BMW fault code 00A1
Engine electronics
In the engine electronics, code 00A1 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.
Output stage fuel injector valve cylinder 12
Module versions: Motor Electronics (DM5212R5), Motor Electronics (DM5212R6)
In: 7 Series (E38) 1994–2001
internal: knock module 3
Module version: Motor Electronics (BMSS501)
In: 3 Series (E36) 1990–2000
Output stage fuel injector valve cylinder 12 OBDII error !!
Module version: Motor Electronics (DM528DS0)
In: 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006
DME: Engine-throttle position controller, jammed permanently
Module version: Motor Electronics (MS430DS0)
In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, 5 Series (E39) 1998–2003, X3 (E83) 2003–2010, X5 (E53) 1999–2006, Z4 (E85) 2002–2008
DME: Internal DME fault: knock control (internal Knock signal path)
Module version: Motor Electronics (MSS54DS0)
In: 3 Series (E46) 1998–2006
Reading and clearing it
Fault code 00A1 is a BMW code, stored in the car's engine electronics, 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 engine electronics is on: 8 Series (E31), 5 Series (E34), 3 Series (E36), Z3 (E36/7), 7 Series (E38), 5 Series (E39), 3 Series (E46), Z8 (E52), X5 (E53), X3 (E83), Z4 (E85), Z4 (E86)
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