Passat fault Code: 18034 Powertrain data bus: Missing message from tcu

[jasear]

Hi,

Ran a scan via vag-com and it came with that fault code.

Its a VW Passat 2000 W reg Auto. When i drive the car from cold then the gear shift from 1st to 2nd and 2nd to first is a bit jerky.

However once its warm then it works perfectly.

Any idea on what might be the problem? Thanks.

[jasear]

As it happens the passenger side front carpet is pretty damp. The TCM is under the carpet, havent had a look at it yet.

Dumb question, but how do I take the carpet off to have a look at the TCM? How do get rid of the dampness? And hw do I identify the source?

I am asking this, as Ive heard this is a pretty common problem and someone here must have gone through this so their help would be greatly appreciated.