how to power off the PX2?

I use command “sudo shutdown -h now” to power off but the cooler still run.

Do I use the command “sudo shutdown -h now Tegra B and Tegra A”?

Dear 763659972,
COuld you check this thread https://devtalk.nvidia.com/default/topic/1037759/drive-hardware/-resolved-power-down-of-dpx2-ach/