P0741 - Torque Converter CKT Performance Or Stuck Off?

I just bought a used 2005 Honda Pilot, about 100 000 miles, and the same day the check engine light came on. I got a code reader and I get the code: P0741 - Torque Converter CKT Performance Or Stuck Off. The car drives fine, so I cannot see anything wrong other than the yellow check engine light. What would that be? What should I do?

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