Very Loud Fan -- How to make it stop?

I have a new MacBook Pro that I purchased in November, replaced in December. Recently, the fan has been running really loudly all the time.
In one of the other posts, someone spoke about smsFanControl, that I downloaded. The fan monitor tells me that the fan is running at about 6000rpm.
I've rebooted my computer, I performed an SMC reset, I ran the hardware test from the OSX install disk (came back with Error: 4 SNS/1/40000000: TGOH), ran the disk utility. I also installed the firmware update prior to these problems starting. Occasionally the fan slows down. More often than not though, it's been running excessively high. The temp gauge seems to be working fine too (when the fan's high/6000rpm: 35 deg C, when the fan's running normally/2000rpm: approx. 50 deg C). I'm also not running any processor intensive software (I used to render 3D environments on my old laptop, but not on this one).
I would send it in to Apple, unfortunately I'm studying in France this year, and Apple France doesn't allow you to send your computer in. You have to bring it to repair center (closest one is an hour drive away, and I don't have a car).
Does anybody have any solutions? I checked the other postings and there don't seem to be any solutions that I can benefit from.
Thank you!
Macbook Pro 2.33 Mac OS X (10.4.8)

> If this is an intermittent problem, does that mean that the sensor's loose?
It could be, when it gets no reading from the Sensor it goes into "run 100% just in case" mode, the other possibility is a software process hogging the CPU (but that wouldn't show as a hardware fault)

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I've read that if I installed OSX 10.4 then the fan would run quieter.
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Very Loud Fan -- How to make it stop?

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