If the Powertrain Control Module (PCM) detects an incorrect voltage for the commanded state of the driver, a fuel injector control code will set.
Engine Light ON (or Service Engine Soon Warning Light)
Lack/Loss of Power
The engine may be harder to start
P0200 Chevrolet Description
The Powertrain Control Module (PCM) enables the appropriate fuel injector on the intake stroke for each cylinder. An ignition voltage is supplied to the fuel injectors. The PCM controls each fuel injector by grounding the control circuit via a solid state device called a driver. The PCM monitors the status of each driver.