Conditions For Clearing MIL/DTC

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

The control module turns off the MIL during the third consecutive trip in which the diagnostic ran and passed.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
The history DTC will clear after 40 consecutive warm-up cycles without a malfunction.
Use the scan tool in order to clear the DTC.