Conditions for Clearing the DTC
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
The MSM will clear the DTC as an active malfunction whenever a manual switch is activated and the MSM sees that the sensor input changes by more than 2 counts or 0.02 volts in the correct direction.