P20EE, P204F Fault Codes - Main dealer, Warranty, - SHOCKING !!!

[Lee540]

Blocked inlet manifold or runner open/closed fault will throw up the flashing coil light. My 2018 van with now 103k on the clock started doing this. The van goes into limp mode and has no power.

My van currently in the garage having the inlet manifold replaced. Part £380, 5 hours labour. I'll try and get a photo of the old part but my Transporter specialist says he is seeing more and more of these.

I also have the P20EE, SCR fault on long journeys.. plus filling the ad blue tank, correct procedure to reset the mileage and then after 30-40 miles the van pops up with 650 miles until no start before resetting itself after another 30-40 miles. I've had the EML light on maybe 10-15 times since August 2023, I reset it myself with Carista after a few days. It doesnt seem to affect the running.

I do wish I'd bought an older T5.1.. all of the emission electronics on the Euro6 T6 are terrible!

 

[jimc91]

“If they don't find a fault they will move on and consider an EGR Flush again debatable who pays”

Croydon VW did my flush and change of EGR pipe on the extended warranty - has yours ever been flushed?

 

[Lubrown]

from what I am being told by VW Dealers and VW Assist is that which ever mechanic looks at the issue they are not allowed to go "off-piste" or use their experience and initiative.

‘CoMpuTer SayS NO!’

Don’t you just hate it when bean counters wrestle full control of a business? Like they ever fix anything.

 

[Dm85]

You could get it mapped out and not have to worry about ad blue. Heard of loads doing it rather than the costly adventure of getting add blue system repaired. It’s a joke they fail so prematurely and throw issues from factory to the customer

My thoughts exactly, very strange reasoning to start thinking air inlet. As stated van drives fine just constant errors when on a steady run cruising at 70 at 2000 rpm

2019 T6 T32 DSG Kombi 56k miles, will grab engine ref when light

So far:
Had software update back in May 23 inc Adblue vouchers
Had glow plug 3 replaced
Had Adblue pump performance tested x 2
Had injector replaced
Had numerous forced regens

All without success.

Each and every VW Assist Tech have said Adblue pump or system

Got nowhere to go with this. Don’t know why they can’t fix. Surely can’t be that difficult

Others have mentioned try another dealer but can’t get in locally until May and I still believe they are limited to the same VW methodology

Any thoughts?

 

[Hilly64]

Blocked inlet manifold or runner open/closed fault will throw up the flashing coil light. My 2018 van with now 103k on the clock started doing this. The van goes into limp mode and has no power.

My van currently in the garage having the inlet manifold replaced. Part £380, 5 hours labour. I'll try and get a photo of the old part but my Transporter specialist says he is seeing more and more of these.

I also have the P20EE, SCR fault on long journeys.. plus filling the ad blue tank, correct procedure to reset the mileage and then after 30-40 miles the van pops up with 650 miles until no start before resetting itself after another 30-40 miles. I've had the EML light on maybe 10-15 times since August 2023, I reset it myself with Carista after a few days. It doesnt seem to affect the running.

I do wish I'd bought an older T5.1.. all of the emission electronics on the Euro6 T6 are terrible!

Or a very early T6 which I believe were euro5. Thought I was being clever future proofing against all major cities introducing Ulez zones and subsequent tax

 

[Hilly64]

‘CoMpuTer SayS NO!’

Don’t you just hate it when bean counters wrestle full control of a business? Like they ever fix anything.

That’s about right

You could get it mapped out and not have to worry about ad blue. Heard of loads doing it rather than the costly adventure of getting add blue system repaired. It’s a joke they fail so prematurely and throw issues from factory to the customer

That is on my list of options but at this point in time dont see why I should and bothered it would render remaining guarantee void albeit it seems forking useless anyway

“If they don't find a fault they will move on and consider an EGR Flush again debatable who pays”

Croydon VW did my flush and change of EGR pipe on the extended warranty - has yours ever been flushed?

Never had a flush. They have measured the egr and said it was within limits. I thought they would possibly suggest that next so was surprised when they started talking inlet manifold.

Does the all in warranty cover egr flush ….. anyone know?

 

[Dm85]

Funnily enough I noticed the P20EE code the other day just doing a routine scan. It hasn’t returned but I will change the o2 sensor. worth doing to regulate fuel supply/efficiency and maybe a potential cause

 

[jimc91]

That’s about right

That is on my list of options but at this point in time dont see why I should and bothered it would render remaining guarantee void albeit it seems forking useless anyway




Never had a flush. They have measured the egr and said it was within limits. I thought they would possibly suggest that next so was surprised when they started talking inlet manifold.

Does the all in warranty cover egr flush ….. anyone know?

It did for me but they (Croydon VW) also said normally everyone gets one free on VW as it’s known fault. Mine is a 2018 and they fitted a new EGR pipe free as well as they have been redesigned; worth checking if you have the new version, if not insist they change it as it’s an obvious admission that the old design is flawed - there’s a good thread on here with pictures showing the difference

 

[mbuxton]

Hey @Hilly64 , Seems I'm having the same issues as you right now on my 17 Plate T6 150 Kombi with ~70k miles.



In December, after getting to the low warning on my Adblue system and filling up with a new batch of Adblue, I had the EML pop up after about 50 miles of driving. Explained the following to VW Assist the first time. I assumed it was related to the AdBlue crystalising on a sensor, ran some checks, reset the code and got back in contact if it happened again. Driving around locally, with no issues whatsoever, head across the country, and 300 miles into the drive, the EML pops up again.

VW assist calls out again, various checks, and two days later, the van goes to have a major service under the all-in plan as it was due and to look at the error code. Their initial thought was it was the NOX sensor / EGR clean / change pressure sensor 3. Advised me to book back in to check it all out in 2/3 weeks when they could fit me in. I didn't want to wait that long; I took it to a local independent who had found my EGR flexi pipe had completely split. They changed that, thought all was resolved.

After driving nearly 1000 miles, the longest being down to Newquay from Devon ~50 miles each way, nothing all seemed fine. Another long journey, 350 miles sticking at 70mph on cruise, near the same location, EML pops up. VW Assist called out the third time at mine for a good hour and a half, running through all their mobile test plans. EGR checked out to perform as expected and confirmed no loss of power, writing up the following on their breakdown report

Found p20EE00 - SCR Nox efficiency below threshhold, software up to date, checked flow throught EGR > all ok. Cyl 3 glow plug pressure sensor + cha required - TPI 2057802/1

Took the van to my nearest garage which has repaired a lot of T6s, said it could be a whole host of issues, similar to what you've had changed and they could start it but would advise if I didn't want to go down the route of repairs that they couldn't guarantee fixed it to code it out, which I don't really want to do.

Van is going into the local "Transporter" specialist garage that changed my split EGR pipe garage again this Friday as Plymouth Van Centre has shut down, with my only options being Exeter or Newquay to use the warranty / all-in plan that are not taking diagnostic bookings until April (Currently in discussion with VW customer services as Assist and two of their customer support agents have told me that due to the VW assist responding to my breakdown there should be a priority booking in < 3 days to any VW centre; otherwise they will face fines as they are not holding up their franchise dealership terms, but the dealers not wanting to take the vehicle in as it wasn't towed there)

I'll let you know the outcome of what the local garage says, to share if it could help, but it looks like I could be in the midst of what you've gone through, and then it's booked into the main dealer at the start of April before my warranty runs out at the end of the month...

 

[Hilly64]

Hey @Hilly64 , Seems I'm having the same issues as you right now on my 17 Plate T6 150 Kombi with ~70k miles.

View attachment 230304

In December, after getting to the low warning on my Adblue system and filling up with a new batch of Adblue, I had the EML pop up after about 50 miles of driving. Explained the following to VW Assist the first time. I assumed it was related to the AdBlue crystalising on a sensor, ran some checks, reset the code and got back in contact if it happened again. Driving around locally, with no issues whatsoever, head across the country, and 300 miles into the drive, the EML pops up again.

VW assist calls out again, various checks, and two days later, the van goes to have a major service under the all-in plan as it was due and to look at the error code. Their initial thought was it was the NOX sensor / EGR clean / change pressure sensor 3. Advised me to book back in to check it all out in 2/3 weeks when they could fit me in. I didn't want to wait that long; I took it to a local independent who had found my EGR flexi pipe had completely split. They changed that, thought all was resolved.

After driving nearly 1000 miles, the longest being down to Newquay from Devon ~50 miles each way, nothing all seemed fine. Another long journey, 350 miles sticking at 70mph on cruise, near the same location, EML pops up. VW Assist called out the third time at mine for a good hour and a half, running through all their mobile test plans. EGR checked out to perform as expected and confirmed no loss of power, writing up the following on their breakdown report



Took the van to my nearest garage which has repaired a lot of T6s, said it could be a whole host of issues, similar to what you've had changed and they could start it but would advise if I didn't want to go down the route of repairs that they couldn't guarantee fixed it to code it out, which I don't really want to do.

Van is going into the local "Transporter" specialist garage that changed my split EGR pipe garage again this Friday as Plymouth Van Centre has shut down, with my only options being Exeter or Newquay to use the warranty / all-in plan that are not taking diagnostic bookings until April (Currently in discussion with VW customer services as Assist and two of their customer support agents have told me that due to the VW assist responding to my breakdown there should be a priority booking in < 3 days to any VW centre; otherwise they will face fines as they are not holding up their franchise dealership terms, but the dealers not wanting to take the vehicle in as it wasn't towed there)

I'll let you know the outcome of what the local garage says, to share if it could help, but it looks like I could be in the midst of what you've gone through, and then it's booked into the main dealer at the start of April before my warranty runs out at the end of the month...

wow that is so familiar!!!!!! , yes please keep me in the loop and I will update you also. DM me by all means or on this thread for everyone else's benefit

going round in circles with complaint

• VW Customer "don't" Care. Claims handler has no grasp of the issue and problems and the madness of the situation even though I have been very clear in my email
• Dealer has the hump re wording on my email. so I pointed out that they have had at least four attempts to sort without success, what's the issue? TBF they say they want to help but their hands are tied as unable to spend time looking for an intermittent fault without being paid and VW Warranty will only play when they prove a faulty component. Even suggesting possible new engine WTF. can see a £5k bill easy without engine or even getting to the bottom of things
• Still asking for a blank cheque to investigate inlet manifold and egr. A £1,000 bill right there with no guarantee they will find or fix the fault. They won't or can't escalate and refer a Technical Case until I have authorised the above checks.....why not is my question?. In essence I want it referring now so I can have someone, hopefully with the skill set, to sort or experience of these issues which from this one thread alone is clearly not uncommon
• I have a price for new AdBlue delivery module replacement and Adblue injector replacement, £1,200 but their tech is absolutely convinced this is not the issue and states I will be wasting my money
• They even questioned adblue quality stating that the standard of adblue varies and can affect the system. Surely can't be that sensitive besides which it was last filled at a Main Dealer under the voucher scheme and the error was there before and after. I am sure I read somewhere that adblue was still a patented formulae developed by the Germans so should all be to a similar standard.
• I feel I am slowly heading towards the adblue delete and ditch the Warranty option but on a matter of principle I am still reluctant to roll over but would rather have a compliant vehicle than not at this stage.
• My warranty runs out end of May 24

 

[sorcos]

I would agree, my EML has come on 3 times with the P20EE code, the first time it was flushed and a new ERG pipe fitted, the next two times ( a year between) was whilst on the continent driving in very hot weather (once with the 650 miles warning). Both times I reset it and it never came back, whereas if it was a true fault it would surely pop up again.

on my VCDS I used the option
IDE04732 "Check of SCR efficiency"
After the checking procedure, everything is working as it should. (light went out)
Is this option available in the Carista app?
I'm going overseas soon and I wouldn't want to take my laptop with me, only the Carista cube.
Please help

 

[jimc91]

on my VCDS I used the option
IDE04732 "Check of SCR efficiency"
After the checking procedure, everything is working as it should. (light went out)
Is this option available in the Carista app?
I'm going overseas soon and I wouldn't want to take my laptop with me, only the Carista cube.
Please help

With the carista you can scan and get the fault codes and then use it to clear them so definitely take it with you. I think in my case if it was a major fault the code would come back immediately rather than a year

 

[Bigsidavies]

on my VCDS I used the option
IDE04732 "Check of SCR efficiency"
After the checking procedure, everything is working as it should. (light went out)
Is this option available in the Carista app?
I'm going overseas soon and I wouldn't want to take my laptop with me, only the Carista cube.
Please help

I always take my VCDS and little netbook when I go away. Doesn’t take up much space and may save a load of heartache.

 

[Howzat]

on my VCDS I used the option
IDE04732 "Check of SCR efficiency"
After the checking procedure, everything is working as it should. (light went out)
Is this option available in the Carista app?

It's an option in OBD11 so would be suprised if it isn't an option in Carista too.

 

[sorcos]

It's an option in OBD11 so would be suprised if it isn't an option in Carista too.

Can any Carista users confirm this with a screenshot?

 

[Sioux101]

These vehicles are great when they work, but nightmares when the go hey wire.

This maybe unconnected but my new 1 year old T6.1 Lwb was good but then threw a rear wheel ABS sensor.

VW Assist guy have a shift, jacked it and biffed in sensor and spun it, still no response.

He then said some vans had faulty spades crimped down below battery in a wiring centre causing all sorts of weird issues.

It took the auto spark 3 days(all warranty). He followed VW map but knew it was a dead end but had to do it.

1/2 a day, remade the crimps and plugged in and bingo!

 

[Hilly64]

These vehicles are great when they work, but nightmares when the go hey wire.

This maybe unconnected but my new 1 year old T6.1 Lwb was good but then threw a rear wheel ABS sensor.

VW Assist guy have a shift, jacked it and biffed in sensor and spun it, still no response.

He then said some vans had faulty spades crimped down below battery in a wiring centre causing all sorts of weird issues.

It took the auto spark 3 days(all warranty). He followed VW map but knew it was a dead end but had to do it.

1/2 a day, remade the crimps and plugged in and bingo!

so you have effectively got 3 days fault finding under warranty but I am being told fault diagnostics isn't included however you are in manufacturers warranty not the All-in-Warranty I guess this makes a big difference. great they got to the bottom of it but realistically on a 1 year old van they have to.

If this reasoning was followed during the extended you would get the faulty crimped spade replace but not the 3 days looking for it. I also believe the all-in excludes wiring amongst other things. Someone else mentioned adblue wiring centre under the drivers seat. But again the dealer wants to start taking off manifolds rather than test wiring harnesses. I suspect they probably haven't got the technical knowledge or expertise to do this anyway.

 

[sorcos]

on my VCDS I used the option
IDE04732 "Check of SCR efficiency"
After the checking procedure, everything is working as it should. (light went out)
Is this option available in the Carista app?
I'm going overseas soon and I wouldn't want to take my laptop with me, only the Carista cube.
Please help

Can anyone tell me why I can't do this procedure? 6 weeks ago 500 miles back I was able to do it and the amber AdBlue light went out. Now I have 650 miles left. Any ideas ?

 

[Hilly64]

UPDATE:

so after last visit to the dealership they found the adblue injector was out of calibration despite being tested on each previous visit so at least four times.

From what I can gather not by very much <5% however enough for the warranty to finally kick in and get it replaced. At this point they were still suggesting stripping the engine to look for other issues at my expense! ... so perhaps a bit of a relief although I was not very optimistic.

Next stage I am sure will be an adblue delete and re-map as the system seem too temperamental and perhaps overly sensitive

I had a pending error logged during the trip home. After a couple of weeks I cleared the errors but they almost immediately came back HOWEVER there has not been any confirmed error or activation of the EML since so without counting too many chickens I am hoping I have a result.

After a few decent runs the pending errors have now gone so assume these only stay "pending" for a given time period or so many stop/start journeys?

 

[YellowHound]

Interestingly, and perhaps the jury should still be out, but I have seen no re-occurrence of my EML since I have been using a fuel additive every time I get fuel.