Hello,
I got an e-mail reminding me about this topic, asking for information if it was possible for me to solve the problem.
More than a year has passed, and the indicator light is on. I wrote that it lights up after driving about 1 km, there is something about it, although not completely, it always lights up in the same place, just about a kilometer from my home, but it is rather due to the passage of time ... i.e. when the car is standing, it also happens they panted when I go slower because someone is dragging in front of me, it will catch fire closer to the house, but after more or less the same time. When the car is warm, it will light up a few seconds after the engine is started.
As for candles, because someone mentioned them. A few months ago I had a problem with uneven engine operation, one cylinder [I think it is called, because as I have already written, I am not an expert] probably did not work. I gave it to my favorite mechanic, he is good and cheap but he doesn't like diesel and he referred me to the guests what only candles do, they checked me all twice. They changed places and found the candles to be good. It turned out at a diesel specialist that a module was flooded with water. Leaves clogged a drain and the water has collected somewhere. After the replacement, the car ran as it was before the fault and the LED was still on. This mechanic also checked the car under the computer and there are no errors ... and the LED is on. He said I can go to Opel, but they won't necessarily explain where it comes from either, and they'll delete it well.
I will also say that I was with this car several times on a route of about 1200 km, many times 400-500 km.
I wonder if I will ever find out what it is.