BMW fault code 54C9
Transfer case
In the transfer case, code 54C9 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.
VTG: Temperature sensor
Module version: Transfer box (VGSG70)
In: X5 (E70) 2006–2013, X6 (E71) 2008–2014, X6 (E72) 2009–2011
54C9 temperature sensor on actuator
Module version: 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
Reading and clearing it
Fault code 54C9 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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