BMW fault code A4F9
Head-Up Display
In the head-up display, code A4F9 means different things depending on the version of the module in the car. Find your car below; the app shows the right one for yours.
Message error (driving light status, 0x314), receiver HUD, transmitter LM
Module version: Head-Up Display (HUD_60)
In: 5 Series (E60) 2003–2010, 5 Series (E61) 2004–2010, 6 Series (E63) 2003–2010, 6 Series (E64) 2004–2010
HUD: Message (driving light status, 314)
Module version: Head-Up Display (HUD_70)
In: X5 (E70) 2006–2013, X6 (E71) 2008–2014, X6 (E72) 2009–2011
Reading and clearing it
Fault code A4F9 is a BMW code, stored in the car's head-up display, not a generic OBD2 code (P0xxx): a generic OBD2 reader only reaches the engine's emissions faults, so it won't show it. AutoLingo for BMW reads it with BMW's own diagnostic protocols, in plain English, with the details the module stored about it, and clears it after a repair. If a fault comes right back after it's cleared, the problem is still there.
The head-up display is on: 5 Series (E60), 5 Series (E61), 6 Series (E63), 6 Series (E64), X5 (E70), X6 (E71), X6 (E72)
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