Conditions for Clearing the MIL/DTC

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. 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 0620 Diagnosis (Steps 1-4)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC 0620 Diagnosis (Steps 5-6)

Courtesy of GENERAL MOTORS CORP.