Conditions for Setting the DTC: P2119
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
The ECM determines that the throttle valve did not return to the rest position within 500 mS. The condition exists, then a 5 second delay for MIL ON.