C0035-C0050 0F,

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The code is set when both of the following conditions exist:

An erratic signal output of the wheel speed sensor is detected.
The EBCM detects a change in wheel speed that exceeds 20 km/h (12 mph) between two 10 millisecond wheel speed samples.
The condition occurs 3 times in 200 milliseconds.