Same problem here after a complete xenon retrofit on a B8.5 2013 Avant. I changed the BCM1 with the DH one, xenon headlights, and installed the auto-level sensor in the rear left of the car as specified in Etka. After the retrofit, the xenon lamps are working correctly but everytime I start the engine, I receive the error “ Headlight range control defective” with no specific error in on the 09 Central Electric, just the “
01312- Powertrain data bus”. I think it has something to do with the codings. I noticed that the headlights does not perform the self-test (up and down max limits) when I start the engine as it supposed to do, they only do this test when I try to reset the
01312 error. The error appears again instantly after reset.
Please help!
I will return with a full scan in a few hours.
Thank you in advance,
Razvan