Usta did not understand what this error is FUEL PRESSURE

My car peugeot 207 1.4 hdi vehicle was running late when the engine was hot and sometimes stopped while driving, playing at an idle between 0.8-0.6 rpm, stopping after a while. did not work, but did not work like the master ether, etc. did not work because the pressure sensor is now completely broken or the pump is broken? do you think it will be improved if i bought a pump? I would be very glad if you think of any such problem that happened to you. respect ..

The teacher sensors may have oxidized, if you want, check with contact spray. (note: estimated information)

I live in Cyprus, even the eurodiesel is very dirty, the only fault in the vehicle is the one on top of this fuel pump? I'm afraid that there will be another problem