Adblue sensor fault ; £1,000 fix?!

Frogbelly Mullock

New Member
VIP Member
Hi folks,
My engine management warning light came on, and my local VW van dealer advises the sensor in the Adblue tank is faulty following a diagnostic test.
They advise the sensor is integral to the Adblue tank, so to replace the lot will be ~£1,000!
Has anyone had a similar issue and is there a cheaper fix please?
If nothing else it seems very wasteful to bin the entire tank rather than replace the sensor.
 
Get the fault codes read, could be crystals on the sensor, there are additives available to stop this happening. Might also be the P20EE00 fault, get it cleared & see if it comes back again.
 
I can recommend a good Adblue ‘fix’ for you…. get in touch with @Dav-Tec

Please bear with me on this, I know it looks a bit long-winded, but I think it’s worth having a bit of background detail….

My van is the EU6 102 engine with adblue.

Sometime in June the dreaded flashing coil light made an appearance one afternoon when I’d just started the van and I was leaving work! During that journey to drop something off the van was running on limited power. When I restarted the van, the fault had disappeared and all was back to normal for my journey home…. and to be fair, I’ve had no faults since, but after reading the endless nightmare stories on this forum + previous personal experience with a blocked/failed EGR valve, this got me worried that it might be EGR problems?

I contacted @Dav-Tec (Chris) who by now had done a number of very successful jobs/upgrade’s on my van to see if he could work his magic with a possible EGR delete? Unbeknown to me, @Texxaco (Pete) had been having similar issues with his stunner of a T6 and had already had the @Dav-Tec treatment in the way of a EGR and ADBLUE ‘solution’!

At the T6Forum summer camp meet in July, Chris kindly scanned my van and found that the fault was actually with the adblue system and not the devil’s work EGR as I’d suspected…. either way, I wanted the EGR sorting! So I got booked in with Chris to have a custom remap which would include the same EGR and adblue ‘solution’ as Pete’s van.

On the day of the remap, Chris did a scan as he always does prior to any work…. goes through any fault codes with me and when looking back at previous scan’s, Chris discovered that this adblue fault had history and was showing up on most of the previous scan’s. I told Chris as well that I’d very recently noticed the smell of diesel fumes on startup…. not necessarily in the cab, just in general around the van and when we went out on the first data logging run it was clear that something wasn’t quite right?

When we got back to Dav-Tec HQ, Chris found that the rear EGR pipe was split and exhaust gases were p#ssing out into the engine bay and this was causing the boost pressure problem. No problem for Chris, he removed the split pipe, fabricated a couple of ‘delete’ plates from some sheet steel, refitted the lot and we went out on another data logging run. Much better (near perfect) results meant that a new custom map could be written to include the EGR ‘solution’ and away I went.

I’ve been driving around with the new map now for a week…. to and from work and the usual runs and roads so that I could get a comparison with what I had before (which by the way was a generic Pendle map installed by Leighton Vans). Don’t get me wrong, I had no complaints or issues with the previous map…. I’d had it on there for over two years, but because of the running issues, I needed a ‘solution’ and Chris’s custom remap ticked all my boxes.

I couldn’t be happier with the results of the custom map supplied by Chris…. the engine runs free and smooth even from a cold start up and pulls progressively, purposely and smoothly throughout.

I want to thank Chris for going above and beyond as he always does…. and also his very patient wife Tracy for putting up with me on that Saturday!

Cheers, Matt :thumbsup:
 
Thank you very much T6 ARF; I had an Adblue fault last summer, where it was counting down, then went up!
My local VW dealer diagnosed an EGR fault, which they advised they fixed (though the Adblue light was still on when I got the van back, so I was asked to return it for topping up).

All has been fine, but the first long run to the in-laws, with a prolonged stint on the A1 seems to have brought the warning light ght on.

I'll contact @Dav-Tec too; thank you
 
Thank you very much T6 ARF; I had an Adblue fault last summer, where it was counting down, then went up!
My local VW dealer diagnosed an EGR fault, which they advised they fixed (though the Adblue light was still on when I got the van back, so I was asked to return it for topping up).

All has been fine, but the first long run to the in-laws, with a prolonged stint on the A1 seems to have brought the warning light ght on.

I'll contact @Dav-Tec too; thank you
Drop me a message mate I'll get you sorted in no time
 
Hi folks,
My engine management warning light came on, and my local VW van dealer advises the sensor in the Adblue tank is faulty following a diagnostic test.
They advise the sensor is integral to the Adblue tank, so to replace the lot will be ~£1,000!
Has anyone had a similar issue and is there a cheaper fix please?
If nothing else it seems very wasteful to bin the entire tank rather than replace the sensor.
Happened too me...its a defo big earner for them
 
Happened too me...its a defo big earner for them
Hi Ajaxs, sorry yo hear that; I asked them to wipe the fault as advised by forum members and it didn't return.
Slightly apprehensive about the Adblue top up, but added the amount suggested by the EMU and no issues, so can only presume sensor working fine
 
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