Battery Charging Issue?

OK. Sorry for the delay. I got in my car this morning and started it up. Hybrid battery was in good shape. But I ran it for a minute in the car port and all the lights came on. I do not know what the codes are yet. I wanted to get an opinion before I took it up to a shop for codes. I was watching the hybrid battery while I had it on for approximately two minutes. The hybrid went down to 0 from a decent charge then that is when the check engine lights came on. I turned it off and also checked the 12V out of curiosity. It was still 12V which is as good as I can get out of it right now. But since it is pretty much dead, could that be what was going on? Was the hybrid trying to charge the 12V? I know there is not much to do without the codes, but I wanted to ask if you guys thought it was OK to at least drive it 2 miles to my store to get the codes?

One more thing, while I had the car on, there was a squeaking/chirping sound coming from the engine. The first thing I thought of was a pump running dry. Any ideas? On and off chirp and only a brief second at a time.

 

No, I have never seen it go completely blank. It had one bar. But it happened within a minute or two after starting the car

 

Yes. But I do know I had a dead 12V to start with. It osculated from dead to mostly charged to dead to fully charged in the 10-15 minutes until I parked it fully charged. It was mostly charged this morning and went dead almost right away before it gave me the code. I was hoping to find out if it would be unwise to drive it 2 miles or so to my shop to get the code? I just got one of those wifi OBI thingys. If I get it figured out, I will try to get the codes myself.