I am having the above fault code everytime

I have changed the relay it self but no luck and its doing my head in.
Abit of history my Bora was once a measley 1.6 but now a 1.8t AGU.
I didnt complete the conversion myself but under the battery tray I can see that the loom is block connectored up but looks cool to me.
The car runs spot on, I just dont like seeing the fault code I simply cant just ignore this lol its there for a reason.
The pump primes itself when opening the door and starts first time.
I have heard the 1.6 is SIMOS and the 1.8t (AGU) is Motronic what does this mean?
Any suggestions?