kernal_task issue and high fans

Discussion in 'MacBook Pro' started by BigiE, Aug 13, 2014.

  1. BigiE macrumors newbie

    Aug 13, 2014
    Hey all,

    Have a macbook pro that the kernal_task is anywhere from 425-500% cpu usage. I have reloaded os couple different versions with same result. Also have issues with fan spinning high at all times. I have ran apple diags and get a error code: 4SNS/1/C0000008: Th1H - - 124 . I have replaced heatsink and fans with no change. I have reset SMC a bunch of times. No change. Im at a loss with this system.:( Any ideas

    :apple:Macbook Pro A1286:apple:
    Snow leopard (also have trying mavrick)
  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    Just from searching around, it appears that AHT error code is a bad temperature sensor. That would cause the fan to run high like you are seeing.
  3. MagicBoy macrumors 68040


    May 28, 2006
    Manchester, UK
    Most likely a faulty temperature sensor if memory serves.
  4. BigiE thread starter macrumors newbie

    Aug 13, 2014
    Thanks for quick reply.

    I have found that online as well. I'm just confused if the temp sensor is built into logic board?

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