Light Sensor Defective
 

Hi,

I have a 2005 Audi A6 3.2 with vagcom error:

Friday,16,January,2015,15:49:24:32264
VCDS Version: Release 11.11.3

Address 09: Cent. Elect. Labels: 4F0-910-279.lbl
Control Module Part Number: 4F0 910 279 HW: 4F0 907 279
Component and/or Version: ILM Fahrer H14 0080
Software Coding: 0013123
Work Shop Code: WSC 02335 785 00200
Additional Info: 4F1910113 Wischer AudiC6 H05 0150 4E0910557 REGENLICHTSENSORH10 0040
VCID: E6C92841D17C6C9
1 Fault Found:

02382 - Sensor for Light Detection (G399)
014 - Defective
Freeze Frame:
Fault Status: 01101110
Fault Priority: 2
Fault Frequency: 1
Reset counter: 213
Mileage: 119936 km
Time Indication: 0
Date: 2015.01.16
Time: 15:47:00

I replace the light sensor on the dashboard. The problem is still there.

When the headlights are set to Auto the headlights turn off/on properly. However, the interior dashboard lights do not. They are always off. Any ideas? MMI is updated to the latest.

Thanks in advance.

Did you clear the code and see if it is coming back? And if all of your fuses are good?

Yep, cleared the code. It comes back. No bad fuse. The fuse would power the whole module so other things would fail as well. Is it possible it is a bad comfort module?

Well if you have no error for the comfort module I wouldn't touch it.

If replaced the sensor and I'm
Not replacing the comfort module the only thing left is the harness or could it be coded incorrectly? I checked and it seems in order.

Same issue and same error code G399 with 2006 A6. I pulled the sensor, and the error changed. Based on that ordered a new (expensive!) sensor. Will update when I change it. Did you ever resolve your problem?

Replaced sensor
 

yeah I just replaced the sensor part on the mirror. Fixed it. Found the part used on eBay. Cheap.

For the record, I did the same (after replacing the sensor that mounts inside the upper dash) and bingo, it was fixed.