BMW fault code D591

Control module, rear-compartment display (gateway)

Long and/or frequent unlocks (Error_Unlock_Long).

Module version: Control module, rear-compartment display (gateway) (MMIFC)

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

Reading and clearing it

Fault code D591 is a BMW code, stored in the car's control module, rear-compartment display (gateway), 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 control module, rear-compartment display (gateway) is on: 7 Series (E65), 7 Series (E66), 7 Series (E67)

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