What changes
Module 09 (central electrics (BCM)): long coding, byte 23, bit 6 = 0.
Details
Audi A3 8P (2003–2013). Only for facelift cars (2008–2013): on the 09 module of earlier 8P cars this bit controls something else — check the model year. Needed after fitting license plate LEDs without a resistor. If the fault stays, some cars also need the no-PWM mode (byte 17, bit 7) — Odyx does not change it. The map is based on public 8P coding descriptions and has not been verified by writing to a car. Odyx reads the module coding first and shows the changes. 8P modules answer over TP2.0 (KWP2000) — you need an ELM327 adapter that supports TP2.0. Undo — from the write history.