MacBook Air 13 (mid 2013) Kernel_task process hangs CPU usage - 350%?

Question

macOS

I have a MacBook Air 13 (mid 2013). Worth the latest version of Yosemite. While working, the Kernel_task process unexpectedly started and began to slow down the system and took away RAM resources. The work got up, yesterday I killed a day on a Google search for this problem, I tried many ways and nothing brought results. What can you recommend, friends, can anyone come across this problem? I mainly used this method:
1) Open System Information (under Apple icon in upper-left, click About This Mac, click More Info)
2) Click System Report button, under Hardware, find your "Model Identifier" -remember this for later use
3) Navigate to /System/Library/Extensions an right-click, Show Package Contents of IOPlatformPluginFamily.kext
4) Open Contents/PlugIns and Show Package Contents of ACPI_SMC_PlatformPlugin.kext
5) Open Contents/Resources
6) Find your MacBookAir?_?.plist (?= your model identifier from step 2) and delete the file
7) Reboot! Remember, anytime you do a System Update, you may need to repeat this process
My model ID is MacBookAir6,2. There is nothing similar and close ... there is a MacBookAir5_1, but mine is not. how to be?
https://youtu.be/KZVaVaLOIWM