I've been getting the faults listed later on my 2006 A6 2.7 TDi Avant and diagnosed the bank 2 intake manifold (swirl flap) motor as being faulty (that's the one on the right hand side when you stand in front of the car). You could see that it was not doing the same thing as the other motor. There are some good forum entries which have helped a lot in diagnosis.

Found a new motor on eBay, without the flaps. £95, brand new, bargain.
Part number 059129086

I have read on the Ross-Tech wiki that I need to adapt the new motor when I replace it. Motor hasn't arrived yet so tonight I thought I'd just try the adaption instructions using vagcom from the Ross-Tech website which says that it's group 142, in the basic setting of the engine controller. That group is not found, which made me wonder if there is one group number for bank 1 and another for bank 2?

Anyone done this before, it seems like a fairly common fault.

<info>
012597 - Intake Manifold Runner Control: Lower Stop not Reached
P3135 - 001 - Upper Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 0
Fault Frequency: 15
Mileage: 217228 km
Time Indication: 0
Date: 2011.06.10
Time: 18:03:08

Freeze Frame:
RPM: 0 /min
Torque: 0.0 Nm
Speed: 0.0 km/h
Voltage: 12.24 V
Duty Cycle: 88.8 %
Duty Cycle: 20.5 %
Duty Cycle: 20.5 %

004120 - Intake Manifold Runner (Bank 2): Lower limit not reached
P1018 - 001 - Upper Limit Exceeded
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 105
Mileage: 217228 km
Time Indication: 0
Date: 2011.06.10
Time: 18:22:03

Freeze Frame:
RPM: 756 /min
Torque: 39.0 Nm
Speed: 0.0 km/h
Voltage: 13.60 V
Duty Cycle: 80.9 %
Duty Cycle: 88.8 %
Duty Cycle: 80.9 %

Adaption procedure from Ross-Tech

Intake Manifold Runner

Prerequisites:

* Ignition ON
* Engine OFF
* System voltage at least 11.0 V.

[Select]
[01 - Engine]
[Basic Settings - 04]
Group 142
[Go!]
Activate the Basic Setting.
[ON/OFF/Next]
Wait until Field 4 shows "ADP. O.K.".
[Done, Go Back]
[Close Controller, Go Back - 06]

* Switch Ignition OFF for at least 60 seconds.