Audi A3 8V (2015) Auto Light Switch

[Elliott Slade]

Hi,

New here so not sure if this is the right area for this question.

Recently I have decided to retrofit Auto Lights to my A3 8V as it came with the standard switch (8V0 941 531 AG).

I purchased a brand new rain/light and humidity sensor which i installed (8U095559D) and is working normally, my wipers are coming on when the stalk is pushed forward one and it rains, and also stops when it doesn't.

The issue i am having is with the Auto Light Switch i have purchased (8V0 941 531 Q), when it is installed, the auto lights do not work and after a few seconds an error message pops up saying "Vehicle Lights: Malfunction!"

Can anyone advise to why this is? I'm thinking i may need to do a bit of coding with VCDS and if this is the case does.... can anyone post information on what to activate.

I've attached some pictures below.

Thanks

 

[DJAlix]

Wrong sensor. Needs to be B or C as D is not actually a light sensor, its just a humidity and Rain Sensor.

 

[Elliott Slade]

Wrong sensor. Needs to be B or C as D is not actually a light sensor, its just a humidity and Rain Sensor.

Thank you for letting me know. The advert on eBay said it was a "Rain, Light and Humidity Sensor" so i'll be returning it to them asap.

Does it make any difference whether to purchase a B or C .. i'm guessing C is newer?

Thanks for your help

 

[DJAlix]

Thank you for letting me know. The advert on eBay said it was a "Rain, Light and Humidity Sensor" so i'll be returning it to them asap.

Does it make any difference whether to purchase a B or C .. i'm guessing C is newer?

Thanks for your help

B is for PFL vehicles, ie yours and C is for facelift. You can use either.

Edit: Make sure you also install a gel pad else you will have further issues. Parts details for reference:



*the above data is VIN specific to a facelift car.

 

[Elliott Slade]

Hi Alix,

Ordered the C sensor and fitted it today, am still getting the Lights Malfunction error message, any ideas?

Sensor is working as it has been raining today. Switch however is not allowing to me to adjust brightness of the display whereas it did before

Thanks

 

[DJAlix]

I would need more information about your vehicle. Please pm me with your vehicles VIN number and the part numbers of the bits you have fitted + coding steps completed. I will then take a look and see what can be done.

 

[Dansheff]

I would need more information about your vehicle. Please pm me with your vehicles VIN number and the part numbers of the bits you have fitted + coding steps completed. I will then take a look and see what can be done.

hi DJ Alix what do you think the problem could be.
I'm having the same issue when I switch to auto it shows Malfunction.

I've got a A3 8V 2013 s line
bought C version of the sensor wipers work fine just the lights not auto

Also did some coding before and I got the automatic on my mmi but does nothing

 

[sdb66521]

Sourced my parts for this to be done to my car now. @DJAlix you'll be getting another phone call shortly no doubt!

 

[sdb66521]

Sourced my parts for this to be done to my car now. @DJAlix you'll be getting another phone call shortly no doubt!

@DJAlix OK,, so switch ordered, thought I'd double check sensor, this is what I've got.
If I'm reading this all right, then that sensor is humidity only?
I need same part number but with B or C after it??

 

[DJAlix]

@DJAlix OK,, so switch ordered, thought I'd double check sensor, this is what I've got.
If I'm reading this all right, then that sensor is humidity only?
I need same part number but with B or C after it??

B if you have a pre-facelift car

 

[sdb66521]

@DJAlix mines a 2015 8v.
when did facelifts come in?

 

[DJAlix]

@DJAlix mines a 2015 8v.
when did facelifts come in?

Late 2016.

you have a PFL so need a “B” sensor.

 

[William64]

I have a 2014 A3 8V G-Tron (with Day Running Lights) same problems with after build in.
Do i also need a B or a D model sensor?

 

[William64]

I have a 2014 A3 8V G-Tron (with Day Running Lights) same problems with after build in.
Do i also need a B or a D model sensor?

Sensor now: (I think and see now this is a wrong one 30.01.16 into a 2014 model)
0004 H06
30.01.16 01S
8UD.955.559.B (and it most be a 8U0.955.559.D model i think)

Auto Switch
8V0 941 531 Q
5PR 140514 0689
SW 0032 TSZ CN
HW H005
201307

 

[William64]

Sensor now: (I think and see now this is a wrong one 30.01.16 into a 2014 model)
0004 H06
30.01.16 01S
8UD.955.559.B (and it most be a 8U0.955.559.D model i think)

Auto Switch
8V0 941 531 Q
5PR 140514 0689
SW 0032 TSZ CN
HW H005
201307

VIN: WAUZZZ8V6EA192878

 

[William64]

B is for PFL vehicles, ie yours and C is for facelift. You can use either.

Edit: Make sure you also install a gel pad else you will have further issues. Parts details for reference:

View attachment 202305

*the above data is VIN specific to a facelift car.

@DJAlix could you please check for me what i need for model number sensor?
VIN: WAUZZZ8V6EA192878

 

[DJAlix]

@DJAlix could you please check for me what i need for model number sensor?
VIN: WAUZZZ8V6EA192878

= B

 

[William64]

View attachment 240838
= B

So the 8V0.955.559.B ?!
Whats the differend with the C model?

 

[DJAlix]

So the 8V0.955.559.B ?!
Whats the differend with the C model?

C is not for your car…

 

[William64]

C is not for your car…

@DJAlix
You think the light switch wil work than?
And the front Fog light also

 

[William64]

C is not for your car…

@DJAlix
Just add the new one in (the 8U0955559) but still have the fault code (see photo)

 

[DJAlix]

@DJAlix
Just add the new one in (the 8U0955559) but still have the fault code (see photo)

Hold on, just gonna learn a new language so I can work out what that says… might be a while.

edit: also, you need a B sensor.

 

[William64]

Hold on, just gonna learn a new language so I can work out what that says… might be a while.

edit: also, you need a B sensor.

hahahah it's Dutch
Saying: Automatic drivinglight system mailfunction
The company where i buy it it say the model is a 8U0955559 can use for a B and C, both are the same.
I try to find specialy a B model but it all came out to the 8U0955559 model or a new OEM coded model....

 

[William64]

OEM Part Number:
8U0 955 559
8U0 955 559 B
8U0 955 559 C

Interchange Part Number:
8U0 955 559
8U0 955 559B
8U0 955 559C

Package list:
Rain Sensor 1 pcs
8U0955559
8U0955559B
8U0955559C

For Car:
For Audi A1 2011-2017
For Audi A3/S3 Sportback 2013-2017
For Audi A4/S4/Avant Quattro 2013-2015
For Audi A4 allroad quattro 2010-2016
For Audi A5/S5 Cabriolet 2012-2017
For Audi A5/S5 Coupe/Sportback 2010-2017
For Audi A6/S6/Avant Quattro 2011-2017
For Audi A6 allroad quattro 2013-2017
For Audi A7 Sportback 2011-2017
For Audi A8/S8 Quattro 2014-2017
For Audi Q3 2012-2017
For Audi Q5 2013-2017
For Audi TT/TTS Coupe/Roadster 2015-2017
For Audi RS3 2016-2017
For Audi RS4 2013-2016
For Audi RS5 2010-2016
For Audi RS6 2013-2017
For Audi RS7 2014-2017

Amazon product

Part No.
8U0 955 559 B
Replace Part No.
8U0 955 559 C

 

[DJAlix]

Got a diagnostic scan of the vehicle with this a sensor fitted?

 

[William64]

Got a diagnostic scan of the vehicle with this a sensor fitted?

You mean you or me?
When you need from me than i need to make a new one. The pdf here is with the old old version sensor
Does the automatic switch has to do somthing with it, because i have a same as Ellitiot at the beginning (see his photo) and the fog lights in the front stil not working.
And when i chech the system i can read out a switch without fog light (it say not support)

 

[DJAlix]

No Idea what an 8UD 955 559 B is hardware or software wise. Should be 8U….

Looks like your errors are due to one or a combination of:

1) incorrect sensor hardware / firmware
2) incorrect light switch
3) incorrect coding

 

[William64]

No Idea what an 8UD 955 559 B is hardware or software wise. Should be 8U….

Looks like your errors are due to one or a combination of:

1) incorrect sensor hardware / firmware
2) incorrect light switch
3) incorrect coding

Can you check for me what kind (code) light swich i need?
Think the Q version is not OK for my car (looking at internet it say A3 8V1 models), think i need the AJ model (A3 8VA)
But need one with Fog light front and back, justible light knop, justible dashboard light knop and sure the auto mode (see front side from Elliots model), but his model is a AG so i cannot find the right one now :-(
So 8V0 941 531 AJ or AG model?

 

[William64]

No Idea what an 8UD 955 559 B is hardware or software wise. Should be 8U….

Looks like your errors are due to one or a combination of:

1) incorrect sensor hardware / firmware
2) incorrect light switch
3) incorrect coding

Please note the 8UD i change it yesterday evening for the 8U0 955 559.
But the list you get (told you) is from before i change the sensor, i need to make a new list with this 'new' sensor
Still stay if i have the right model switch ;-)

 

[DJAlix]

At this point I think you need to collect all your current information and post it here if you want help. Having to guess at what’s been done is not really gonna work.

1) scan your car, clear the errors, cycle ignition and scan again, post scan here.
2) detail your coding steps

This will make life easier.

 

[William64]

At this point I think you need to collect all your current information and post it here if you want help. Having to guess at what’s been done is not really gonna work.

1) scan your car, clear the errors, cycle ignition and scan again, post scan here.
2) detail your coding steps

This will make life easier.

Roger

 

[William64]

@DJAlix
Done today
still faults on display

 

[DJAlix]

@DJAlix
Done today
still faults on display

No communication with sensor will be an issue. Not gonna work if your 09 module cannot talk to it. You also have C software on B hardware.

 

[William64]

No communication with sensor will be an issue. Not gonna work if your 09 module cannot talk to it. You also have C software on B hardware.

so B hardware with B software?

 

[DJAlix]

so B hardware with B software?

Yup yup

 

[William64]

Yup yup

@DJAlix
The B / B sensor is in place, but now need the right code for it (i see both B's on the scan)
Because the first setting 02005D is not working we get 3 fault code's (and this was the setting for the 8UD model my first)
The code 00006C gif me just 1 fault code, saying he cannot communcate with the sensor, and still have the fault code and symbol in the FIS display
So i'm almost there but just a small adjust ment but what?

 

[DJAlix]

@DJAlix
The B / B sensor is in place, but now need the right code for it (i see both B's on the scan)
Because the first setting 02005D is not working we get 3 fault code's (and this was the setting for the 8UD model my first)
The code 00006C gif me just 1 fault code, saying he cannot communcate with the sensor, and still have the fault code and symbol in the FIS display
So i'm almost there but just a small adjust ment but what?

Once again please scan, clear errors, scan and post.

 

[William64]

Once again please scan, clear errors, scan and post.

3BREDA = with code 02005D 3 faults
BREDA = with code 00006C 1 fault

And with both headlight swicht on auto position i still get in FIS a fault (see my early photo in dutch)

 

[DJAlix]

Really sorry but I cannot help as i only speak English and Greek.

I need to see a full and unedited auto scan, in English, in order to see what’s going on if you would like assistance.

RLHS coding = xx006C and anything else is incorrect.

*xx = feature coding, example motorway lights, rain lights and auto rain closing.

 

[William64]

Really sorry but I cannot help as i only speak English and Greek.

I need to see a full and unedited auto scan, in English, in order to see what’s going on if you would like assistance.

RLHS coding = xx006C and anything else is incorrect.

*xx = feature coding, example motorway lights, rain lights and auto rain closing.

@DJAlix im so sorry, did it again :-( (dutch version), this morning when i wake up think (shitt) post dutch version, maybe i can remove it before you read it, but you to fast
Anyway i wil make a new scan in English with code xx006C