Conditions for Setting the DTC

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

A condition that sets a BCM DTC C0472 or C0473 is present.
The marker pulse signal was low at less than +/-10 degrees of steering wheel angle and the steering wheel angle has changed more than 30 degrees.
The marker pulse signal was high at greater than +/-10 degrees of steering wheel angle and the steering wheel angle has changed more than 30 degrees.
No change in Phase A or Phase B signals and the steering wheel angle has changed more than 30 degrees.
The SWPS Phase A, Phase B, or marker pulse circuits have an open, short to ground, or short to battery voltage.