BMW fault code 6040

Parking brake

In the parking brake, code 6040 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.

EMF: DSC interface: Signal invalid

Module version: Parking brake (EMF_70)

In: X5 (E70) 2006–2013, X6 (E71) 2008–2014, X6 (E72) 2009–2011

Parking brake control unit:signal from right servomotor implausible

Module version: Parking brake (EMF_89)

In: Z4 (E89) 2009–2016

DSC INTF EMF S1

Module version: Parking brake (EMF_E65)

In: 7 Series (E65) 2001–2008, 7 Series (E67) 2002–2008, 7 Series (E66) 2002–2008

Reading and clearing it

Fault code 6040 is a BMW code, stored in the car's parking brake, 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 parking brake is on: 7 Series (E65), 7 Series (E66), 7 Series (E67), X5 (E70), X6 (E71), X6 (E72), X1 (E84), Z4 (E89), 3 Series (E90), 3 Series (E91), 3 Series (E92), 3 Series (E93)

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