It starts up and idles in Park just fine. It is not driveable. When the car is shifted into either Reverse or Drive, it dies. I had it towed to my girls house so her mechanic can look at it, but the tow truck driver thinks it might be the throttle body sensor being gunked up or dirty. Yes, it happened suddenly. When it happened, I was stopped at a red light. Then the car lurched forward slightly and the engine shut off. All the electrical components and A/C still work as well.