BMW fault code 41C1
Diesel electronics slave
In the diesel electronics slave, code 41C1 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.
41C1 exhaust flap control
Module version: Diesel electronics slave (D51SM670)
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.
41C1 Exhaust flap actuator, control
Module version: Diesel electronics slave (D63SM670)
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.
Reading and clearing it
Fault code 41C1 is a BMW code, stored in the car's diesel electronics slave, 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 diesel electronics slave is on: 7 Series (E65), 7 Series (E66), 7 Series (E67)
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