The setting of DTC codeP0093 OBD2 indicates that the ECM (Engine Control Module) has detected a fuel exhaust in the high pressure part of the motor. When the engine is running, the ECM monitors the fuel and fuel pressure that goes from the injector pump to all the injectors.
When the ECM detects a considerable and a sudden decrease in fuel pressure in the system, it establishes this diagnostic code. Said fall must be external, internal or a wrong signal by a sensor to the Engine Control Module. When this occur, you enter the safety mode, then you stop the work of the fuel injector pump and it will take a minute for the engine to turn off. The motor can be turned off in any time and regardless of the speed. It may work again, but you must correct the problem.