Sub-par CPU performance, 4SNS-IB0R sensor failure
Hi guys,
My MBP 2011 is currently running at half-speed or so (Geekbench measures just under 50% score of a normal Early 2011), kernel_task usage has spiked leaving the MBP pretty near unusable. I've done the software fix of removing the .plist from the ACPI_SMC kext and now it's sort of usable, but definitely not pre-fix levels of fast. Power button also requires a few tries to get the MBP running, usually on first press the sleep indicator light slowly lights up and switches off.
AHT indicates a 4SNS-IB0R sensor failure, value 9.166. I've cleaned the logic board but issue still remains. SMC reset changes nothing.
Is it possible to attempt a hardware fix by replacing an SMD onboard or is the board junk?
Thanks!
Ist dies eine gute Frage?
Did you get the system wet?
von Dan
Is it the i7 CPU model? @danj - same issue as the 15" but no class action suit for the 13".
von mayer
@Dan: Nope, no water damage or anything.
@mayer: Nope, i5 2.3GHz.
For what it's worth, running Windows 7 under Boot Camp makes the system run fast as it should but I'm not having a MBP to run Windows, that's what my Thinkpads are for.
von DJenCa
Did you scan it with ClamAV? I would even Mac's can get viruses.
von Brian Reeder
Nope, cause this symptom persists even with a swapped HDD and a fresh installation of OSX, and mostly alleviates with removing MacBookPro8,1.plist from IOPlatformPluginFamily.kext. The issue right now is the CPU refuses to run at anything other than bare minimum speed, which I believe is related to the 4SNS-IB0R error?
I might give it a try though.
von DJenCa