BMW fault code 0049
Engine electronics
In the engine electronics, code 0049 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.
Throttle valve potentiometer
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 11
Module versions: Motor Electronics (DM5212R5), Motor Electronics (DM5212R6)
In: 7 Series (E38) 1994–2001
Speed signal
Module version: Motor Electronics (BMS43DS0)
In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006
DDE: Speed sensor, injection pump (IWZ system)
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 11 OBDII error !!
Module version: Motor Electronics (DM528DS0)
In: 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006
DME: Signal, mass air flow sensor, implausible
Module version: Motor Electronics (MSS54DS0)
In: 3 Series (E46) 1998–2006
Reading and clearing it
Fault code 0049 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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