So i went to go start the mustang this morning after a little over a week of not driving it and the starting gods were not with me on this one. I could hear the start click pretty fast like it was trying to do its job but no dice. 3 codes are thrown. The first is P060A, then P2107, and last U0300. I'm thinking the first code is where i need to put my focus. Also when i try and start the car the lights and gauges flicker pretty fast. When i try and lock the car with remote the horn sounds like its struggling to honk. My guess is the battery. I have yet to stick a battery tender (for longer than 5 minutes) on the car and see . I did try and start the car with the tender on it after a few minutes this am in attempt to get the car started so i could get to work but no dice. I realize i should just let it charge for an hour or two for that's my mistake. Any ideas what might be the culprit? Thanks for your advice.