SO i purchased a 2006 Prius the other day,138456 miles. It needed a wheel Bearing, and new muffler, so fixed both of those issues. I drove it home from the shop and when I turned on the Heat and about 3 mins later the red triangle of death shows up. I was close to my home so i make it home shut it off and it wont start back up. i unplugged the plug on the 12 volt Battery and reset the computer and drove it 35 miles today. no issues, but as soon as i turn the heater on the red triangle of death shows up. The display shows its charging in the green, minus 1 bar, does anyone think i have a battery issue?