Conditions For Clearing MIL/DTC

WARNING: This page is about a different car, the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

The DTC will clear after an ignition cycle occurs without the fault recurring.
The Passlock history code clears after 100 concurrent ignition cycles occur without the fault recurring.
Using a scan tool.