[Its_Plo]

So this all started about 2 weeks ago, I was driving home from work and the battery icon came on my display. Did this for about 3 days before I took it in to check the battery. The guy at O-reilleys auto ran a check on my battery and said it wasn't getting enough voltage, he then checked the alternator and it failed the test. Apparently not getting enough voltage to the battery.

A few days pass and I'm getting off of work to go to a friends house. After I leave his house i get in my car and try to start my car, no crank. The lights on the dash come on but when I press the start button my car doesn't do a thing. So I'm thinking my alternator has finally failed me. Before I dish out the cash for the alternator I had my friend come over today and scan my car with his fancy OBD scanner. I through a A0B4 fault code along with a few others (nothing serious). After clearing the codes and re-scanning my car the A0B4 error returned. Battery was getting 11.3 volts btw, this is low from what I've read

Been doing some reading and a lot of people are saying its a bad starter. BUT I just was told my alternator failed the test. Seems that this error code is all over the place and can be caused by many things, just need some second opinions before I pull the trigger on a new alternator, THANKS!!!