I was driving down the highway and my vehicle completely shut down and the steering locked. i was able to put on the emergency signals and the big rigs behind me blew their horns. they were getting closer to me because i was decelerating at a rate that would have resulted in a colission. fortunately i was able to coast into an emergency lane while they went whipping past me. the volvo service manager stated that he had heard of a similar situation before. in an email to me he stated that "the pressure sensor was giving a faults reading, of excessive fuel pressure. when the pem saw the faults reading, it cut the fuel to the engine as it thought it was way over pressurized." i feel very fortunate that nobody was severally injured or killed.