Audi A3 2006 (FSI) Misfire issues.

[sc313]

Hi all,

My car has had a diagnostics test performed and it comes back with the four following errors:-

P0300, PO301, PO302, PO304, car has the red battery light on. (also constantly says I need to refuel, even though I have nearly half a tank left)

I've been to the garage with this issue and they said it's a fuel pump issue, would it not misfire on all 4 cylinders if it was the fuel pump? why would it only misfire on three? It's currently at the garage but I've rang around a few more garages and they don't think it's the fuel pump. Just looking for some advice and if anyone else has experienced this issue...