Failed AHT: 4SNS/1/4000000:TB1T-128.000. What does it mean?

Ran AHT on my MBP to see if there were any hardware issues (the machine seems to be sluggish lately, and frequently has issues when waking from sleep). My plan was to take it in for a checkup before applecare ran out, but unfortunately, my coverage ran out yesterday (the 17th) instead of tomorrow (I was under the impression it expired on the 19th).
Anyways, I ran the apple hardware test, both regular and extended, and they both stopped on the logic board scan returning the error: 4SNS/1/4000000:TB1T-128.000.
First off - can anyone explain what this error means to me? I found an article on CNET that demystifies this somewhat (http://reviews.cnet.com/8301-13727_7-57352461-263/how-to-invoke-and-interpret-th e-apple-hardware-tests/), and from it, I was able to glean that there's something wrong with the temperature sensor on the battery. That said, I can still pull up the temperature on the battery using iStat Menus 3 and it seems to be within norms. This leads me to believe that there's a problem with the logic board. I say this because the logic board has been replaced before during the warranty period, and it would seem that it's a problem component on this model line. (Refurb MBP 15" late 2008 - FB471LL/A)
If this is indeed a logic board issue, what are the chances I can get apple to spring for this repair free of charge considering the circumstances (only one day outside of Apple Care coverage, has been an issue previously)?
Any help the community can offer would be greatly appreciated. Thanks!

For reasons unknown to me the AHT codes are not available to the likes of you and I.  Take the MBP in to the genius bar with the code information, and they will know what it means.
As for any replacements of the logic board, all I can say is that I wish you the best.  No one this forum has any say in such matters.
Ciao.

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