Fault light flashing

Mrb friends;
After adding 1 liter of diesel to my vehicle, the malfunction light is on 3.4 gears and turns on after 3.4 seconds.

Hello teacher, first of all, if you start by learning the fault code, we can give clear answers. intake fuel - diesel filter - injectors - turbo - throttle etc. this can cause malfunctions.

I now have a light that disappeared from the instrument panel that looked at the friend. The heating indicator does not light up.

hmm i think there is a problem with glow plugs.

The 3 name malfunctions that were connected to the machine appeared and taken care of it. But it did the same again. We started to think that it was a fuel problem.

So, in what parts did my teacher break those three faults? may be related to fuel, of course

The clutch socket is disconnected and the spark plugs have said too much spark plugs they said, but the spark plugs said normal, but the change has changed in the clutch socket, but in the same time it sounds like the same and the engine power drops then it does not resolve to normal.