Upon starting car, check brake system warning came on. Attempted to take it to dealer but, when approaching stop sign, brake pedal went to the floor and could barely stop. I made it back home and also noted that the vehicle could no longer hold itself up even on a small incline. This happened for no apparent reason and brakes had been working as normal with no indication of wear. Had tow truck take it local Ford dealer and the driver said he tested the brakes and they were working. Once at the dealer, the service manager said he drove it around parking lot and all seemed fine. I told him how the wrench warning light (power train) had come on approximately 3 times in a month, but never stayed on after vehicle shut off and restart. He said that all these warnings should be stored in the computer but when checked, the system was totally clear of any errors or warnings. The Ford dealer is not sure what to do with it now, after having it for over 4 days, and they are concerned because everything to appears to working normally and no issues with the brakes themselves. I feel it is unsafe to have a car where the brakes can spontaneously stop working, for no apparent reason, which seems to lead to a software malfunction.

- Speedwell, TN, USA