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Macbook Pro (15" Retina Late 2013) kernel_task CPU overloads and Apple Hardware Test returns PFM006 and PPN001 codes

Recently appeared problem with SMC - fans began constantly spin at max speed even when laptop quite cold. When I opened Activity Monitor it showed that process kernel_task heavily loads CPU (~600%) and System takes over 70% of recources. Problem still persists even after reseting SMC and NVRAM, after reinstall OS X from Recovery partition or from bootable thumb drive on clean drive (re-partitioned). Also it still reproducible on system loaded from external hard drive with installed Mavericks (10.9.2) and in Safe mode


Sometimes problem dissapears without any conditions, but when computer goes to sleep and awakes it reappears. When kernel_task active sleep mode cause system crash and force reloading.


Solutions provided by other users such as moving plists from kext doesn't help. (http://www.rdoxenham.com/?p=259)


I used smcFanControl for few months and it haven't been cause of any problems. When this problem began I did remove it and did all cleaning steps - it didn't help.


After performing Apple Hardware Test two codes had been shown - PFM0006 (SMC related code) and PPN0001 code. Last code doesn't mentioned in Apple knowlege base. Google search also not help. Message for this code - There may be an issue with power management system.

MacBook Pro (Retina, 15-inch, Late 2013), OS X Mavericks (10.9.2)

Posted on Apr 10, 2014 5:45 PM

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15 replies

Jun 6, 2017 5:35 AM in response to Flaviano.reis

Flaviano.reis wrote:


I have the same problem with codes PPN001 and PFM006, Hey apple this is a very expensive machine, please we need a Recall.


MacBook Pro Retina 15" mid 2015

This forum is NOT a channel of communications to Apple. This is a user-to-user technical support forum.


You can use the "Contact Support" link at the top of this page.


You can make a Genius Bar appointment at your local Apple store and discuss your problem with them.


You can use macOS Feedback

<https://www.apple.com/feedback/macos.html>

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Jul 7, 2014 2:35 AM in response to SPCELCTRNCOUTFT

Apple Hardware test declares PFM006 error which is a thermal sensor error. What is basically happening is that kernel is stuck starting and stopping computer intermittently to allow it to cool. So it hogs all cpu resources. However computer is not running hot, SMC Fan controller shows 40-41 degrees Celsius.

Does anyone on this forum know if doing a similar repair will solve my MBA problem? i.e. replacing top case $100 part as opposed to logicboard $300 part... would solve it? Oerwise machine works flawlessly except for a pop up that says an USB port is drawing too much current but apparently this too is directly related to the thermal sensor malfunction.

Can the thermal sensor itself be changed?

Macbook Pro (15" Retina Late 2013) kernel_task CPU overloads and Apple Hardware Test returns PFM006 and PPN001 codes

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