Conditions for Clearing 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.

EHPS supply voltage comes back within range (greater than 22 volts or less than 53 volts).
Using the scan tool.
A history DTC will clear after 255 consecutive ignition cycles is the condition for the malfunction is no longer present.