A4 (B9 Platform) Discussion Discussion forum for the B9 Audi A4 2017-

Coding for turning on Audi Active Lane Assist (all cars with pre sense)

Old 02-01-2018, 04:04 AM
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Originally Posted by SeyiA
New to the site and to the Audi family. I did the ALA and HBA code on my S5 PP and everything worked perfectly (thanks Mitchfin) my only issue are the two error codes that won't go away, C10ACF2 and U112100. I've searched all over and can't find a way to fix it. Any help will be much appreciated.
I had 3 error codes that I cleared with OBD11 after I was done coding and they have not come back. The module (i.e. A5) with the errors were red instead of green but I don't recall seeing a numerical code. One that I can remember was an Adapation that I changed that was not part of the ALA function.
Old 02-01-2018, 04:01 PM
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I've cleared the code several times and it keeps coming back. Next option now is to undo everything and see if that takes care of it.
Old 02-02-2018, 11:50 AM
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Cleared the code again and issue is gone.
Old 02-07-2018, 05:58 PM
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Originally Posted by SeyiA
I've cleared the code several times and it keeps coming back. Next option now is to undo everything and see if that takes care of it.
Every time I clear the error, it pops right back up as soon as it clears. Every time I cycle the car on and off, the error, "Audi active lane assist malfunction" comes back.
Old 02-07-2018, 06:02 PM
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Originally Posted by SeyiA
New to the site and to the Audi family. I did the ALA and HBA code on my S5 PP and everything worked perfectly (thanks Mitchfin) my only issue are the two error codes that won't go away, C10ACF2 and U112100. I've searched all over and can't find a way to fix it. Any help will be much appreciated.
Getting these same error codes. Any luck? Anyone know?

So a cycle off and on has cleared the error codes (turned car off, got out, waited for everything to go off, restarted). But when I got the warning, there was a green notification. Now there's a grayed out one next to boost at the notbot right. It doesn't kick on. Ugh.

Last edited by friguy3; 02-08-2018 at 11:01 AM.
Old 02-24-2018, 03:39 PM
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Apologies if this has already been answered. Would this work on a 2018 A4 PP? I know I have the pre-sense and all of that, just didn't find many people saying they did this on a 2018 model vs 2017.
Old 02-24-2018, 04:15 PM
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Originally Posted by bk6000
Apologies if this has already been answered. Would this work on a 2018 A4 PP? I know I have the pre-sense and all of that, just didn't find many people saying they did this on a 2018 model vs 2017.
It worked on my 18 SQ5.
Old 02-25-2018, 01:33 AM
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I have to thank Mitchfin for this great thread, now I have Active Lane Assist in my new A4 and I’m discovering OBDEleven too. I think I will have a lot of fun in the next days😃
Old 02-27-2018, 07:25 AM
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My OBDEleven arrives tomorrow so I will be trying this out on the 2018 A4.
Old 02-28-2018, 10:14 AM
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I was able to get it working with the OBDEleven pro and a $30 android phone. The first time I went through everything and got a lane assist malfunction error. I started over and went through all steps again and it worked. The new settings didn't show up in the MMI until I shut off the car, got out, locked it and got back in.

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