Fiat doblo 1.9 Suction diesel doesn’t start anymore

Hello to all Have a 01ér fiat doblo with 1,9 l. suction diesel and 110tkm. The vehicle started to go out suddenly about 1 month ago during the ride, after which you could start it immediately again. Even after turning off the time did not jump immediately. This however became worse and worse. So bad that I can hardly get started now. According to the diagnostic device of the fiat it is supposed to be the diesel pump, which is not cheap now. I wanted now before I started a new diesel pump build here to ask if maybe jm had the same problem once and what was possibly the error for it, because I read here in the internet similar problems that were not fixed after a new pump. Ps: during the ride also the red motor control light lit. I am grateful for every advice