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Replaced Headlight Error Message

Marler1337 Sep 2, 2020

  1. Marler1337

    Marler1337 Registered User

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    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?

    [​IMG]
     
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  3. mike170

    mike170 Registered User

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    New headlight would require coding using vcds


    Sent from my iPhone using Tapatalk
     
  4. JohnM100

    JohnM100 Registered User Gold Supporter VCDS Map User

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    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?
     
    Last edited: Sep 3, 2020
  5. Marler1337

    Marler1337 Registered User

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    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.
     
    Last edited: Sep 3, 2020
  6. AlS3BE

    AlS3BE Registered User

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    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.
     
  7. JohnM100

    JohnM100 Registered User Gold Supporter VCDS Map User

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

    DJAlix VAG Car Coding™ Limited Site Sponsor Gold Supporter VCDS Map User VAG Can Professional ODIS (Offboard Diagnostic System)

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    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.
     
    AlS3BE and T-1000 like this.
  9. Marler1337

    Marler1337 Registered User

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    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!
     
  10. Marler1337

    Marler1337 Registered User

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    --Update---

    Turns out it was not the same headlight which was why it was throwing up the errors FYI.
     
    JohnM100 likes this.

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