What CPU? If it's an intel CPU that lacks EIST the p4tcc and apci_throttle mechanisms are disabled by default on 10.2 and newer effectively leaving powerd(8) no throttling mechanism to use, hence the error. Equivalent power savings or better can be achieved by using the C-states on such CPUs:
It is important to be exact on these things. Extra or missing letters can change the problem or solution entirely. The same goes for upper and lower case letters.
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