Apple Hardware Test: 4SNS/1/40000000: 'TCOP'

Hello,

Today the left-hand fan on my MBP has stopped working. Also Windows XP won't start when I run it in Boot Camp - it quits without warning when I try to log on.

Except for the fan issue, my Mac seems to be working fine.

I ran Apple Hardware Test twice and got the following result:
4SNS/1/40000000: 'TCOP'

I can't find any explanation about what this error message means on these forums or Google.

Can someone explain it to me?

Thanks.