VW Golf 4 14 16v AXP 2001: Energy Check Light On Despite Lambda & EGR Replacement

Hello, I am asking for advice. I have a VW golf 4 14 16v AXP 2001 engine. The Energy check indicator appeared to me.
The first replacement diagnosis of the lambda courts.
The second diagnosis is EGR replacement.
The mechanic stated after the test that the exhaust emissions were too high. But the engine is working properly, it does not cut, it does not go out, the revs are correct, everything would be ok if it was not for the light. After removing the error, it turned on after 130 km, after the next removal after 70 km. Someone has encountered such a problem. The mechanic suggested cleaning the catalytic converter but it did not help.

How is he diagnosing it?

The indicator really just informs that the engine controller is not able to keep the exhaust gases normal
What about this mix? Too poor, too rich? What specific error? Do you have LPG?

He did not give me the error code. But allegedly, I quote the mechanic, "too high exhaust emissions," as the reason after replacing the lambda and the EGR said that the catalyst should be cleaned. And the indicator light continues to appear.

Added after 2 [minutes]:

He did not give me the error code. But allegedly, I quote the mechanic, "too high exhaust emissions," as the reason after replacing the lambda and the EGR said that the catalyst should be cleaned. And the indicator light continues to appear. I don't have gas, petrol 95 is refueling.

Added after 3 [minutes]:

Could it be the second probe after the catalyst? At least the mechanic would recognize it in the error code? I definitely have to change the mechanic because this one has now added costs and zero effects.

Dan8 wrote:

I definitely have to change the mechanic because this one has now added costs and zero effects.

A very good decision

There is a video on this page showing how to clean. https://www.dpf.mielec.pl/regeneracja-katalizatorow/

Mileage, hmm, probably strange for such an old car, but it has 188,000.

Hello, today I visited a new mechanic, two errors popped up 16785 18010. Anyone have ideas for the reason?

Added after 1 [hours] 44 [minutes]:

Error 18010 may be because I deleted the error by disconnecting the minus from the battery and hence this error.

Added after 1 [minutes]:

I am more puzzled by error 16785 because egr is a new new lambda probe .. Someone encountered this problem

EGR control is? opens and closes?

I left the car with a mechanic today, maybe he will find the reason. The Egr was set up last week, the new one is working fine and still the bug pops up. The mechanic claims that the problem is in the collectors. I'll find out tomorrow because he's supposed to check it out.