Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0300-P0304 are Type B DTCs.
When the MIL is flashing, the injector may be disabled for the misfiring cylinder to protect the catalytic converter. Depending on the conditions that set the code, the engine may go into Open Loop.