P20EE00 & P040100

[SlothBurger]

In the last 2/3 weeks my 2019 Kombi (CXEB) is showing these faults in Carista. I've cleared them & they come back. One of the faults appears then the other. So far never both faults together.

Previously a few months ago the EGR pipe was changed because it was split but not the cooler part of EGR.

I'm seeing DPF regens about every 150 miles or less & mostly doing long journeys over 1 hour.

Feeling a rumble on idle last few months but I thought this might be the flywheel.

What further troubleshooting steps can I do myself to figure out what's the issue?

 

[mmi]

What further troubleshooting steps can I do myself to figure out what's the issue?

P20EE - please verify that engine controller software is up-to-date.
Please post "Detailed ECU info"-report (under Carista Service menu).

K

Post in thread 'Software up to date?'

18 Sep 2022

Is they away to tell if my vans software is up to date with out going to main dealer?

Engine
Part #: 03L906019GQ
Component: R42,0L EDC
Software version: 8440
ASAM/ODX identifier:
EV_ECM20TDI01103L906019GO
Coding: 01194012232401080000 (hex)
[No fault codes]
ABS
Part #: 7E0907379P
Component: ESC
Software version: 0132
ASAM/ODX identifier:

• kirkm5238

Welcome to VAG-Flashinfo!

VAG Flashfiles Informations - Version check of VAG ECUs - Update check for Audi, Seat, Skoda and Volkswagen

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P0401 - you could run engine's self diagnostic routine to verfiy the issue

Thread '[T6_measured] 01-Engine - Built-in test for EGR'

23 Apr 2023

So it seems - inevitable P0401.

Well, visited a VW garage to be tested - the van had accumulated 30 events in ECU's memory since July 2021 (since 20 months now). Eventually managed turn on the emission light at event number 31 - thus had a priviledge to have EGR flow tested. The result - pending - the ODIS went to an unending loop without a concluding result.

Meanwhile, I think I have reproduced the EGR flow test using VCDS. However, I don't have any reference value to estimate the degree of EGR cooler blockage. Neither did ODIS tell the reference value (should have told but the computer...

• mmi
• egr p040100 t6_measured
• Replies: 84
• Forum: Engine, Gearbox, Exhaust, Drivetrain

• 

 

[SlothBurger]

Here's the output from Carista on the engine ECU detailed info:

CAN network gateway
Part #: 7E0909901
Component: GW-K-CAN TP20
Software version: 0762
ASAM/ODX identifier: [none]
Coding: 042307 (hex)
[No fault codes]

Engine
Part #: 04L906056KQ
Component: R4 2.0l BTD
Software version: 3775
ASAM/ODX identifier: EV_ECM20BTD03004L906056KQ
Coding: 00254014432401080000 (hex)
[No fault codes]

Transmission
Part #: 0BT300046J
Component: DSG DQ500-7F
Software version: 5302
ASAM/ODX identifier: EV_TCMDQ500021
Coding: 0014 (hex)
[No fault codes]

Van was in VW dealer a few months ago for full service & a bunch of other work including any software updates. If it's still not up to date they didn't do what I paid them to do.

For the self diagnostics bit - I don't have VCDS to run the engine self diagnostics. If I've understood the post you linked to correctly I need VCDS to do that.

 

[mmi]

Engine Part #: 04L906056KQ Component: R4 2.0l BTD Software version: 3775

VW has updated ECU software 04L906056KQ version 3775 with

Engine
Part #: 04L997264
Component: R4 2.0l BTD
Software version: 9540

Yes, confusingly in the update also the software identifier "04L906056KQ" was changed to "04L997264" - normally only version number changes.
E.g. in below the new software identifiers can be seen

Post in thread 'Auto Folding Wing Mirrors'

13 Jan 2023

Nothing attached?

Detailed ECU info

ECU info obtained with Carista 711099 for iOS:

VIN: WV1ZZZ7HZHH159040

CAN network gateway
Part #: 7E0909901
Component: GW-K-CAN TP20
Software version: 0744
ASAM/ODX identifier: [none]
Coding: 042307 (hex)
[No fault codes]

Engine
Part #: 04L997264
Component: R4 2.0l BTD
Software version: 9540
ASAM/ODX identifier: EV_ECM20BTD03004L997264
Coding: 00254014436501080000 (hex)
[No fault codes]

High beam assist
Part #: 7E0857511F
Component: FLA
Software version: 0003
ASAM/ODX identifier: EV_HighBeamAssisAU316
Coding: 040401E200000100000000 (hex)
[No...

• Mick

• 

If it's still not up to date they didn't do what I paid them to do.

Well, VW procedure is to do the above-mentioned update only if vehicle suffers e.g. repetitive P20EE fault (active=emission light on).

Another CXEB engine (DSG+4Motion) software update is explained and measured here:

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

6 Jul 2022

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 classified as mandatory but was/will be done if faults (especially P204F, P20EE) show up. So basically the decision is left to service center.

In the paperwork it was mentioned that the update might increase AdBlue consumption slightly - as a compensation free AdBlue fill-ups were offered.

T6s...​

• mmi
• adblue ecu update nox t6_measured
• Replies: 15
• Forum: Engine, Gearbox, Exhaust, Drivetrain

• 
• 

If I've understood the post you linked to correctly I need VCDS to do that.

Correct. Also VW diagnosis tool ODIS does the EGR part of it.

 

[SlothBurger]

VW has updated ECU software 04L906056KQ version 3775 with

Engine
Part #: 04L997264
Component: R4 2.0l BTD
Software version: 9540

Yes, confusingly in the update also the software identifier "04L906056KQ" was changed to "04L997264" - normally only version number changes.
E.g. in below the new software identifiers can be seen

Post in thread 'Auto Folding Wing Mirrors'

13 Jan 2023

Nothing attached?

Detailed ECU info

ECU info obtained with Carista 711099 for iOS:

VIN: WV1ZZZ7HZHH159040

CAN network gateway
Part #: 7E0909901
Component: GW-K-CAN TP20
Software version: 0744
ASAM/ODX identifier: [none]
Coding: 042307 (hex)
[No fault codes]

Engine
Part #: 04L997264
Component: R4 2.0l BTD
Software version: 9540
ASAM/ODX identifier: EV_ECM20BTD03004L997264
Coding: 00254014436501080000 (hex)
[No fault codes]

High beam assist
Part #: 7E0857511F
Component: FLA
Software version: 0003
ASAM/ODX identifier: EV_HighBeamAssisAU316
Coding: 040401E200000100000000 (hex)
[No...

• Mick

• 

Well, VW procedure is to do the above-mentioned update only if vehicle suffers e.g. repetitive P20EE fault (active=emission light on).

Another CXEB engine (DSG+4Motion) software update is explained and measured here:

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

6 Jul 2022

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 classified as mandatory but was/will be done if faults (especially P204F, P20EE) show up. So basically the decision is left to service center.

In the paperwork it was mentioned that the update might increase AdBlue consumption slightly - as a compensation free AdBlue fill-ups were offered.

T6s...​

• mmi
• adblue ecu update nox t6_measured
• Replies: 15
• Forum: Engine, Gearbox, Exhaust, Drivetrain

• 
• 

Correct. Also VW diagnosis tool ODIS does the EGR part of it.

Thanks so much for all the info. Very interesting. Mine has flashed up the yellow EML once since but not for all of the times the P20EE and P2040100 faults have occurred. I cleared them both last time and they instantly came back but with no EML light. Then I ran the engine for a few weeks with "JLM Diesel Extreme Clean" additive in the tank and the faults went away. I've now gone back to running on just diesel again and the P2040100 fault appeared again yesterday. I'd guess my EGR cooler needs replacing. The EGR pipe was previously replaced on it but not the cooler.

Is it only a VW dealer can apply those software updates or could an indie mechanic acquire it and apply?