Conditions for Setting the DTC: P2070
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
The control module detects that the IMT valve is stuck open. This diagnostic runs continuous when the above conditions are met.