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.

Output voltage ratio sensed by the EHPS module rises above 2.734 percent of the excitation voltage.
Using the scan tool.
A history DTC will clear after 255 consecutive ignition cycles if the condition for the malfunction is no longer present.