Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. 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.