"ENG MAN SYSTEM FAULTY" error

I congratulate everyone's Ramadan feast. I would like to get your ideas about a problem I have recently experienced with my wishes to reach the next nice holidays as Pug family. My Pug 207 1.4 HDI Trendy car, though not always, when it is difficult to press the gas at some times, it automatically cuts the gas itself and lights the service lamp with an exclamation mark in the triangle, and displays the message " ENG MAN SYSTEM FAULTY " on the screen accompanied by beeping beeps and starts to slow down. (already cut off the gas itself) everything is returning to normal. I went to a Bosch Service on the road because it had Pug Planet software. 4 different malfunction records, which are not related to the faulty motor, such as throttle pedal position malfunction, brake sensor malfunction. Doesn't matter on the spot, a little bit of difficulty Since there was a PO station near my house, I was buying the fuel from there, and when the error first appeared, I immediately bought a diesel fuel of 120 TL from OPET on suspicion that it was due to diesel. The problem still persisted. If you have experienced this problem, I would be glad if you share it. I did some research on the internet, but I couldn't find much. I just understood that the message opening was encountering an error in the Engine management system faulty, ie the engine management system. If it doesn't improve after the holiday, I will take it to the service, I wanted to get your opinions before that. Happy holidays again, stay healthy!