nissan serena V24 diesel engine wont start

[harveyking]

i have an nissan serena V24 diesel YD25 engine. it suddenly stop running. tried to start it but failed.
i change the whole engine to a surplus one. initially it starts but suddenly stop. connect it to launch X431
and it shows fault code 0073 P3 pump comm line.
what si the problem and what should i do?
can anybody advice help. thanks

[autoden]

immo fault?

[Meat-Head]

Ffs changed the engine to a surplus one without checking anything, tow it to your nearest branch of Home - Meat-Head-Motors.co.uk (http://www.meat-head-motors.co.uk) and insert coin.

[harveyking]

it started first with the surplus engine then stop. i was thinking maybe got airlock. tried to bleed it but wont start now.
somebody said it might be the shot off valve did not open anymore. how to make it function again?