Chosen Solution
So lately my macbook has been running very slowly, so i decided to check the intel power gadget and saw that the CPU frequency is stuck at 0.5 Ghz. After doing multiple smc and NVRAM resets, reinstalling macOS and wiping the hard drive clear, i decided to look into the temperatures a bit more with iStat Menus and HWmonitor. After installing those programms my assumption was correct and the sensors were either showing 128C or no values at all. Do i maybe have to replace the sensors?
Running it through the Apple Diagnostics shows the following 3 errors: “The battery requires service (PPT004)” “There may be an issue with the power management system(PPN001)” “The may be an issue with the System Management Controlls (PFM006) ” Also important to note is that the battery was recently replaced, however the problems arose before that aswell, so this shouldnt be it. Replacing the battery back to the old one continues to show 2 out of the 3 errors excluding PPT004 These are the results that the application coconutbattery gave me for the new battery.
And these are the results that the app gave me for the old battery .
Ive seen similar posts about people having insane fan rpm but weirdly enough mine behaves normally and doesn’t spin at all. It only does going through Apple diagnostic, since the cpu is probably throttled down and doesn’t build up that heat.
Your system is in CPU Safe Mode! Thats when the SMC has lost access to one or more sensors so to protect the system it ramps up the fan and lowers the CPU’s clocking. So the diagnostics popped three errors! The battery requires service (PPT004) - Who’s battery did you install or if you went to someone to have it done they may need to replace it. There may be an issue with the power management system (PPN001) - This often follows with the PPT004 error. Sometimes its the charging control logic on your logic board that has an issue. The may be an issue with the System Management Controller (PFM006) - This is just a generic error when the sensors are messed up. At this point I would install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see Adding images to an existing question so we can look deeper into the battery and the charging logic. Make sure you have the MagSafe charger plugged in and the battery is in charge.
