BMW fault code CDB4
Engine electronics
In the engine electronics, code CDB4 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.
Message (transmission data , 0x3B1) incorrect, receiver DME, transmitter EGS/SMG/DCT
Module versions: Engine electronics (MSD80), Engine electronics (MSD80N43), Engine electronics (MSS60)
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.
No message (OBD sensor, diagnosis status, 0x5E0), DME transmitter, KOMBI receiver
Module version: Engine electronics (MEVD174K)
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.
No message (OBD, sensor, diagnosis status, 0x5E0), receiver DME, transmitter instrument cluster
Module version: Engine electronics (MEVD176K)
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.
PT-CAN, Message (OBD Sensor Diagnostic Status, 0x5E0): Missing, Sender Cluster
Module version: Engine electronics (MEVD17KW)
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.
No message (transmission data 3, 0x3B1)
Module version: Engine electronics (MSD85)
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.
Message (transmission data, 0x3B1) incorrect, receiver DDE, transmitter EGS/SGM/DCT
Module version: Engine electronics (MSV80)
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.
No message (OBD, sensor, diagnosis status, 0x5E0), receiver DME, transmitter KOMBI
Module version: Engine electronics (MVD1722)
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 CDB4 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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