BMW fault code 48B3
Engine electronics
In the engine electronics, code 48B3 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.
DDE: Message (ASC2)
Module versions: Digital Diesel Electronics (D50M57A1), Digital Diesel Electronics (D50M57E1), Digital Diesel Electronics (D60M57A0), Diesel fuel electronics (D60TMCA), Digital Diesel Electronics (D62M57A0), Digital Diesel Electronics (D71N47B0)
In: 3 Series (E46) 1998–2006, X5 (E53) 1999–2006
48B3 Message (ASC2)
Module versions: Digital Diesel Electronics (D60M47A0), Digital Diesel Electronics (D60M57D0), Digital Diesel Electronics (D62M57B0), Diesel electronics master (D63MM670)
Which BMWs have these versions depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
DDE: CAN message monitoring ASC2
Module versions: Digital Diesel Electronics (D50M47A), Digital Diesel Electronics (DDE50K47)
In: 3 Series (E46) 1998–2006, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
DDE: CAN message monitoring ASC/DSC2
Module versions: Digital Diesel Electronics (D50M47B1), Digital Diesel Electronics (D50M57B1)
In: 3 Series (E46) 1998–2006, X3 (E83) 2003–2010, X5 (E53) 1999–2006
DDE: message (ASC2, 0x1F0)
Module version: DDE (d71n47d0) (D71N47D0)
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 48B3 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: 3 Series (E46), Z8 (E52), X5 (E53), 5 Series (E60), 5 Series (E61), 6 Series (E63), 6 Series (E64), 7 Series (E65), 7 Series (E66), 7 Series (E67), X5 (E70), X6 (E71), X6 (E72), 1 Series (E81), 1 Series (E82), X3 (E83), X1 (E84), Z4 (E85), Z4 (E86), 1 Series (E87), 1 Series (E88), Z4 (E89), 3 Series (E90), 3 Series (E91), 3 Series (E92), 3 Series (E93)
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