BMW fault code 0004
Digital Sound Processor
In the digital sound processor, code 0004 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.
DSP: Digital Sound Processor: fault stored (unknown diagnostic command received)
Module version: Digital Sound Processor (DSP)
In: 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
Error external RAM right
Module version: Digital sound processor (DSP2)
In: 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
Checksum fault, controller flash
Module version: Digital Sound Processor (DSP2_R)
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.
Top-DSP: Control-module fault (checksum error controller flash)
Module version: Digital Sound Processor (TOPDSP)
In: X3 (E83) 2003–2010, Z4 (E85) 2002–2008, Z4 (E86) 2006–2008
Top-DSP2: Control module: internal fault 4
Module version: Digital Sound Processor (TOPDSP2)
In: X3 (E83) 2003–2010, Z4 (E85) 2002–2008, Z4 (E86) 2006–2008
Reading and clearing it
Fault code 0004 is a BMW code, stored in the car's digital sound processor, 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 digital sound processor is on: 7 Series (E38), 5 Series (E39), Z8 (E52), X5 (E53), X3 (E83), Z4 (E85), Z4 (E86)
Coming soon
Enter your email address to hear when AutoLingo for BMW is ready.