Code P0741

I was driving on the interstate car suddenly quit running no signs except I was slowing down put it in neutral tried to start while coasting no go pulled to shoulder. Tried again acted like a weak battery. Got a jump same deal dash lights go dim and hear a sound like starter tried but doesn't turn motor at all. Towed it to auto zone checked codes only one was p0741. Battery is only 6 months or so old. I put the battery in my Dodge 1500 which has been sitting for a few months and it cranked it no problem, so I don't suspect the battery. I read up on the code but can't see how it could cause this problem. Checked oil it was a little low added a quart level good. I can't check transmission fluid since it won't run. Also, the temperature gauge was normal when this happened. Any thoughts?