Conditions For Clearing 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.

The PCM will turn the Malfunction Indicator Light (MIL) OFF during the first consecutive trip in which the diagnostic has been run and passed.
A current DTC, Last Test Failed, clears when the control module turns OFF the MIL.
The history DTC will clear after the PCM runs and passes 40 consecutive warm up cycles with no failure.
Use the scan tool in order to clear the DTC.