Got an error code after running AHT. Now what?

I ran the Apple Hardware Test and got the error code: 4sns/1/40000000:th1H-83.265

I looked it up and it apparently means there's a problem wuth my heat pipe or heat sink. Makes sense because my MBP burns up and fans really start going when running a game, movie, or photoshop. Does this mean I have to replace something or what? How much will it cost me if I take it in for repairs? I no longer have warranty. I had to replace my harddrive after it failed in Feb 2012 so I will not be happy if it turns out the failure was related to this heat problem and never fixed.

Mid-2009 13" MBP running OSX 10.8