2000 Buick Century Code P0741

2000 Buick Century, 100,000 miles, 3.1 liter engine. Took the car to Advanced Auto Parts to get the codes read because the service engine lite is on. It hit for Torque Converter CKT Performance or Stuck Off, code P0741. On their suggestion I changed the automatic transmission fluid and filter. I had the battery disconnect while changing the fluid and filter. The service engine lite is still on, and their code reader still reads the same. Any help would be appreciated.

Thanks