2001 Honda Civic Transmission Problem

I have a 2001 Honda Civic EX, A/T, 156K miles. I was driving recently and the transmission was pulling, then the check engine light came on. When I got to my destination ~3 miles down the road, & tried to back into a parking spot, the car would barely move. It goes into gear but only moves sometimes. The OBDII pulled code P0740 – Torque Converter Clutch Circuit Malfunction. What does that mean?