Action Taken When the DTC Sets

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0300-P0308 are Type B DTCs.
When the MIL is flashing the fuel injector may be disabled for the misfiring cylinder to protect the catalytic converter.
Depending on the conditions that set the DTC, the engine may go into Open Loop.