P0201, P0202, P0203, P0204, P0205, or P0206
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 detects the injector control circuit is open for greater than 4 seconds or for a cumulative of 30 seconds.