Engine fail safe mode! Help please!

[Menace_X5]

I have a 03 x5 4.4 with 110k

I was driving on the freeway and all of a sudden the engine fail safe mode comes on the the engine shuts down. Lucky I could get to the shoulder without getting hit by other cars.

The car starts but once it drops below 1000 rpm the engine dies. If I keep it above 1k rpm it stays on but dies once it drops below 1k.

Have any of you guys encountered this problem? What do you guys think is wrong.

Really tempted to get rid of this car. Don't really feel safe if this happens again since this is my wife's car.

Thanks!