Faulty Fuel Injector
Fuel Injector harness is open or shorted
Fuel Injector circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
The Fuel Injector is an electronically controlled mechanical device that is supplied with pressurized fuel by the fuel pump and when energized atomizes the fuel into a fine mist so that it can burn easily in the engine.
The Engine Control Module (ECM) monitors the Fuel Injector. The ECM sets the Diagnostic Trouble Code (DTC) when the Fuel Injector is not to factory specifications.