Conditions for Running the DTC

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The ignition voltage is between 8-18 volts.
The engine speed is more than 40 RPM.
The ECM driver transitions from ON to OFF or from OFF to ON.