BMW fault code 003C
Base module
In the base module, code 003C 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.
GM: Load/consumer shutdown, output VA2: short circuit to ground
Module versions: Base module 5 (ZKE5), Base module 5 (ZKE5_S12)
In: 3 Series (E46) 1998–2006, X3 (E83) 2003–2010, Z4 (E85) 2002–2008, Z4 (E86) 2006–2008, Z8 (E52) 2000–2003
GM IV: Relay sticking signal MFBZ to ground (MFBZ)
Module version: Base module (ZKE4)
In: 3 Series (E36) 1990–2000
Reading and clearing it
Fault code 003C is a BMW code, stored in the car's base 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 base module is on: 3 Series (E36), Z3 (E36/7), 3 Series (E46), Z8 (E52), X3 (E83), Z4 (E85), Z4 (E86)
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