Chosen Solution

Hi. I maxed out the RAM to 16gb/added an SSD and installed Catalina on it. Fans are loud even on idle with nothing running (with or without activity monitor). I’ve tried iStatistica Pro, TG Pro and Fanny to detect/control fans and detect temperature but none of them help with that. I’m using TG Pro on my MBP 2015 and it works perfectly fine. On TG Pro it says it detects the temperatures for the HDD/SSD but that no fans are /the option is N/A. And in battery health it says ‘this mac does not have an internal battery.’ Unplugging the power adapter confirms that the battery is present but I suspect this is a software bug. Did I &&^& up a sensor something up in the upgrade process? Could it be a software problem? Would really appreciate help figuring out what to do. Thank you.

For anyone having this issue in the future reading this: Someone on reddit suggested checking the battery indicator cable which I noticed wasn’t turning on. It was as simple as opening the lower case, just unplugging that cable with a spudger and plugging it back in. Now the sensors show a high temperature issue that’s probably a thermal paste one and was likely already there but I didn’t have a temperature app to see it. Good luck.

Try a PRAM reset and a SMC reset do the following to reset PRAM on Mac: Turn off your Mac.Press the power button.Immediately press the Command+Option+P+R keys.Hold the keys until your Mac restarts and you hear the startup sound.Release the keys.SMCShut down the computer.On the left side of the keyboard, press and hold the Shift, Control, and Option keys while simultaneously holding the power button.After 10 seconds, release all of the keys.Turn on your MacBook.