BMW fault code 0045
Engine electronics
In the engine electronics, code 0045 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.
Fuel pump relay
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
Knock sensor 2
Module versions: Motor Electronics (BMSS501), Motor Electronics (DM338DS0), Motor Electronics (DM338DS1)
In: 3 Series (E36) 1990–2000, 7 Series (E38) 1994–2001
Catalyst damaging misfire cylinder 7
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
DME: Activation, fuel-pump relay
Module versions: Motor Electronics (MS420DS0), Motor Electronics (MS430DS0)
In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, 5 Series (E39) 1998–2003, 7 Series (E38) 1998–2001, X3 (E83) 2003–2010, X5 (E53) 1999–2006, Z4 (E85) 2002–2008
DDE: Control unit DDE (CAN controller)
Module version: Digital Diesel Electronics (DDE30DS0)
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.
Misfire detection catalytic converter damaging cylinder 7 OBDII error !!
Module version: Motor Electronics (DM528DS0)
In: 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006
Fuel Pump Relay
Module version: Motor Electronics (MS410DS0)
In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001
DME: Signal, knock sensor, cyl. 3-4
Module version: Motor Electronics (MSS54DS0)
In: 3 Series (E46) 1998–2006
Reading and clearing it
Fault code 0045 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)
Coming soon
Enter your email address to hear when AutoLingo for BMW is ready.