Conditions for Running the DTC

WARNING: This page is about a different car, the 2011 GMC Cab & Chassis Sierra, 2011 Chevrolet Suburban, and 2011 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The ignition is ON.
Ignition voltage is greater than 9.5 volts.
No wheel speed sensor faults exist.
Brake is not applied.
Vehicle is not cornering.
No wheel spinning is detected.