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The ABS light comes on when the ABS detects a concern normally with its readings from the wheel speed sensors. This happens alot in the snow especially if you have been spinning the tires or driving through thick snow. You may just have snow packed in around a sensor causing a reading issue or connector resistance. Try removing the negative battery cable for 15 minutes to clear the memory. If the light comes back on then you need a scan tool to see which codes are stored to know where to start looking for the issue.
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