I finally got a buyer for my car. Went to drive her/warm her up today..battery ****...did a jump start worked then later in the day dead again. Got a new battery starts strong now. But had CE light that read "low voltage" code 256? Autozone clear it has not came back. But now the radio is not turning and im not getting any temp.ac reading up top. All the buttons work besides the radio. Checked the Audio fuse all is well. The car is stock besides a aux jack for the ipod. PLEASE need help ASAP guy is coming for the car Saturday.

 

try disconnect the battery and reconnect it again.
probably just needs a reset.

 

Did you check both fuses there is one under the hood and another by ur left foot on the driver side under the steering.