I too have been having this problem. I get the same warnings in the instrument panel. It started two months ago. I took it back to the dealer 3 times and they only replaced the smart jumper box on the instrument cluster and the problem keeps coming back. It sounds like there's a short somewhere...
Here's my problem... I have an '06 Mustang v6... About a month ago I started to experience some problems when I started the car. First there came a beep followed by the following warning messages in the instrument panel:
FUEL LEVEL LOW DTE FLI DATA ERR
OIL PRESSURE LOW
BRAKE FLUID...
