Battery replacement and car won't keep an idle on 2003 Toyota Camry

I tried to replace the car battery and now the car won't keep an idle. All fluids, gages, lights, fuses are fine. The car starts but then dies. Is it a computer problem?

Asked by for the 2003 Toyota Camry
possibly...or possible blown fuse somewhere...
I took it to my mechanic to look at it
Wise choice!