Stalling on the freeway

Hello,

Today on the freeway my wife's 2006 (early model) Kia Optima had a vibration, fluctuating RPM and then it stalled. When it stalled we saw all lights on the instrument panel light up. No check engine light stayed after staring it again. We drove for a few minutes and it died again.

I opened the hood on the safety lane and checked the battery poles and belts.I could not see anything out of the ordinary. But my wife said a day before a bird flew in front of the car's grille and she found the bird's skeleton at the driveway that evening.

We drove the car home without problem. 15 minutes or so. No check engine light.

I cleaned the throttle plate thinking it might help. But it did not.I can not start the car, when it starts it stalls after a few minutes. And after cleaning the throttle plate now Check Engine light is on.

A couple of months ago timing belt has been replaced at the dealership.
More than a year ago we experienced RPM fluctuation and a check engine light was set. Dealership replaced oxygen sensor. Typing these thinking if it might have anything to do with the current problem. The car has 75,000 miles on the odometer.


What could be the problem?