Conditions for Running the DTC

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The ignition is ON or the engine is operating for more than 3 seconds.
No other LAN errors are present.
DTC P0864 runs continuously once the conditions are met.