BMW fault code 5F21
Dynamic stability control
In the dynamic stability control, code 5F21 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.
DSC: Engine management: interface (5f21 Motronic error Error in engine speed signal CAN message)
Module version: Dynamic stability control DSC8 (DXC8)
DSC: Control module, internal (DSC software ECU-internal Software requests only EBV)
Module version: Dynamic stability control Plus DSC8 (DXC_83)
In: X3 (E83) 2003–2010
Reading and clearing it
Fault code 5F21 is a BMW code, stored in the car's dynamic stability control, 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 dynamic stability control is on: 3 Series (E36), Z3 (E36/7), 3 Series (E46), X5 (E53), X3 (E83), Z4 (E85), Z4 (E86)
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