Dipstick Reading High

[mmi]

There are other software versions with different suffixes, so mine is probably just slightly later with the Q suffix?

No, the suffix identifies which engine the software belongs to - the version identifies software modification level. Thus
04L-906-057 identifies only generically an engine software of certain group (possibly related to emission classification)
The suffix e.g. E, H, Q identifies the exact engine the software belongs to - different ones for manual gearbox, DSG, 4Motion+gearbox, usually also vehicle class N1/M1 makes a difference.
Note: in the EU there was an emission regulation change in 2019, which usully meant a different software was introduced. Thus it's quite possible that e.g. engine CXHA of MY16 and MY19 do not run the same software.

Engine (CXFA) Part No SW: 04L 906 057 E
for class M1 vehicle

Couldn't find a scan for "H" but it's obviously a software on some late T6 engines



Source: IFI CP2 Message
(906-020)

Re my ecu software, perhaps it was updated by the dealer last year when I purchased the van, and the version hasn't been added to the ]Welcome to VAG-Flashinfo! site yet.

The site listing is probably based on softwares available from VW for EU market area (on mid-July-2025). However, sometimes the site (and the software distribution package) misses factory installed software - possibly because there has been an urgent update at the time and possibly the software didn't make into software distribution package.

E.g. my first T6 MY16 initially had the following ECU software (which isn't found on the site)

Address 01: Engine (2D2D2-CXFA)​

Part No SW: 04L 906 056 FB HW: 04L 907 445​

Component: R4 2.0l TDI H02 2568​

But was updated within a few months for

Address 01: Engine (2D2D2-CXFA)​

Part No SW: 04L 906 056 KF HW: 04L 907 445​

Component: R4 2.0l TDI H02 3809​

which then got two more updates fairly soon...


Any change to post your vehicle's configuration sticker as it has the emission classification codes?

Post in thread 'Steering column label/build sheet with PR codes'

25 Oct 2023

Hi Everyone, sorry to be resurrecting an old thread but any ideas what 1D1 may mean? Thanks Gary

• gvicker1

Especially interested to what you have got in places of the codes "DN4", "T29", "7MM"

 

[manfrotto]

Over here they don't seem to put the build sticker with PR codes anywhere on the van
However I requested it from the dealer - attached.

It has PR code 4IE for EU 6 compliance, but nothing much else relating to the engine.