engine won't remain running shortly after starting.

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Engine shut down while I was on highway with 1/4 tank of gas. Then would not crank. Emergency Response put in 1 gallon of gas & it started. Went and put in Premium gas + octane booster. Was fine for a few weeks. Now starts up, but won't remain running. Cuts off almost immediately. Has 3/4 Premium gas in tank. Check Engine light on. Could this be crank sensor, fuel filter, fuel pump, or something else?