While on the way to ferry one car to a shop with my sister in tow in the RS6, she told me the car was acting funny, and not shifting right. I thought she had it stuck in manual mode. Sure as sh*t, it was slipping bad. PRDLS was all red. Shut it off, went away. Then it slipped bad a few times and got the CEL. If I drove very slowly, it would not slip too bad and would eventually get to highway speed and got her home.

Here are the codes.. . but to me it seems it could be a bad sensor or ground. Ever since I replaced my alternator, batt light has been on but charging and running fine. The low voltage to the ABS module may be a clue. "Incorrect Gear Ratio" is clearly evident of the slippage. I have had the "Gear Recognition Signal" come and go throughout the life of the car, but never an issue about it. Never seen the "load signal" error.

As for the MAFs - they are new, and it does this sometime after going WOT. Not a concern for now.

SO - cast your vote:
Voltage/ground issue
Sensor issue
TC toast, time for ACE


Address 01: Engine Labels: 077-907-558-BCY.lbl
Control Module Part Number: 4D1 907 558 D
Component and/or Version: 4.2l V8/5VT G 0003
Software Coding: 0006752
Work Shop Code: WSC 13876 409 403238
VCID: 2F6DA5B7BDCF6D6088F
3 Faults Found:

16487 - Mass Air Flow Sensor (G70)
P0103 - 001 - Signal too High - Intermittent
17482 - Mass Air Flow Sensor 2 (G246)
P1074 - 001 - Signal too High - Intermittent
18032 - MIL Request Signal Active (Check TCM for errors too!)
P1624 - 008 -

Readiness: 0000 0000
Tuesday,14,August,2012,12:58:37:53793
VCDS Version: Release 11.11.4 (x64)
Data version: 20120807


Address 02: Auto Trans Labels: 01L-927-156.lbl
Control Module Part Number: 4B0 927 156 FL
Component and/or Version: AG5 01L 4.2l5VT USA 0305
Software Coding: 0000002
Work Shop Code: WSC 02195 785 00200
VCID: 76E350D302151CA80B9
1 Fault Found:

17114 - Gear Ratio Monitoring
P0730 - 003 - Incorrect Gear Ratio - Intermittent - MIL ON
Tuesday,14,August,2012,13:00:07:53793
VCDS Version: Release 11.11.4 (x64)
Data version: 20120807


Address 03: ABS Brakes Labels: 4B0-614-517.lbl
Control Module Part Number: 4B0 614 517 AD
Component and/or Version: ESP 5.7 RS 6 2310
Software Coding: 06697
Work Shop Code: WSC 02195
VCID: 63C51987F18799005C7
3 Faults Found:

00532 - Supply Voltage B+
07-00 - Signal too Low
01119 - Gear Recognition Signal
35-10 - - - Intermittent
18265 - Load Signal
P1857 - 35-10 - Error Message from ECU - Intermittent