Seat Ibiza 1.4 6k FL 2001 - Check Engine, Jerking when adding gas.

Hi everyone, I have a problem with my car lately.
Yesterday, while driving, the car could not maintain a constant speed after firing, and while adding gas, the Check Engine light flashed and it suffocated.

Today I did not have the opportunity to drive as much as to fire in the garage, but after firing the car cannot catch for a certain constant speed and the Check Engine indicator does not disappear, so I decided to look under the hood and there, by the engine, I found a disconnected cable and I wonder if it is not the cause of my problem.
I checked the oil level and it is half.

I will add that this does not always happen depending on the car's mood, sometimes it just chokes when I add gas from low revs, but it jerks two or three times and goes normally.

This disconnected hose is a crankcase bleed (emphysema), probably since the air cleaner housing was removed. This will not cause the engine to malfunction, you can feel the exhaust fumes inside, it can be connected. It will not happen without diagnostics.

In fact, this did not turn out to be the cause of the problems, thanks for the help.
Yes for others who would have a similar problem.
The diagnostics showed an error of the 4th cylinder, the mechanic changed the cables to see if the error would jump to the 3rd cylinder because he suspected the cables, but he was still on the 4th cylinder, the car inspection showed from what I understood that the pressure in the cylinders is uneven or too low, and something else there it flooded with oil and offered me to replace the engine. True or not, I don't know, I don't think that the engine with such a failure would work better and sometimes worse.

If the compression pressure is too low or there is a big difference, e.g. due to leakage in the seats or play on the guides, the car may behave like this. But this engine can be repaired, not necessarily replaced.

It is worth checking the injectors first. Since moving the cables did not work, it is better to look for the cause there and not replace the engine immediately ...

I am writing back the solution to the problem only now because I wanted to be sure. The mechanic wanted to stretch me nicely.
The replacement of the coil helped, first I changed the ignition cables in the dark, but it did not work, then the ignition coil went into motion, the problem is gone, I drive for 2 weeks, no matter if the car runs elegantly after a night of rain or not. The coil was covered with resin which was nicely cracked in several places.