BMW fault code 0020
Lights Module
In the lights module, code 0020 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 Q11/Q12 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
LSZ: Activation, motor for headlight-range adj. 2
Module version: Lights switching center (LSZ)
In: 3 Series (E46) 1998–2006, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
Reserve Block 3
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 0020 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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