Replaced Headlight Error Message

Marler1337

Registered User
Hey guys, got a second hand headlight fitted last week, since then no full beam and the "cornering lights" (fog lights) aren't coming on when turning left or right. The symbol below came up with the error message "Audi adaptive light: system fault!" I had a mate run VCDS and it said that the left headlight wasn't recognised...

Has anyone else experienced this or knows a way to fix it?

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JohnM100

Registered User
VCDS Map User
Gold Supporter
From the dash, I’m guessing you have a MY13, possibly MY14.

Is this a retrofit (as well as replacement) or did you have Adaptive Xenons already? Is your new headlight a like for like replacement to the existing one?

You mention cornering fog light but the Adaptive Xenons have the cornering light as a separate bulb in the headlight cluster as opposed to the fog light.

Assuming you had Adaptive Xenons already, do either or both headlights do a little dance on startup?
 
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Marler1337

Registered User
From the dash, I’m guessing you have a MY13, possibly MY14.

Is this a retrofit (as well as replacement) or did you have Adaptive Xenons already? Is your new headlight a like for like replacement to the existing one?

You mention cornering fog light but the Adaptive Xenons have the cornering light as a separate bulb in the headlight cluster as opposed to the fog light.

Assuming you had Adaptive Xenons already, do either or both headlights do a little dance on startup?


It's an A3 8V 1.4 TFSI 150bhp 64 reg (2015) manual S-Line saloon.

I had adaptive bi-xenon headlights before and replaced it due to damage. As far as I can tell it's a like for like, only difference is they stated it came off an S3.

The vehicle from what I was aware turned on the relevant fog light when cornering and the actual headlights didn't move left or right. Before the error they used to go up and down but not currently.

I've still got the old headlight so if I'm unable to fix it through VCDS I was going to take the modules off from underneath and swap them over failing anything else.

New headlight would require coding using vcds


Sent from my iPhone using Tapatalk

Any idea on what would need to be done exactly. My mate has VCDS but we had trouble finding a code.
 
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AlS3BE

Registered User
Might be component protection. If the old headlight electronics were fine I would swap them over then the car wouldn’t know you replaced the headlight.
would also get it to somewhere like a mot station and make sure the beam is pointing right as you don’t want to blind others.
 

JohnM100

Registered User
VCDS Map User
Gold Supporter
It's an A3 8V 1.4 TFSI 150bhp 64 reg (2015) manual S-Line saloon.

I had adaptive bi-xenon headlights before and replaced it due to damage. As far as I can tell it's a like for like, only difference is they stated it came off an S3.

The vehicle from what I was aware turned on the relevant fog light when cornering and the actual headlights didn't move left or right. Before the error they used to go up and down but not currently.

I've still got the old headlight so if I'm unable to fix it through VCDS I was going to take the modules off from underneath and swap them over failing anything else.



Any idea on what would need to be done exactly. My mate has VCDS but we had trouble finding a code.

If they didn’t dance left and right (admittedly not to the extent as up and down) then I wonder if they were Adaptive.
 

DJAlix

VAG Car Coding™ Limited
Site Sponsor
VCDS Map User
Gold Supporter
VAG Can Professional
ODIS (Offboard Diagnostic System)
If you have not swapped over the modules from the old headlight to the new then do it, else you will need to parameteris, code and adapt the replacement modules. VCDS cannot do this.
 

Marler1337

Registered User
Might be component protection. If the old headlight electronics were fine I would swap them over then the car wouldn’t know you replaced the headlight.
would also get it to somewhere like a mot station and make sure the beam is pointing right as you don’t want to blind others.

If you have not swapped over the modules from the old headlight to the new then do it, else you will need to parameteris, code and adapt the replacement modules. VCDS cannot do this.

Thank you, this makes sense. I'll get the bumper off tomorrow and plug in the old headlight. If that clears the error then I'll swap the modules over and fingers crossed it will be that simple!
 
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