Hello if it is rotary with electronics, it is probably because they carry anti -theft proves that the distribution has been in its marks and the pump corresponds to the height.
If the pump is high -pressure common, those pumps should not normally code, but if you bought a second -hand, it is also broken because it is a common evil of those engines (in the Common Rail) anyway, the diesel circuit purges well (with open contact) reviews well the sleeves of the heating returns are usually cracked and drinks air again again. These cases is to catch a rebuilt bomb. If you have pre -pump submerged in the deposit some models take it.