Conditions for Running the DTC

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The engine is idling at less than 640 RPM and the engine oil pressure sensor performance check is high.
The engine is running at greater than 1520 RPM and the engine oil pressure sensor performance check is low.