Hp fuel pump solenoid resistance value. 2001 313cdi (UK)

Think I got a problem with the high pressure fuel pump solenoid valve on my 2001 313cdi (UK model) it's coming up as open circuit on the OBD2 reader (autel md802) got low pressure at fuel rail and no start. Resistance test of wires to the fuel pump solenoid at ECU gives 22.5 ohms. So not open circuit by a long shot but anyone know what the value should be? And why it would be reading open circuit on the OBD2 reader?
 
Fault code on the autel md802 is

P1188-8 (stored and current) element shut off. High pressure pump cable has open circuit.

Fuel pump part code 733 cn5
 

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