C0238 GMC but I have not driven truck yet. Will code drop if I drive?
P0238 ECBM detects one wheel speed is greater or less than other speed sensor signal
This depends , what set this code are mismatched tires, under inflated tires or over inflated tires,
Some of the other cause for this code condition would be with the speed sensor or its wheel bearing such as a failing wheel bearing, with excessive play. the toner is also known to corrode affecting the perfromance of the wheel speed sensor
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