have most likely overfilled it last time.

 

[Sackmycook]

As above, they sell ad-blue on the Continent

 

[Steved55]

Thanks @Dellmassive - I assume it's readily available in europe

 

[Drew75]

Hi
I’m after a bit of advice on Adblue problem
my van keeps going from 6500 miles and drops to 650 mile saying it needs topping up but I’ve only done around 200 miles from last top up
I took it in to VW at Dartford they said it need a tank drained and sensor reset after they have topped it back up
Dartford van centre ripped me off to do this work charging me £418 for the above work NOT happy with them
but I paid cos I just wanted my van back

after a week of driving my van around it’s all been good until today I pulled away fast on a steep hill and the Adblue light came on saying it only has 650 miles left but I’ve only done about 150 miles since they topped it up after the work they done

I’ve got to take it back they have told me any help would be appreciated

 

[Dellmassive]

are you overfilling the tank?

DPF Regen, Yellow Light & Adblue - Whats It All About? -

DPF Regen, Yellow light & AdBlue - Whats it all about? - The DFP light is becoming a more apparent issue with modern diesel vans, unfortunately, it’s a fact of modern diesel life. what is a DPF? Diesel particulate filters (DPF) are very effective in cutting emissions, trapping even the...

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.

 

[Drew75]

i did the first time
that’s why vw reset it
but I’ve not put any Adblue in sense vw topped it up last week

 

[Drew75]

if I’m right it’s on 3771 software?

 

[Dellmassive]

how many miles have you done since last week?

im thinking its still too full. and the tank sensor is not reading the drop in level.?

 

[Drew75]

About 150 miles

 

[Drew75]

Vw topped it up from empty to the right level

 

[Dellmassive]

Just keep driving and see what happens.

Mine goes to 4000/4500 miles when filled up.

If you're a 6000 mile adblue, 150 isn't much of a drop from full.

But if the range continues to drop from 650mile down there may be another issue.

 

[Drew75]

Yes I will try just driving it
But I don’t think if I pull away fast on a hill I should get a adblue warning light come on
I’ve been having this 6500 to 650 problems for 2 months now just won’t it to be right as I’ve got no trust in doing any long journeys

 

[Drew75]

Any view out there on mapping the adblue out ?

 

[mmi]

if I’m right it’s on 3771 software?

There is an update available (3771 -> 6168). However, not sure it would solve this issue.

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Any fault codes?

Please post

• full VCDS Auto-Scan,
• blockmap data from 01-Engine
• blockmap data from 17-Instruments.

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Engine running (preferably "hot" - after some driving, 15+ minutes)

VCDS > Applications > Controller Channel Map >​

Run this for Single Controller Addresses 01 and 17​

​

Tick/fill boxes as above and click Go.​

VCDS flashes screens for a moment (when finished hit "Done, Go Back") and there will be files

blockmap-01-... and blockmap-17-...​

in folder C:\Ross-Tech\VCDS\Logs\....​

​

---

PS. For Auto-Scan on T6 please use "Auto-detect" feature and Save as txt-file.

 

[Drew75]

Ok thanks I’ll do a scan tomorrow and post

 

[Drew75]

Hi hope this helps
have trouble finding the blockmap on my laptop i done it but its gone some where

 

[mmi]

have trouble finding the blockmap on my laptop i done it but its gone some where

I'm afraid the VCDS interface cable is "too" old - thus simply not capable of doing the maps.
The blockmap functionality needs HEX-V2 or HEX-NET cables.
Alternatively the maps could be done through VCDS > Engine > Adv. Meas. Values by ticking/saving/unticking 12 values at a time. The problem is there are almost 1500 parameters. Controller channel map functionality would have recorded all of them in less than 70 seconds.

Anyways, here is a short list of values to record/save by using path VCDS > 01-Engine > Adv. Meas. Values and VCDS > 17-Instruments > Adv. Meas. Values

From 01-Engine

IDE03139 Reducing agent injector: resistance​

IDE03142 Remaining vehicle distance until reducing agent deficiency​

IDE03387 Duration of overtemperature at the reduction agent injector​

IDE06059 Particulate filter: oil ash mass​

IDE09009 NOx sensor after SCR catalytic converter: supply voltage​

IDE09648 EGR travel diagnosis: slightly increased NOx emission​

IDE09649 EGR travel diagnosis: strongly increased NOx emission​

IDE09650 AGR travel diag.: increased NOx emission effect. throttle valve​

IDE09651 EGR travel diagnosis: marginally increased NOx emission​

IDE09881 Oxygen sensor bank 1 before oxi cat: electric. corrected Urie sensor value​

IDE10241 Reducing agent pump module relative press.: calculated​

IDE10249 Reducing agent fill level sensor: act. value​

IDE10916 Reducing agent system debounce distance​

IDE11219 Reducing agent inj. quantity: spec. value​

IDE11220 Reducing agent system: current status​

IDE11221 Reducing agent system: last status​

IDE11222 Reducing agent system: current substatus​

IDE11223 Reducing agent system: last substatus​

ENG110382-ENG20516 SCR inducem system status-inducement system active​

ENG110382-ENG20517 SCR inducem system status-reagent level too low​

ENG110382-ENG20518 SCR inducem system status-incorrect reagent​

ENG110382-ENG20519 SCR inducem system status-deviation of reagent consumption​

ENG110382-ENG20520 SCR inducem system status-NOx emissions too high​

NOTE: Some of the parameters have multiple instances - tick all of them.


From 17-Instruments

IDE00337-MAS00261 Status of input signals 3-Exhaust Malfunction Indicator Lamp (MIL) (OBD)​

IDE00778 Urea operating range​

IDE00849-MAS03235 Urea status 1-Urea warning level 1​

IDE00849-MAS03236 Urea status 1-Urea warning level 2​

IDE00849-MAS03237 Urea status 1-Urea: acoustic warning​

IDE00849-MAS03238 Urea status 1-Urea: text​

 

[Drew75]

Thanks for the reply I’ll give it a go tonight after work I’m new to this vcds so bear with me

 

[Drew75]

The van is going back in to Vw in the morning so it would be great if I have a of knowledge to fight back with as they just rip people off in my eyes

 

[mmi]

Questions:​

• Do you know service/repair history of the van?
• How many miles you have done without the AdBlue range drop incidents?
• Any previous work done on the DPF? Asking because catalytic NOx trap is part of that, and I'm suspecting the trap can be destroyed e.g. by improper flushing. Without the catalyser the AdBlue simply can't do it's job properly - cut off NOx emission.

---

The crucial values in the data are the bolded ones.

01-Engine​

IDE03142 Remaining vehicle distance until reducing agent deficiency​

IDE10249 Reducing agent fill level sensor: act. value​

17-Instruments​

IDE00778 Urea operating range​

​

I'm expecting to see that

• in Engine both values read out "plausible" numbers - AdBlue level somewhere 100-130 mm and respectively the distance 5000-8000 km for a fairly full tank.
• The Urea operating range will have a discrepancy with values reported by engine- normally they are the same

The root cause for the discrepancy is still unclear to me but guessing it relates to AdBlue not been as effective as expected (see P20EE fault - NOx sensor reading 354 ppm)

• Software issue which usually should cure itself. However, your case seems to be more stubborn. Either the software has got tangled and/or there is another issue, e.g.
• Clogged/malfunctioning AdBlue injector (VW has a test procedure to verify)
• Faulty AdBlue system
• Catalytic NOx trap faulty

the Adblue light came on saying it only has 650 miles left but I’ve only done about 150 miles since they topped it up after the work they done

After resetting the systems the adaptation routines can take up to 500 km to finish. Thus to confirm a succesful repair/diagnosis sometimes takes time.

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NOx related measurements before and after engine software update were reported here

[T6_measured] NOx emissions, AdBlue consumption, DPF regeneration - Before and after ECU update

Introduction An update campaign for T6 EU6 diesel engines took place in 2019-20. Affected engines were on van of model years MY16-MY18, including some of MY19. For M1 class (passenger carriers, VIN WV2...) the update was an official recall. For N1 class (VIN WV1....) the update was not...

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