So i have a 2010 Range Rover Sport supercharged, so i wake up the other day and hop in the car everything is fine car is driving fine no issues i go to work literally walk in talk to my boss for all of 3 minutes and realize i forgot the keys to my work truck. So i let the boss know and go jump in the car and it starts right up no slow cranking no hesitation it fires up and off i go well not so fast. I made it about 50 yards and the car just dies all power gone like someone pulled a main fuse to cut all power. i cant even get the thing to roll up a window let alone start again. So i come on here read some forums and try to self-diagnose the problem. So i go get a new battery still nothing go get a new starter nothing pull the alternator and have it checked and its good but i still have no crank no start nothing. So mine has a key fob so when you get in and go start the car and get in push the button once let the gauges cycle and let everything kinda do its thing before starting it. Then once evrything has kinda cycled you push the start button again while your foot is on the brake and once again everything just goes dead. So i put my little OBD2 on it and it gives me error code UO100 Lost communication with ECM/PCM. So i go to taking harnesses off and checking for corrosion or water damage something cuz i need my car its my families only source of trans. Anyway cant find anything wrong with the units so i get my buddies scanner which does all kinds of stuff but i dont mess with anything due to the fact im not familiar with all of it or even some of it and it goes to showing every error code known to man on this car except for 2 areas which are the bluetooth telephone system and personal restraint system those come up fine eveything else codes im not sure how many pages it was but a lot. So now that im stuck like chuck ready to lose my job and the list just trickles down but i need help if any of you can help me get my car going that would be AWESOME. Ive had people tell me anything from its gonna be a bad ground to the immobilizer is bad and i dont know where to begin now that ive exhausted all avenues. oh and one thing i forgot to mention is when your walking up to your car and you grab the door handle how you should hear the fuel pump begin to cycle well i dont even have that anymore. But if that was bad the car would atleast crank and again it does nothing. any and all help in this matter is GREATLY APPRECIATED
thanks for your time and understanding