Bigbottlebob

OK

Went to start up my garage queen 2009 D3 A8L 4.2 on Saturday
Cranked and cranked, but would not fire. Never did that before. (My D3 S8 did the same thing once, but after I cleared the DTC's all was fine.)
Shut it off, repeat, same result.

Third time it lit up fine, but had CEL and EPC lights.
Ran fine, drove it 120 miles without incident aside from the annoying lights.

Cleared all DTC's, but I keep getting the Camshaft Position Sensor (G40) and resulting EPC lights back in a few seconds.

Any thoughts?

Maybe oxidized connector or just a bad sensor?

See below for relevant scan.

Thanks


00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
06-Seat Mem. Pass -- Status: OK 0000
07-Control Head -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
0E-Media Player 1 -- Status: OK 0000
0F-Digital Radio -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
1E-Media Player 2 -- Status: OK 0000
28-HVAC, Rear -- Status: OK 0000
34-Level Control -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
37-Navigation -- Status: OK 0000
38-Roof Electronics -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
4F-Centr. Electr. II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
61-Battery Regul. -- Status: OK 0000
62-Door, Rear Left -- Status: Malfunction 0010
65-Tire Pressure -- Status: OK 0000
67-Voice Control -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
76-Park Assist -- Status: OK 0000
77-Telephone -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine ( ) Labels:. 079-907-560-BVJ.clb
Part No SW: 4E1 910 560 J HW: 4E1 907 560
Component: 4.2l V8/4V 0010
Revision: 71H22--- Serial number: AUX3Z0H6754440
Coding: 01060009190F0120
Shop #: WSC 02313 785 00200
VCID: 295938848008A30C6F-807C

1 Fault Found:
000834 - Camshaft Position Sensor (G40)
P0342 - 002 - Signal too Low - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 38886 km
Time Indication: 0
Date: 2018.03.19
Time: 18:22:52

Freeze Frame:
RPM: 680 /min
Load: 26.7 %
Speed: 0.0 km/h
Temperature: 86.0°C
Temperature: 36.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.224 V

Readiness: 0110 1101

Bigbottlebob

Problem Solved!
I found the dreaded wiring harness eating rodent error!
Fortunately I was able to splice in four new wires, and all is good now!



Remains of my wiring to the cam position sensor. Fortunately they didnt eat anything else. All codes are clear now!