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Just bought this 2010 genesis coupe back in may and it is a great car. Excellent shape. One owner vehicle, super low miles for the year. Owned by an older couple, garage kept. I've had no issues until 2 days ago and the car hasn't started since. All I did was back the car out of the garage and turn it off. About 3 hours later I go out and the car will not turn over. Wont even try to start. I replaced the brake light switch and nothing. I plugged in a code reader and got back the code U-01000 which states ECM/PCM lost connection and that I should replace immediately.im stuck here. I took the battery off and unplugged the ECU and put it back together and still nothing. The override start thing does not work either idk what to do. Help please
 
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