Just yesterday, I changed my ignition coils on my 2013 300S. Once I reconnected everything, I noticed that my brakes locked up during the test drive. After a min or two they released. But then my check engine, fcw, and low voltage light came on. After taking it to O'Riley's, the diagnostic said it was the high air sensor. But it doesn't explain the brakes. Does anyone have any ideas of what maybe going on?