i did aht because last month or so, fans on late 2008 15" macbook pro have been going full speed, battery died while ago, before fans became noisy, , think error message has it.
in energy saver preferences, set higher performance, have tried better battery life setting , fans go quiet while, same rpm apps cpu hungry start up.
there not unusual showing in activity monitor in terms of cpu usage, apart kernel_task consistently uses around 66 threads, (not sure if that's relevant or not.)
have read on other discussions error code, seems heat sensor failing because of dead battery, , therefore causing excessive heat , noisy fans, , therefore sluggish performance of machine.
have been putting off buying new battery time, may have bite bullet. question is, new battery fix issue of high fan rpm/heat/sluggish performance?
highly doubt it. sounds sensor issue in macbook pro. issue know of deals sluggish performance , battery if remove battery , operate macbook pro directly on ac adapter.
source: http://support.apple.com/kb/ht2332
try taking apple or authorized apple repair center.
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