The solenoid shut-off valve is integrated in the injeciton pump and cannot be replaced separately.
The solenoid shut-off valve combines two functions. On the one hand, the engine is shut down with the solenoid shut-off valve, on the other hand, it determines the moment of injection and injection duration. In order to turn off the engine, the solenoid shut-off valve is no longer activated by the pump control unit, i.e. the control orifice in the injection pump is no longer closed so that high pressure can no longer be built up.
Fault code 41 "injection pump solenoid shut-off valve" is stored if the solenoid shut-off valve is defective.
Consequence: Engine shuts down or can no longer be started.