C0035 00-C0050 00

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

A short to ground, or an open/high resistance is detected on the wheel speed sensor 12-volt reference circuit.
A short to voltage, short to ground or an open/high resistance is detected on the signal circuit.
Wheel speed sensor power supply is less than 7.6 volts.
A missing wheel speed sensor signal