Polo 9n 1.9 TDI 2002: Coolant Warning Lamp Persistent Illumination Post Gasket Replacement

Hello, the problem is Polo 9N 1.9 TDI engine code ATD year 2002
Since I made a gasket under the head, the indicator light (engine overheating) burns too high or there is no fluid in the tank. (as in the picture).

The situation looks like this:
After ignition of the engine on a cold at the beginning of the day, the indicator will light up more than once after driving a few kilometers. Later, every firing lights up immediately or after a while. It blinks and a one-time buzzer sounds.
----- Fluid in the tank is topped up even a little over ---

What I did:
1 - I cleaned the tank - Nothing helped
2 - I replaced the tank with a new one - NOTHING HELPED -
3- I measured on one cable from the plug to the tank is the weight with the engine the other goes directly to the meter cube on the right, I gave a jumper from the cable - NOTHING HELP
4 - I gave weight from the engine directly to the meter - NOTHING HELPED
5 - I cut off the cable right next to the clock plug, thinking that it might be damaged somewhere (I measured it with a meter and had a passage but I wanted to eliminate its possible defect) I connected a new cable to the plug at the tank - Nothing helped
6 - I replaced the coolant temperature sensor in the head connector (gray) - NOTHING HELPED
7 - no errors in the computer
8 - I looked at the temperature on the indicator, the pointer stands correctly vertically, on a connected computer the temperature does not exceed 92 degrees.

I HAVE NO CONCEPT WHAT IS GOING ON AND WHAT THIS CONTROL IS LIGHTING FOR. Can there be something with clocks? When I test the clocks on the computer, the indicator lights up and goes off correctly.
----------------- Have any ideas ? -----------------

Jarzabek666 wrote:

The meter may be damaged, soldering plugs often loom in February.

I just pulled down the counter. This is February from plugins. At first glance, it's ok. But for the sake of peace it translates.

Added after 15 [hours] 31 [minutes]:

Yesterday I sold the plugins and it is a success. Today I rode all day and nothing caught fire. Thanks and best regards

It's been a few days and the problem has not returned.

marcin900 wrote:

Jarzabek666 wrote:

The meter may be damaged, soldering plugs often loom in February.

Yesterday I sold the plugins and it is a success. Today I rode all day and nothing caught fire. Thanks and best regards

I read and do not understand the words "soldered plugins" too much, I would guess it is about February sockets on the meter board but what about these plugs ??

gracus7 wrote:

marcin900 wrote:

Jarzabek666 wrote:

The meter may be damaged, soldering plugs often loom in February.

Yesterday I sold the plugins and it is a success. Today I rode all day and nothing caught fire. Thanks and best regards

I read and do not understand the words "soldered plugins" too much, I would guess it is about February sockets on the meter board but what about these plugs ??

It's exactly February sockets, even more precisely the pins of the incoming plug sockets for clocks. Let's not take a word. Everyone knows what's going on, the more a photo is added.

It is not about catching words, I have been struggling with this problem for a long time. the meter was soldered by someone before, but despite this, I improved the February on the plug socket, replaced the container with a new one and then the indicator lights up. Interestingly, after disconnecting the temperature sensor plug, the computer reports a G62 sensor error but the temperature on the meter is still shown. as if the meter would receive information about the temperature from some other sensor. Hands fall because the light still harasses the owner of the polo.

Did you improve February on one or both plugins? I corrected all the pins on both sockets. Try to fix the cable directly to the tank from the meter. I think I described what color because I don't remember anymore.

February all corrected, wires also checked. The question is where the meter receives the signal about the liquid temperature, since the sensor is disconnected. What a car, someone once said that polo is not VW