Fault codes P20EE and 31103

[andy4prop]

Hi So on our way on holiday for a week to Devon , had the the emissions light come on and with Carista the above codes . Will a software update sort this ? Please see attached Carista download from service menu and photos of expanded fault codes .Have I got the latest software? It’s a 2019 T6 102 5 speed manual 9000 miles only .

Thanks

 

[mmi]

Have I got the latest software? It’s a 2019 T6 102 5 speed manual 9000 miles only .

Yours:

Engine​

Part #: 04L906056KA​

Component: R4 2.0l TDI ​

Software version: 4047​

There is a newer software for the engine.

Welcome to VAG-Flashinfo!

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

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

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...

www.t6forum.com

 

[andy4prop]

Thanks for your prompt reply , 100 or so miles
Further on had adblu fault distance to refill dropped to 650 miles , reset itself after about 20 miles had the following fault codes when I scanned basic obd2 codes P0401, P204F , P20EE and engine codes 23871 , 31103 ,33262 , could these still be software related or do I have a bigger issue ?

 

[mmi]

23871 = P0401 EGR System Insufficient Flow
31103 = P20EE SCR NOx Catalyst Bank 1 Efficiency too Low
33262 = P204F Reductant System Performance Bank 1 Malfunction

The first ones are VW codes, P-codes are OBD-II-standard equivalents.

The AdBlue display distance 650 miles was triggered by P204F. The software update should cure false alarms of the fault.

P20EE itself is more or less harmless - just an indication NOx emissions were above threshold. The software update reduces NOx emissions and thus also reduces P20EE faults.

A common reason for P0401 is clogged EGR cooler, however shouldn't be an issue at 9000 miles. Degree of blockage can be estimated by using engines built-in diagnostic routines. E.g.

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

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 -...

www.t6forum.com

 

[andy4prop]

Thanks mmi, great info, I’ll think I’ll try and get a software update and go from there ,

 

[lebb2017]

For code 31103 check out the below thread - apparently nothing too bad. Please post contents of ”Detailed ECU info" -report (under CaristaService menu)” - there has been an engine software update that should make these faults less frequent.

Fault codes P20EE and 31103

Hi So on our way on holiday for a week to Devon , had the the emissions light come on and with Carista the above codes . Will a software update sort this ? Please see attached Carista download from service menu and photos of expanded fault codes .Have I got the latest software? It’s a 2019 T6...

www.t6forum.com

@n10n here is the detailed ECU info: (I copied it and forgot to take a screenshot of how it was split up on the screen. Hope it is readable!)

ECU info obtained with Carista 8.2.2 for iOS: VIN: WV1ZZZ7HZKH041064 CAN network gateway Part #: 7E0909901 Component: GW-K-CAN TP20 Software version: 0762 ASAM/ODX identifier: [none] Coding: 042305 (hex) [No fault codes] Engine Part #: 04L906056KA Component: R4 2.0l TDI Software version: 4047 ASAM/ODX identifier: EV_ECM20TDI03004L906056KA Coding: 00114010432401090000 (hex) Fault codes: 15916 Manufacturer-specific code 31103 Manufacturer-specific code ABS Part #: 7E0907379P Component: ESC Software version: 0133 ASAM/ODX identifier: EV_Brake1ESCCONTIVN75XGP2 Coding: 557E40982566847FAA75027CA48621E679F100 (hex) [No fault codes] Steering angle Part #: 6R0959654 Component: LENKW.SENSOR Software version: 0070 ASAM/ODX identifier: EV_LWSKLOVW25X Coding: 01 (hex) [No fault codes] Airbags Part #: 7E0959655J Component: VW10Airbag021 Software version: 0018 ASAM/ODX identifier: EV_AirbaVW10BPAVW12X Coding: 000000000000000000000000000000003231 (hex) [No fault codes] Instrument cluster Part #: 7E0920971A Component: KOMBI Software version: 2030 ASAM/ODX identifier: EV_Kombi_UDS_VDD_RM09 Coding: 450B010300 (hex) [No fault codes] Infotainment system Part #: 1K8035150L Component: MU-E-D-ER Software version: 7205 ASAM/ODX identifier: EV_MUEnt4CGen2LGE Coding: 065700003C00000041111101008000001F0000C60000010001 (hex) [No fault codes] Immobilizer Part #: 5K0953234 Component: IMMO Software version: 2030 ASAM/ODX identifier: EV_Immo_UDS_VDD_RM09 Coding: 000002 (hex) [No fault codes] Parking/steering assist Part #: 7E0919475T Component: PARKHILFE 4K Software version: 0212 ASAM/ODX identifier: EV_VW75XParkAssis4K Coding: 10800A (hex) [No fault codes] Central electronics Part #: 7E0937090D Component: BCM PQ25 Max4 Software version: 0762 ASAM/ODX identifier: [none] Coding: E0A4303A0A212031002009742C2B8C500F80708F60444D60330400220800 (hex) Fault codes: 03442 Manufacturer-specific code Battery regulator Part #: 7E0907534 Component: Batt.regelung Software version: 0762 ASAM/ODX identifier: [none] Coding: 030B7A73 (hex) [No fault codes] Adaptive cruise control Part #: 7N0907572C Component: ACC Bosch PQx Software version: 0211 ASAM/ODX identifier: EV_ACCBEGVW361 Coding: 00004000FE0779 (hex) Fault codes: 01132 Manufacturer-specific code 01542 Manufacturer-specific code 01545 Manufacturer-specific code Obtained with Carista 8.2.2 for iOS.

I checked the website:

Welcome to VAG-Flashinfo!

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

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And, does it mean 6163 is the latest version, and 4047 is the original - which I have?

The van is due a service, so I guess it will get checked over anyway but I don't like surprises and it's good to be in the know sometimes

 

[n10n]

I checked the website:

Welcome to VAG-Flashinfo!

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

vag-flashinfo.de

And, does it mean 6163 is the latest version, and 4047 is the original - which I have?

The van is due a service, so I guess it will get checked over anyway but I don't like surprises and it's good to be in the know sometimes

This is correct. Please be aware that usually VW does not update anything unless their diagnostics instructions tell them to. So, in your case the active warning light may lead them to update the software but if it's not on when you take the van in they may just shrug it off. Although this one is actually a campaign so in my understanding they should take it on anyway.

Here's more detailed information about the update:

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

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...

www.t6forum.com

 

[lebb2017]

This is correct. Please be aware that usually VW does not update anything unless their diagnostics instructions tell them to. So, in your case the active warning light may lead them to update the software but if it's not on when you take the van in they may just shrug it off. Although this one is actually a campaign so in my understanding they should take it on anyway.

Here's more detailed information about the update:

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

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...

www.t6forum.com

Thanks a lot. Yes I’ve read through a few threads now. I wonder if they will try to charge me to update the software.
I’ll update here after.

First I need to do some spark plug diagnostics for the other error!