Why my Honda fit stalled and failed to start

My Honda fit hybrid 2012 stalled on the highway suddenly, tried to start but would try to crank but sounded how a car would sound without fuel, I checked all dashboard lights and found that all were working except oil and battery. We did diagnosis but couldn't get any code,we have checked fuses and sensors and all are ok,the gear lever is stuck at parking, the plugs are not giving any Sparks. Have been advised bo change the computer.i need advice before changing the computer.