S6, runs rough & EPC and Traction Control lit
 

Symptoms are not entirely consistent each time this triggers...but the dash lights up

<img class="img-node" src="http://farm8.staticflickr.com/7302/12037818533_f037d5ace7_b.jpg" style="width: 1024px; height: 768px;">

I think the first few times this happened was under moderate to heavy throttle, and the last time was light to moderate throttle.

The engine stutters, and more throttle seems as if it is fighting against the traction control system (could be my imagination).

VAG shows what I think are a few critical codes:

ddress 01: Engine Labels: Redir Fail!
Part No SW: 4F1 910 552 A HW: 4F1 907 552
Component: 5.2L V10/4V FSI ª0040
Revision: 59H09--- Serial number:
Coding: 01050009190F0160
Shop #: WSC 06133 444 52622
VCID: 22401958FD32910EA27-8077

5 Faults Found:
008196 - Intake Manifold Flap; Bank 1
P2004 - 002 - Stuck Open - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 116173 km
Time Indication: 0
Date: 2014.01.03
Time: 16:44:46

Freeze Frame:
RPM: 2012 /min
Load: 40.4 %
Speed: 93.0 km/h
Temperature: 60.0°C
Temperature: -6.0°C
Absolute Pres.: 1010.0 mbar
Voltage: 13.716 V

005476 - Throttle Actuator (J338)
P1564 - 002 - Under-Voltage during Basic Setting - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 117275 km
Time Indication: 0

Freeze Frame:
RPM: 85 /min
Load: 55.7 %
Speed: 0.0 km/h
Temperature: 90.0°C
Temperature: 46.0°C
Absolute Pres.: 990.0 mbar
Voltage: 10.160 V

000545 - Angle Sensor 2 for Throttle (G188)
P0221 - 008 - Implausible Signal - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 0
Fault Frequency: 3
Reset counter: 255
Mileage: 117275 km
Time Indication: 0
Date: 2014.01.16
Time: 21:08:53

Freeze Frame:
RPM: 2736 /min
Load: 32.5 %
Speed: 57.0 km/h
Temperature: 99.0°C
Temperature: 20.0°C
Absolute Pres.: 980.0 mbar
Voltage: 14.097 V

005715 - Please check DTC Memory of ABS Controller
P1653 - 008 - - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 0
Fault Frequency: 8
Reset counter: 255
Mileage: 117275 km
Time Indication: 0
Date: 2014.01.16
Time: 21:08:53

Freeze Frame:
RPM: 2756 /min
Load: 29.0 %
Speed: 57.0 km/h
Temperature: 99.0°C
Temperature: 20.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.716 V

006435 - Please Check DTC Memory of ECU Number 2
P1923 - 008 -
Freeze Frame:
Fault Status: 01101000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 117490 km
Time Indication: 0
Date: 2014.01.19
Time: 14:42:48

Freeze Frame:
RPM: 148 /min
Load: 63.9 %
Speed: 0.0 km/h
Temperature: 37.0°C
Temperature: 35.0°C
Absolute Pres.: 980.0 mbar
Voltage: 10.287 V
-------------------------------------------------------------
Address 03: ABS Brakes Labels: 4F0-910-517.lbl
Part No SW: 4F0 910 517 P HW: 4F0 614 517 P
Component: ESP 8.0 quattro H05 0070
Revision: 00000000 Serial number: 00000000000000
Coding: 0020920
Shop #: WSC 02325 785 00200
VCID: 3162E614A8D43A962BD-8064

1 Fault Found:
01314 - Engine Control Module
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 3
Fault Frequency: 8
Reset counter: 10
Mileage: 117275 km
Time Indication: 0
Date: 2014.01.16
Time: 21:08:53

Freeze Frame:
Hex Value: 0x3900
Hex Value: 0x4002
Hex Value: 0x0025
Hex Value: 0x01A9
Hex Value: 0x00FF

-------------------------------------------------------------
Address 11: Engine II Labels: Redir Fail!
Part No SW: 4F1 910 552 A HW: 4F1 907 552
Component: 5.2L V10/4V FSI ª0040
Revision: 59H09--- Serial number:
Coding: 01050009190F0160
Shop #: WSC 06133 444 52622
VCID: 22401958FD32910EA27-8077

2 Faults Found:
008197 - Intake Manifold Flap; Bank 2
P2005 - 002 - Stuck Open - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 116173 km
Time Indication: 0
Date: 2014.01.03
Time: 16:44:47

Freeze Frame:
RPM: 2014 /min
Load: 39.6 %
Speed: 93.0 km/h
Temperature: 60.0°C
Temperature: -6.0°C
Absolute Pres.: 1010.0 mbar
Voltage: 13.716 V

005715 - Please check DTC Memory of ABS Controller
P1653 - 008 - - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 0
Fault Frequency: 8
Reset counter: 255
Mileage: 117275 km
Time Indication: 0
Date: 2014.01.16
Time: 21:08:53

Freeze Frame:
RPM: 2755 /min
Load: 29.0 %
Speed: 57.0 km/h
Temperature: 99.0°C
Temperature: 20.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.970 V

I did a search for threads and found several that seem helpful:

1) https://www.audiworld.com/forums/sho...2762508&page=2
2)https://www.audiworld.com/forums/sho....php?t=2796173

Would like to hear your thoughts, but the links seem to point towards a vacuum leak.

I am going to try to nurse it this week and chase it next weekend. Any other suggestions are welcome!

From my experience I can tell you that the low voltage, ABS module and the DTC codes for ABS and ECU #2 are connected and caused by low voltage. Your battery may be going out. I had the same DTCs when it got really cold and my battery was old.

To clear the ECU #2 code you will have to first clear all codes from ABS module. So you will have to clear the codes at least twice.

As for the flap and the TPS that may be related and it's a bad news as the manifold flap must be replaced and it is pretty expensive.

Just clear the codes and then see if the TPS and manifold flap comes back.