MBP late 2013 fan/ kernel_task issue

[amsy]

Hello,

I would like to get your opinion.
I have a MBP late 2013, 13" retina display.
About 6 weeks ago, all of a sudden I started having this problem: slow mac, loud fans and kernel_task over 200%. After a day, all back to normal, and continued on and off like this for a while. I googled it and tried several solutions, up to complete reinstall, but nothing worked. I took it to an official apple service provider in Germany, paid for the diagnose and they told me it was the battery, after 1000 cycles being on its last legs.
But to replace the battery was very costly and by that time, the MBP was functioning normally again. So i decided to wait.

The good news was, they told me because of "stain-gate" i was entitled to have my stained-screen replaced for free. So about a week after the initial diagnose I took my MBP in and they gave me a new screen with case. Perfect. All that time my MBP was working normally again.

Of course, the day after I got my MBP back, with the new screen, the problem came back. Probably just a coincidence. I found a technician to replace my battery, cheaper than at apple. So now I have a new battery and a new screen. But the problem is still there, and this time it doesnt go away, its been constant.

I tried everything again,resetting nvram, smc, reinstall even the popular fix deleting ACPI_SMC_PlatformPlugin.kext (https://discussions.apple.com/thread/7253639)
clean install from bootable usb.
In deleting the platform-plugin, i forgot to enable the SIP on rebooting.

On the clean MBP I ran macs internal diagnostic test, and it came up with no issues. So I ran Etrecheck and it tells me the major issues are the check is Poor performance and SIP is disabled.
Now I wonder how this can be, when I did a complete reinstall? Shouldn't it be enabled automatically?

Every suggestions on this would be greatly appreciated. I have spend days and quite some money on resolving this now. The technician who replaced the battery, thinks its a hardware issue, probably cpu / logic board.

Thanks

 

[Audit13]

Is it possible that the Macbook has been exposed to moisture or dropped?

 

[amsy]

Is it possible that the Macbook has been exposed to moisture or dropped?

[doublepost=1529231320][/doublepost]It could be, but it would have been small, I have had it for 4 years. But not so remarkable I can remember.

Would that make a difference?

 

[Audit13]

[doublepost=1529231320][/doublepost]
It could be, but it would have been small, I have had it for 4 years. But not so remarkable I can remember.

Would that make a difference?

Surface moisture may not cause any immediate issues. Once the moisture dries, the residue left behind can cause surface components to slowly corrode.

I suggest visually inspecting the logic board under bright light for signs of corrosion.

 

[amsy]

Surface moisture may not cause any immediate issues. Once the moisture dries, the residue left behind can cause surface components to slowly corrode.

I suggest visually inspecting the logic board under bright light for signs of corrosion.

Surface moisture may not cause any immediate issues. Once the moisture dries, the residue left behind can cause surface components to slowly corrode.

I suggest visually inspecting the logic board under bright light for signs of corrosion.

Thank you for that. I will do. Just out of curiosity though... any idea why the SIP is disabled on clean install?

 

[Audit13]

SIP should not be disabled by default with a clean installation (i.e. partition, format, install); however, the original post makes reference to a complete reinstall. Perhaps the complete reinstall retained the previous settings.

 

[amsy]

SIP should not be disabled by default with a clean installation (i.e. partition, format, install); however, the original post makes reference to a complete reinstall. Perhaps the complete reinstall retained the previous settings.

That’s what I was thinking.
Update.. without making any changes, over a week ago the problem seems to have solved itself again. My mbpro running normal again. Don’t really understand it, but just happy it is.