BMW fault code CF20
Transmission control
In the transmission control, code CF20 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.
Message (wheel tolerance check) from DSC incorrect, receiver DCT/EGS, transmitter DSC/ACC/CAS
Module version: Transmission control (DKG_90)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
EGS: Message fault from ACC, Alive counter: Torque request
Module version: Transmission control (GS1912)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
No message from CAS, receiver DCT/EGS, transmitter DSC/ACC/CAS
Module version: Transmission control (GS19B)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
Message (Wheel Speed PT-CAN, CEh) for (EGS_EL, PT-CAN) from (DSC, PT-CAN)
Module version: Transmission control (GSB233)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
No message (DSC status), transmitter DSC, receiver EGS
Module version: Transmission control (GSF21A)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
No message from network management
Module version: Transmission control unit (SMG_60)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
No message from CAS
Module version: Transmission control (SSG_60)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
Reading and clearing it
Fault code CF20 is a BMW code, stored in the car's transmission 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 transmission control is on: X5 (E53), 5 Series (E60), 5 Series (E61), 6 Series (E63), 6 Series (E64), 7 Series (E65), 7 Series (E66), 7 Series (E67), X5 (E70), X6 (E71), X6 (E72), 1 Series (E81), 1 Series (E82), X3 (E83), X1 (E84), Z4 (E85), Z4 (E86), 1 Series (E87), 1 Series (E88), Z4 (E89), 3 Series (E90), 3 Series (E91), 3 Series (E92), 3 Series (E93)
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