my 2 cents.. don't let a rebuilt title affect your decision unless you are worried about resale value. I've had a couple vehicles with rebuilt titles with 0 issues. Honestly even got what I paid for 1 and profit off the other.
I have been having this problem since i got my car in december. no code tho, cel comes on for a sec after my car practically dies and then its like nothing ever happened. yesterday i found some wires that were going from my fuse box to my battery were rubbing on the metal bracket for my fuse...