Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

C0045 00, C0050 00

The ignition is ON.
Ignition voltage is greater than 9.5 volts.

C0045 5A, C0050 5A

The ignition is ON.
Ignition voltage is greater than 9.5 volts.
The brake pedal is not pressed.
A DTC is not set for the other wheel speed circuit on the same axle.