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Whirlpool wic 3c26 pf dishwasher ERROR 2 and 15

Hi!
About a year ago the dishwasher started to crash in some programs and showed error 2. Then we switched to other program and it worked fine for couple of months, then started to show error 2 again. Lately it started to show error 15 or error 12.
When the error occurs, then always the same sound will occur.
Here is the video:
https://photos.app.goo.gl/FWRiUskvZCLMRG91A
I have looked up error 15 and bought new circulation pump. Now I still get error 2 and the same situation happens as in the video.
How can I resolve error 2?
Looking forward for some help!