Error code: 4SNS/1/40000001: TB1T-0.000

Discussion in 'MacBook Pro' started by chewie100, Oct 9, 2011.

  1. chewie100 macrumors newbie

    Joined:
    Dec 25, 2004
    Location:
    Berlin
    #1
    I just did an AHT because for the last month or so, the fans on my Late 2008 15" MacBook Pro have been going full speed, my battery died a while ago, before the fans became so noisy, and I think this error message has something to do with it.
    In Energy Saver Preferences, it is set to Higher Performance, I have tried the Better Battery Life setting and the fans go quiet for a while, but then are back to the same RPM as soon as any apps that are CPU hungry start up.
    There is not really anything unusual showing in Activity Monitor in terms of CPU usage, apart from the kernel_task which consistently uses around 66 threads, (not sure if that's relevant or not.)
    From what I have read on other discussions about this error code, it seems that a heat sensor is failing because of the dead battery, and is therefore causing the excessive heat and noisy fans, and therefore the sluggish performance of the machine.

    I have been putting off buying a new battery for some time, but I may just have to bite the bullet. My question is, is a new battery likely to fix the issue of the high fan RPM/heat/sluggish performance?
     
  2. MarkMS macrumors 6502a

    Joined:
    Aug 30, 2006
    #2
    Highly doubt it. Sounds like a sensor issue in the MacBook Pro. The only issue I know of that deals with sluggish performance and the battery is if you were to remove the battery and operate the MacBook Pro directly on the AC adapter.
    Source: http://support.apple.com/kb/HT2332

    Try taking it to Apple or an authorized Apple Repair Center.
     
  3. chewie100 thread starter macrumors newbie

    Joined:
    Dec 25, 2004
    Location:
    Berlin
    #3
    Well, I took the battery out about 10 minutes ago, I have all the apps open that i'd had open before when the fans were blowing full speed; Safari, iTunes, Transmission etc, and... nothing, the fans are at a whisper quiet 3500rpm, and there is no sluggishness.
    I will however take the MB to a sys admin tomorrow.
     

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