- 204ps Bi-Turbo CXEB T6 Engine & Turbo problems -

[Dellmassive]

I watched an interesting video on YouTube by a guy called baz meredith (also the channel name). It was titled Fix the faults and the DPF will sort itself out!!!. He was working on a Nissan at the time but the logic will be the same and he did have a T6 in the workshop too. Sure he mentioned something about electrical stuff - maybe it was just the voltage of the injectors? Anyway, a good watch if you have 17 minutes to spare.

Love Baz, a top mechanic from what I've seen.

Been tuning into his Chanel for ages.

baz meredith 🤙

I'm baz and been in the motor trade 🚗 for 25 years and I've seen a lot of changes over the years. Award winning content creator 🏆.... I aim to help as much as I can and pass on some of my tips and tricks I've picked up over the years I carry all aspects of automotive repairs from basic to...

youtube.com

.

 

[Dellmassive]

This may be vid you was referring too...

.

 

[Bigsidavies]

Hey, @Dellmassive just an update, so the DPF guy came out, couldn't do the clean due in part to some electrical errors which seem to be connected to the 5 volt supply and the start of some oil exiting the filler cap (possibly due to pressure) and the engine sounding lumpy at 2500 revs (could be to do with the electrical error now (things are obvs not going in a good direction). Its going in to VW Van Centre Coventry for a diagnostic next week, still not driving it.

I'd say clean the dpf off the vehicle. Get someone to remove it for you then send it over to Darkside Developments to clean and return.
Is the dealer diagnostics visit just to get them to diagnose the oil usage, if so surely you should be getting the oil analysis done first as that's only £50 and may give a good indication of what's going on. I thnk spaffing £500 for VW to tell you how much oil your van is using is nuts unless you are under the all in warranty. Because obviously their next gambit will be that you need a £20k engine swap.

When you say you had to put half a bottle of oil in. Is that because the oil warning light came on? Or is it because you checked the dipstick and it was low? How much oil? Was it half of a 5 litre bottle, 4 litre bottle or a 1 litre top up bottle?

Darkside DPF / OPF Cleaning Service for all Vehicles including Commercial / Agricultural Vehicles

Refresh your blocked DPF using our brand new top of the range "Carbon Clean DCS20" DPF Cleaner

www.darksidedevelopments.co.uk

 

[Lubrown]

This may be vid you was referring too...

.

That’s the one

 

[T6 Bird]

I'd say clean the dpf off the vehicle. Get someone to remove it for you then send it over to Darkside Developments to clean and return.
Is the dealer diagnostics visit just to get them to diagnose the oil usage, if so surely you should be getting the oil analysis done first as that's only £50 and may give a good indication of what's going on. I thnk spaffing £500 for VW to tell you how much oil your van is using is nuts unless you are under the all in warranty. Because obviously their next gambit will be that you need a £20k engine swap.

When you say you had to put half a bottle of oil in. Is that because the oil warning light came on? Or is it because you checked the dipstick and it was low? How much oil? Was it half of a 5 litre bottle, 4 litre bottle or a 1 litre top up bottle?

Darkside DPF / OPF Cleaning Service for all Vehicles including Commercial / Agricultural Vehicles

Refresh your blocked DPF using our brand new top of the range "Carbon Clean DCS20" DPF Cleaner

www.darksidedevelopments.co.uk

Hi, So I weighed the oil bottle and it was around 800-900ml I had put in and it was the light coming on that alerted me it was low (I hadn't had the van long at all at this point).

I wasn't going to do the oil usage thing straight away as there are some faults on the 5V sensor circuit that need looking into that are coming up on the OBD reader, they have quoted £139 for a diagnostic to see what is going on. My plan is to try and get VW to take on some of the cost (if it does end up being engine replacement) using the evidence of multiple failures of this engine configuration. Maybe being stupid but would at least have a go.

If it turns out to be the DPF I will get it cleaned but I think there is more to it. The engine can't even rev smoothly at 2500 atm (possibly to do with the electrical faults)

Wish I'd never set eyes on it... so gutted.

Codes below. Do you think I should cancel VW for tomorrow and do the oil test first then?

 

[T6 Bird]

@Bigsidavies what do you think?

 

[Bigsidavies]

I’m deffo no expert, but there is anecdotal evidence on this forum that your problem could well be turbo-related rather than a worn engine issue.

B

Thread 'Which module does this error relate to? P00AF00: Turbocharger/Supercharger Boost Control "A" Module, Performance'

31 Oct 2024

Or as VCDS reports "16408 - Actuator Module for Turbocharger 1 ".
Which module is actually being referred to?
I have read though the documentation and can see 2 turbos, several actuators and 3 control valves.

It looks like the N75 valve controls the adjustable guide vanes on the high pressure turbo and the turbine bypass flap
and conversely N529 controls them also also as the vacuum lines are interconnected.

Valve N274 solely controls the wastegate.

Does anyone have any details regarding this error?

Thanks.

• Bert69
• Replies: 6
• Forum: Engine, Gearbox, Exhaust, Drivetrain

Have you had a decent garage with good diagnostic skills work their way through those error codes and check the operation of the turbo?
I agree the dpf is a consequence of the oil issue, but until you’ve eliminated other potential oil loss causes the VW oil weight test seems pointless.
But that is just my thought process.

You seem to have jumped straight into thinking that you need a new engine. And reading your posts the only real diagnostic info seems to be from the guy who came to do a dpf clean.
The open circuit faults are usually a sensor or wiring issue I think.

Don’t dive headfirst into a £500 diagnostic fee with VW when the likelihood is they won’t help with any repair costs going forward
.
Have a pause, read plenty of info on the forum and find a good garage that can do a logical diagnosis on the error codes would be my advice.
Do you know anyone who has VCDS who can help you initially, as I appreciate it’s not wise to drive the vehicle.

 

[Bigsidavies]

W

Thread 'Fault code 30251 & 27202 [Resolved]'

10 Mar 2024

Hi, I'm having an issue with my van, the EML is on and glow plug light is flashing and i have 2 faults. I removed the boost pressure sensor and it was clogged with soot, I cleaned it but that didn't have any effect so I have one coming on tuesday, but the 2nd fault with the "open circuit message is there as well. Can anyone shed any light on this or point me in the right direction for where to start checking. Cheers

Sunday,10,March,2024,07:33:12:50404
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 8 x64
VCDS Version: 23.11.0.0 (x64)  HEX-NET CB: 0.4643.4
Data version...

• Will I am
• fuel temperature sensor
• Replies: 12
• Forum: Engine, Gearbox, Exhaust, Drivetrain

 

[Bigsidavies]

This one has many of your fault codes.
You really need a garage to scan with a proper diagnostic tool, delete the stored codes and see what codes are currently active and deal with those.

W

Thread 'Fault Codes'

8 Mar 2020

I have just had the epu checked and it came back with a few fault. I'm just wondering if anybody can shed some light on the faults and if I should ignore and delete them.

33262 - Reductant System Performance Bank 1
P204F 00 [096] - Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear

31103 - SCR NOx Catalyst Bank 1
P20EE 00 [096] - Efficiency too Low
Intermittent - Not Confirmed - Tested Since Memory Clear

25667 - Output for Starter Relay
P0616 00 [032] - Short to Ground
Intermittent - Not Confirmed - Tested Since Memory Clear

25672 - Control Circuit for Starter Relay 2
P3048...

• walkerbout
• fault codes
• Replies: 3
• Forum: VCDS-VagCom / Carista / OBDeleven

 

[T6 Bird]

Hey, I’m going to ring them today to clarify, I wasn’t doing the oil loss just yet. Just a diagnostic to ascertain the exact problems they have quoted £139.

 

[ei-aprilia]

Hey, I’m going to ring them today to clarify, I wasn’t doing the oil loss just yet. Just a diagnostic to ascertain the exact problems they have quoted £139.

For just a few pounds more you could buy a vcds cable of your own .Mine was about £200 from Gendan many years ago. Being a Vag family it has proved especially useful over the years. It's a handy bit of kit. Don't be tempted to buy a fake cable from eBay or Ali express. They are not the same or up to the job!

 

[T6 Bird]

For just a few pounds more you could buy a vcds cable of your own .Mine was about £200 from Gendan many years ago. Being a Vag family it has proved especially useful over the years. It's a handy bit of kit. Don't be tempted to buy a fake cable from eBay or Ali express. They are not the same or up to the job!

The thing is, I'm talking to the previous owners as I only had it a couple of weeks before the probs started and I think a VW print out/ diagnosis of issues would help me prove it was misrepresented at POS. I have an OBD reader (bluetooth) and the car scanner app which seems pretty comprehensive (I can see the codes above on it)...the thing is knowing what to do with it all. I'm pretty good at old cars but these complex new systems do my head in (should have bought another T4/T5 lol, I've had a few). Its really difficult to navigate the best way forward. I'm trying not to jump to the worst conclusions but since finding out about about the shit show that is this engine configuration from 2015-19, its quite hard not to. If you think getting the cable would be a good shout, I can, however its knowing what to do with the readings once I have the that presents the difficulty to me...

 

[Bigsidavies]

In which case the VW diagnostic isn’t such an expensive idea. Your initial write up made it look like you’d booked it in for the oil weight diagnosis.

 

[jakemlewis]

Hello everyone, another one fallen victim to the CXEB engine failure, it’s not using 1L of oil per tank of fuel. Looking for recommendations for where to take it to be sorted, cheers!

 

[mothy]

Hi all. I test drove a 2016 CEXB Caravelle yesterday. A lovely motor to travel in. Its on 155k & has had full 10k annual service, 40k dsg services, new clutch/dmf, timing belt/water pump done & new EGR in 2022 (code ends in F which i think is a newer revision without the problems of the others). Please talk me (my heart) out of putting my hard earned cash forward into a money pit with potential serious issues. My head says all the important work is done & it's got to 155k no problems BUT avoid..

Any advice?

I'll add: used obd eleven & only fault codes were 1 on air con & 1 for a door.. before & after test drive

 

[DXX]

Hi all. I test drove a 2016 CEXB Caravelle yesterday. A lovely motor to travel in. Its on 155k & has had full 10k annual service, 40k dsg services, new clutch/dmf, timing belt/water pump done & new EGR in 2022 (code ends in F which i think is a newer revision without the problems of the others). Please talk me (my heart) out of putting my hard earned cash forward into a money pit with potential serious issues. My head says all the important work is done & it's got to 155k no problems BUT avoid..

Any advice?

I'll add: used obd eleven & only fault codes were 1 on air con & 1 for a door.. before & after test drive

Providing it has enough mileage since the last engine oil change and has not been significantly topped up you can carry out a Millers Oil Analysis. This will show the level of contamination (metallic, soot, fuel and water).
Cost approx’ £45-50. Done with a syringe / tube down dipstick. Cleanliness and accuracy are key, cross contamination and inaccurate / missing data sent to the lab will only produce an inaccurate result.
You will need cooperation and honesty from the vendor.
This is a good indication of the current state not a crystal ball.
If it hasn’t got proof of 10K mile oil changes or less run away, even if it’s one service missed.

 

[mothy]

Providing it has enough mileage since the last engine oil change and has not been significantly topped up you can carry out a Millers Oil Analysis. This will show the level of contamination (metallic, soot, fuel and water).
Cost approx’ £45-50. Done with a syringe / tube down dipstick. Cleanliness and accuracy are key, cross contamination and inaccurate / missing data sent to the lab will only produce an inaccurate result.
You will need cooperation and honesty from the vendor.
This is a good indication of the current state not a crystal ball.
If it hasn’t got proof of 10K mile oil changes or less run away, even if it’s one service missed.

Thanks for the reply. Its annual services stamped in the book, but annual mileage is 15k. Not sure the owner will be flexible enough (& patient enough) for me to do an oil sample.. it's also just been serviced & done under 1k miles since. So I am reliant on their word

 

[Stay Frosty]

Without sounding too nosey it might help if you gave an idea of what you're paying for the van as that particular engine has been known to bankrupt small countries when it lets go.
I've got a 102 5 speed camper so no skin in the game but I do also have a 200 hp 1.6 turbo petrol Astra that has to run on 98 Ron petrol needs GM Dextro fully synthetic engine oil and it just feels like you have to keep an eye on it's vital signs or it will explode into pieces...
If I wanted more urge from a Transporter I would go 150hp and stop there.

 

[mothy]

Without sounding too nosey it might help if you gave an idea of what you're paying for the van as that particular engine has been known to bankrupt small countries when it lets go.
I've got a 102 5 speed camper so no skin in the game but I do also have a 200 hp 1.6 turbo petrol Astra that has to run on 98 Ron petrol needs GM Dextro fully synthetic engine oil and it just feels like you have to keep an eye on it's vital signs or it will explode into pieces...
If I wanted more urge from a Transporter I would go 150hp and stop there.

No worries. £15k for it (caravelle). I am used to driving a 20 year old audi a4 with 240bhp - which i quite like bit it will need a bit spent on it soon.. £15k is not high for some asking prices. The work has been done at a garage I've known for 30 years. They say it's been looked after & they've done egr, timing belt, dsg services, clutch/ dmf

 

[Stay Frosty]

It's difficult to walk away from a deal when your head likes what the vehicle can still do and your heart sees you hurtling along a pothole and traffic free A road, sipping diesel at over 20mpg but then the thought that you came onto this thread knowing that there is another really dark side... no, not them lads... a really depressing wallet rinsing side that this particular engine has... I would keep looking and go for a 150hp version and sleep marginally better at night.