2004 Jaguar XJ8 Engine system fault, Dsc not available, Par

Crusing home on the highway going about 50MPH, not accelerating nor coasting, just maintaining speed. The engine basically shut down, and I had to pull onto the shoulder, it was very dangerous and frankly, it freaked me out. While on the side of the road I realized that it was idling at about 1100 rpm's, barely moved even thought the accelerator was depressed to the floor, engine light on, as well as "engine systems fault, parkbrake fault, dsc not available" showing up on the dash. I restarted the car about 4-5 times and it eventually got out of "safe mode", I am assuming, but the check engine light remained on. It returned to regular idle and actually drove. Regardless I got it towed to my house because I didnt want to chance it. When it arrived, I got back in the car, started it up and not only did it start up and drive normal, but there was NO check engine light whatsoever. I am very perplexed that a car would just shut down on the highway, put itself into "Limp Mode" and be absolutely fine a half hour later.


What is the problem and how do I fix it? SWhere is the problem located in the engin? Ect. Is there a repair manual I can get?

Thanks,

RedJag04