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Old 12-30-2012, 02:27 PM   #17
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Join Date: Jul 2012
Location: Liverpool
Posts: 1,523
My Ride: 320i SE Coupe
Originally Posted by sweetbro858 View Post
Could be thinking of different dash light, but one would come on all the time driving in the snow. Snow got stuck up all in the brakes and by that sensor...
Speed sensors work by detecting changes in magnetic flux density as rotating elements move in and out of the sensor's magnetic field. They are basically permanent magnets with a coil wrapped around them. Anything that interferes, obstructs or bridges the normal gap between the magnet and the rotating element (eg: snow, mud) can have an impact on the voltage of the pulses received by the DME which, in turn, can be interpreted as fault resulting in automatic shutting down of DSC as precaution. So check the cleanliness and integrity of the wheel sensors first.

Last edited by RayPooley; 12-30-2012 at 02:28 PM.
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