What does it mean?
Some fuel systems use a separate injector to provide additional fuel during cold starting. This injector is appropriately called a cold start injector. The design of the cold start injector circuit is like that of a regular fuel injector. The cold start injector is turned on by a cold start injector switch and/or the powertrain control module (PCM). When the injector is turned on. a solenoid inside lifts a valve off its seat, allowing the injector to spray fuel. A typical Cold start injector circuit