Conditions for Setting the DTC

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The PSCM detects open, short to ground or short between any of the motor rotational sensor circuits.
The PSCM detects the steering wheel angle is outside the valid range of -720 to +720 degrees.