A few days ago got in my Car and it had The Brake light on the dash. Also a few other warning messages, Service Brake Assist, Check Brake Fluid Level, and Service Stability system. The issue showed up over night, the only effect I have seen on driving is a lag in throttle Response on the low end. I checked the brake fluid and topped it off but it was not missing much and all warning lights and messages are still present. I stopped driving the car because i dont want to do any damage before i figure out what is going on. Any ideas what might cause these messages to trigger in an 05 4.6L V8 STS4?