BMW X5 E70 xDrive, DSC and ABS warning lights
Why are the 4x4, DSC and ABS lights on at the same time on an X5 E70?
The cause is often the transfer case (VTG). When it does not send a signal, several control units set a fault code and the lights come on together. Check the transfer case supply fuse first: it is number 125, shown with a gear symbol in the fuse diagram. Number 126 is not the same fuse.
What do fault codes 5462 and CF80 mean?
Code 5462 comes from the transfer case servo motor, whose plastic gears wear. Replacing the repair kit fixes the fault, after which the system is calibrated with a diagnostic tool. Code CF80 relates to the transfer case, where the chain and friction plates may be worn, or the control box may be dead.
Can the fault be somewhere other than the transfer case?
Yes. Behind a DSC fault there can be a module oxidised by water, which is cleaned, after which the fault codes are cleared. A fault in the throttle body connector wiring can also cause a 4x4 and DSC error as well as reduced power.