BMW fault code 0021
Cruise control
In the cruise control, code 0021 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.
Toggle bit error
Module versions: Cruise control (FGR2), Cruise control (GR2)
In: 3 Series (E36) 1990–2000, 5 Series (E39) 1995–2003, 7 Series (E38) 1994–1998
FGR: Data line, multifunction steering wheel
Module version: Cruise Control (FGR2_5)
In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, 5 Series (E39) 1995–2003, 7 Series (E38) 1994–1998
Reading and clearing it
Fault code 0021 is a BMW code, stored in the car's cruise 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 cruise control is on: 8 Series (E31), 7 Series (E32), 5 Series (E34), 3 Series (E36), Z3 (E36/7), 7 Series (E38), 5 Series (E39), 3 Series (E46)
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