It is not very common to see the establishment of diagnostic code P0001 OBDII, frequent in vehicles equipped with diesel or direct injection of gasoline.
It is related to the electrical system, as it is part of the fuel volume control system. The fuel system of vehicles is composed of: fuel tank, fuel pump, fuel lines, filter and injectors.
In the case of the fuel pump, its function is to increase the fuel pressure, which is needed in the fuel rail for the injectors to use. Fuel pumps have a high pressure side and a fuel volume regulator that is pressure controlled. When DTC code P0001 OBD2 is set it means that the electrical reading is open.