307 hdi not starting

[rd070707]

Hi guys, so after my dad put the wrong fuel in his seimens hdi 307 we are having a bit of bother. He got all the fuel pumped put of the tank then replaced the fuel filter and filled it with diesel, and then brimmed the tank. She started first time and seemed to run smooth.

Now after driving a few miles he got eml on with codes p1113 and p1198, the first one is "diesel high pressure monitoring, pressure controller at stop"

I cleared the codes and it drove for another day until this morning when she cut out on him and now won't start.

pp2000 is showing p1113 again and it cleared for me, but looking at live data when I crank it it's saying fuel pressure is measured at zero.

So are we looking at lp pump maybe or even hp pump? Or could it be the regulator?