Conditions For Clearing MIL/DTC

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

The Last Test Failed status will clear when the DTC runs and passes.
The AF ECM will turn OFF the MIL after 3 consecutive drive trips that the DTC runs and passes.
The History status will clear after 40 consecutive WARM-UP cycles with NO failures of ANY DTC.
All DTC Information can be cleared with a scan tool.