BMW fault code 001F
Lights Module
In the lights module, code 001F 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.
Control Q21/Q22 LWR.
Module versions: Light/Check Module (LCM), Light/Check Module A (LCM_A), Light/Check Module II (LCM_II), Light/Check Module III (LCM_III), Light/Check Module IV (LCM_IV)
In: 3 Series (E46) 1998–2006, 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
LM: Limp-home operation active SMC left
Module version: Lights Module (LM2_83)
In: X3 (E83) 2003–2010, Z4 (E85) 2002–2008, Z4 (E86) 2006–2008
LSZ: Activ'n, motor for headlight-range adjust. 1
Module version: Lights switching center (LSZ)
In: 3 Series (E46) 1998–2006, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
LSZ2: Coils, stepping motors, faulty
Module version: Light switching center 2 (LSZ_2)
In: 3 Series (E46) 1998–2006, X3 (E83) 2003–2010, X5 (E53) 1999–2006, Z4 (E85) 2002–2008, Z4 (E86) 2006–2008, Z8 (E52) 2000–2003
Reading and clearing it
Fault code 001F is a BMW code, stored in the car's lights module, 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 lights module is on: 7 Series (E38), 5 Series (E39), 3 Series (E46), Z8 (E52), X5 (E53), X3 (E83), Z4 (E85), Z4 (E86)
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