BMW fault code 0046
Lights Module
In the lights module, code 0046 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.
Sporadic error when controlling LWR driver
Module versions: Light/Check Module (LCM), Light/Check Module A (LCM_A), Light/Check Module II (LCM_II), Light/Check Module III (LCM_III)
In: 3 Series (E46) 1998–2006, 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
Error code reserved
Module version: Lights switching center (LSZ)
In: 3 Series (E46) 1998–2006, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
LSZ2: Tail light (E85: direction indicator, front), left, 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 0046 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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