Conditions for Clearing the MIL/DTC

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

A History DTC will clear after forty consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
The current DTC will clear when the diagnostic runs and does not fail.
Use a scan tool in order to clear the MIL diagnostic trouble code.

Fig 1: DTC P0620 (1 Of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P0620 (2 Of 2)

Courtesy of GENERAL MOTORS CORP.