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.

A history DTC clears after 40 consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures.
The scan tool Clear Info function was used.