Glad you were able to do your trip without a major problem. There are a lot of different causes for this error message. You can see some of the threads at the bottom of the page. Just click on the links to explore. The failure of the car to sense having gas available is fascinating -- wordptom has an amazing memory and gift to fitting things together. It may be right but, while it doesn't seem likely, the braking and the error message might also just be a coincidence.