These are not the actual part numbers these would be just the prefix's which are stamped/marked onto the parts. nissan parts numbers are a lot longer ei - 15209-2W200AU
Na the guys that has hte ca - is Simpson
you are Sales?
na you pretty much right, but before you pull it down i would contact nissan, you have no hope if you have already pulled it down and its been done by someone else other than a nissan dealer.
You might have got a bad batch of diesel.
Was there a lot of water in the separator??
From my experience the P7 code means (unless you have got it early) you have done damage to your injection pump.
The P7 cone normally comes up after you have had a bad batch of diesel eg, with a heavy dose...