BMW fault code 00E9
Engine electronics
In the engine electronics, code 00E9 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.
Catalytic converter overall efficiency bank 1
Module versions: Motor Electronics (MS410DS1), Motor Electronics (MS410DS2), Motor Electronics (MS410DS3), Motor Electronics (MS411DS1), Motor Electronics (MS411DS2)
In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001
Output stage start automatic
Module versions: Motor Electronics (DM5212R5), Motor Electronics (DM5212R6), Motor Electronics (DM528DS3)
In: 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006
Start automation output stage
Module versions: Motor Electronics (DM524DS0), Motor Electronics (DM528DS0)
In: 3 Series (E36) 1990–2000, 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006
DME: Activation, automatic starting
Module versions: Motor Electronics (ME72KWP0), Motor Electronics (ME72KWP1)
In: 3 Series (E46) 1998–2006, 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
DME: Cat.-conv. efficiency, bank 1 (OBDII: P0420; EUIII: P0420)
Module version: Motor Electronics (MS420DS0)
In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, 5 Series (E39) 1998–2003, 7 Series (E38) 1998–2001
DME: Catalytic-converter efficiency, bank 1
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
internal index 85
Module version: Motor Electronics (MSS54DS0)
In: 3 Series (E46) 1998–2006
Reading and clearing it
Fault code 00E9 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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