Just to point out the absolute obvious here here...... The dash says to top up a minimum of 11.75L, you put in only 5L,
It was never going to work
It was never going to work
True but was edging on the side of caution believing tank was 13 litres
my 70 plate kombi 6.1 had a small adblue tank, 6k max range, my 22 plate 6.1 has the large tank giving circa 20krangeT6.1 have a 22L / 18k miles range adblue tank...(not sure at what point it changed)
T6 was about 13L 4.5k range adblue tank
Adblue amount confusing
Hi all, new T6.1 owner here. I need to add adblue as it's saying my range remaining is 1200mi but it's saying top up quantity (gal) min 3.25 - max 5.25 which is min 14.7 litre and max 23.86 litre, I thought the tank size was 13 litres?www.t6forum.com
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@colinsunbeam posted this....
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View attachment 186037
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not all 6.1s have the larger tank im thinking ?
Parts catalogue shows two tanks for all years from 2020 to 2024
7E0131877K - a T6 based part number - looks to be the smaller tank
7LA131877E - T6.1 part - bigger tank
No real indication of why two though. The 7LA part is attached to PR codes 4BI and 4BK - which just refer to EU6
Ultimately just do what the Dash tells you and you'll not go wrong.
Argos 10lts £18.50 to Spec
I THINK the adblue tanks may be different sizes according to fuel tank size. (Big fuel / smaller adblue, small fuel/bigger adblue) I have the 70L fuel tank and asked about retrofitting the 80L one. VW said I’d have to change the adblue tank (presumably for the smaller one) to do that and at £600+ for the tank I didn’t bother. Or maybe it’s Big/Big & Small / Small but they said the 80L tank would not fit unless I changed the adblue tank.
This morning my Adblue dropped from 3500 miles (1.00-1.25Ga) to 600 miles (1.00-1.25) with warning that in 600 miles, engine wont start.
Pulled into nearest services (5:30am - M4) and paid £18 for 5 litres, threw it in and turned on ignition, waited a minute or so but didnt register.
Continued my journey, after about 40 miles, registered as 5000 mile range. I wish I could just remove the Adblue system, drives me crazy!
Pulled into nearest services (5:30am - M4) and paid £18 for 5 litres, threw it in and turned on ignition, waited a minute or so but didnt register.
Continued my journey, after about 40 miles, registered as 5000 mile range. I wish I could just remove the Adblue system, drives me crazy!
My understanding is that you can but there might be implications arising from it. I'm having a nightmare with the Ad Blue system on my Audi Q5 at the moment and am thinking about an Ad Blue delete. I'm probably going to canvas for opinions on here about the issue in general rather than being car - specific once I've done a bit more research on line.
This is a familiar story. You can map the adblue system out (via software at a garage) but it is apparently dubious legally. I spoke to a garage who were doing around 4 remaps a week just on T6s. As there appears to be no solution to the adblue problem it seems the only options are to have it remapped or put up with the endless cycle of adblue problems. Very frustrating.
chopper_harris
Member
We bought a T6.1 LWB Highline crew cab, registered August 2021.
Having followed the many adblue threads, I thought it would be interesting to cycle the MFD and check if we have the adblue range info.
Before :
Ignition off, add appx 4.5 litre of adblue. Close up the filler door and jump back in, no wait time.
After :
Adding 4.5ltr gives an additional 2,000 miles, the range is now 6,000 miles.
My man-maths would infer that we have the smaller 13ltr adblue tank.
Having followed the many adblue threads, I thought it would be interesting to cycle the MFD and check if we have the adblue range info.
Before :
Ignition off, add appx 4.5 litre of adblue. Close up the filler door and jump back in, no wait time.
After :
Adding 4.5ltr gives an additional 2,000 miles, the range is now 6,000 miles.
My man-maths would infer that we have the smaller 13ltr adblue tank.
Probably you are right, but I would not trust it. Mine is a 2023 model and it never told me how much to add. The output is always as in your second picture, albeit in km. Range only.
In the last year it has always shown between 31000 and 32000 km of range. When I brought it to the VW dealer they just topped it up. At least I believe that because nobody was able to tell me anything when i picked it up . Anyway the situation never changed, always 32000 range. So after about 5000 km i have trown in another 5 l, very slowly and being careful not to fill it.
I did another 5000 since. I am going to put in another 5 l jar soon. You have to rely on filling sound and some dip stick. I heard somewhere that they have given up calculating the adblue volume, they just put on a bigger tank and now they rely on you keeping it always more or less full. Only if you let get close to the minimum then you get in a bunch of troubles, it may never come back to function properly . So seems to be the last VW technology.
BTW i bought the Bus used but directly from VW, it is not modified in any way, the regens happen regularly every 250 km or so the adblue gets consumed at about 1 l every 1000 km, very roughly.
Below is a screenshot of live data done about 1000 km ago. The calculated volume of the tank is 28 l (
)The last value (level in mm) is now about 1.5 mm less and changes slightly shacking the Bus, so the sensor seens alive.
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chopper_harris
Member
Adblue is not related to DPF regeneration, it is injected post DPF when the exhaust system is at operating temperature and you are driving under load.
If you view the adblue injection quantity in real time via VCDS you will see the amount varies significantly between load and steady state cruise.
Several diesel engine manufacturers use PAT or Eolys fluid which is injected into the diesel tank to improve the burn efficiency during regeneration.
If you view the adblue injection quantity in real time via VCDS you will see the amount varies significantly between load and steady state cruise.
Several diesel engine manufacturers use PAT or Eolys fluid which is injected into the diesel tank to improve the burn efficiency during regeneration.
