pt cruiser 2002

I have a 2002 PT Cruiser. Last week, my two year old battery died while sitting out in my work's parking lot. I didn't leave any lights on or anything. I tried jump starting, but it wouldn't budge. I ended up buying a brand new battery and it worked for a total of 3.5 days. My car is now dead...

My elderly mother of 82 yrs has a 2002 pt cruiser which has been stalling intermittently and now is missing intermittently as well, showing codes p0202 and p1684. This car had been running fine until a few months ago when it was over heating. She took it to her trusted mechanic of 10 yrs and he...