BMW fault code 55C9
Transfer case
In the transfer case, code 55C9 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 (engine torque 1, 0xA8) error, receiver VTG, transmitter DME-DDE
Module versions: Transfer box (VGSG70), Transfer box (VGSG90)
In: 3 Series (E90) 2005–2012, 3 Series (E91) 2005–2012, 3 Series (E92) 2006–2013, 5 Series (E60) 2003–2010, 5 Series (E61) 2004–2010, X1 (E84) 2009–2015, X5 (E70) 2006–2013, X6 (E71) 2008–2014, X6 (E72) 2009–2011
55C9 CAN_MESSAGE_ASC4
Module version: Transfer box (VGSG83)
Reading and clearing it
Fault code 55C9 is a BMW code, stored in the car's transfer case, 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 transfer case is on: X5 (E53), 5 Series (E60), 5 Series (E61), X5 (E70), X6 (E71), X6 (E72), X3 (E83), X1 (E84), 3 Series (E90), 3 Series (E91), 3 Series (E92)
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