Problem with kernel_task It's about 3 days that I can't do anything with my macbook air because the kernel_task is eating up the CPU. So I found this but the command csrutil disable/enable doesn't work on the terminal (El Capitan) and I found out that some models doesn't know this command but I couldn't find how else I can disable SIP (system integrity protection). 
So the questions is that how can I solve this problem with kernel task?
So after resetting SMC, rebooting safe mode and every other solutions that is suggested on different forums, changing the battery solved the problem!!! By the way, the battery was changed last year and it didnt need repair!!!