September 30: LEMON manuals is back up on a temporary server! Slowness is possible
Section 64 (Engine Control System - 3.8L (DTC P0016 To DTC P0138))
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.