this time it came back on when i plugged in my cell phone
charger into the right side accessory outlet. the light
came on and wont go off. need help.

Just a suggestion, but take it back to the dealer and if a "low-voltage" code is again detected, have the dealer check for a loose connection that has your airbag and accessory socket on the same circuit. Sounds as if a common voltage supply wire may be the problem if it is not making a good connection somewhere.
A cell phone charger only draws a couple of amps of current and shouldn't pull down the voltage that much.
The key is that apparently both (airbag and accessory jacks) are on the same circuit. Go from there. Good luck.

thanks. i will check it out, i bought this
truck from a bank, it was a repo. so
no warranty, i did install a foglight switch
around the accessory pugs....i may have
accidently unplugged something.