Alright, here's what happened...I had been driving down the highway for about an hour prior to this happening with no problems, but when I came to a complete stop at a traffic light and then accelerated, once the rpm's hit 1400 there was a loud thud and then my car went into limp mode. I pulled off to the side of the road and turned the car offand then back on and it was no longer in safe mode. So I pressed down on the gas pedal and I could feel that the car was in first because it started to slowly crawl but once again once the rpm's hit 1400 there was a loud thud and it went into safe mode again. It continues to do this unless I let the car gain a little speed (~5-7 mph) but then when I try to accelerate the car seems to be going into 3rd 4th and overdrive randomly as I press the gas pedal and after about 45 seconds of it going crazy it then goes into limp mode. My reverse works fine but everytime I hit 1400 rpm when first accelerating there is a loud thump and it goes limp. I got ahold of a guy with a vag com to pull some codes and reset them and this is what came up:

Original Codes ECU[/b]

Sunday,23,September,2007,20:12:09:01947
VAG-COM Version: Release 704.1

Address 01: Engine
Control Module Part Number: 4D0 907 557 D
Component and/or Version: 4.2L V8/4V MOTR AT D05
Software Coding: 01273
Work Shop Code: WSC 00214
9 Faults Found:

18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
18098 - Malfunction Indication Light (K83): Electrical Malfunction
P1690 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16685 - Cylinder 1: Misfire Detected
P0301 - 35-10 - - - Intermittent
17546 - Fuel Trim: Bank 2 (Add): System too Lean
P1138 - 35-10 - - - Intermittent
17544 - Fuel Trim: Bank 1 (Add): System too Lean
P1136 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16685 - Cylinder 1: Misfire Detected
P0301 - 35-10 - - - Intermittent
18032 - MIL Request Signal Active (Check TCM for errors too!)
P1624 - 35-00 - -

Readiness: N/A

Original Codes TCM[/b]
[/b]
Sunday,23,September,2007,20:13:33:01947
VAG-COM Version: Release 704.1

Address 02: Auto Trans
Control Module Part Number: 4D0 927 156 K
Component and/or Version: AG5 01L 4.2l4V USA D29
Software Coding: 00002
Work Shop Code: WSC 02314
5 Faults Found:

17090 - Transmission Range Sensor (F125): Implausible Signal
P0706 - 35-10 - - - Intermittent
17114 - Gear Ratio Monitoring: Incorrect Gear Ratio
P0730 - 35-00 - -
17114 - Gear Ratio Monitoring: Incorrect Gear Ratio
P0730 - 35-00 - -
17114 - Gear Ratio Monitoring: Incorrect Gear Ratio
P0730 - 35-00 - -
18169 - Shift Lock Solenoid (N110): Short to Ground
P1761 - 35-10 - - - Intermittent

Recurring ECU Codes:[/b]

Sunday,23,September,2007,20:20:48:01947
VAG-COM Version: Release 704.1

Address 01: Engine
Control Module Part Number: 4D0 907 557 D
Component and/or Version: 4.2L V8/4V MOTR AT D05
Software Coding: 01273
Work Shop Code: WSC 00214
1 Fault Found:

18098 - Malfunction Indication Light (K83): Electrical Malfunction
P1690 - 35-00 - -

Readiness: N/A


I'm hoping it's just something electricaland that seemsto bethe most plausible because the transmission will shift gear's if I get it up to speed but it seems to have trouble choosing a gear to go with. Any help would be great, thanks.

 

I got the some problem.
did you fix it?
how?

 

I have same problem... I was qouted $5000 by Audi to replace the TCM...

Control Module Part Number: 01J 927 156 CR
Component and/or Version: V30 01J 2.0l 5V RdW 2011
Software Coding: 00001
Work Shop Code: WSC 21000
1 Fault Found:
17090 - Transmission Range Sensor (F125): Implausible Signal
P0706 - 35-00 - -

Anyone knows how to fix these units ?

 

Would love an update on the limp mode thud problem you are having. My A8 is doing the same exact thing but only with slightly harder then normal braking.

 

i have a 1999 a8 that use to take off recently i have lost two computers the car has 13000 original miles the poor design of audi has lead to this problem the drain gets clogged and backs up into the computer of the car for such a great car why such a bad design anyone know of any recalls or information about audi remiting the problem please let me know

 

You guys need to get a hold of tozo on the quattroworld D2 forum. He's the master of these...