Yesterday while driving, my Driver side headlight was out. This AM, unlocked the car with keyfob and checked; all lights were on. Then started the car up and checked again, now the driver side headlight was out. Played with light switch on turn signal but no change. Is this a light buyld problem or a switch problem?

 

when you unlock or lock your car with the fob, the lights you see are actually your Highbeams..your driving lights are the lowbeams...so it might be time to replace the bulbs...check by engaging the highbeams and see if the driver side light works

 

It's likely the bulb - change it and if it fixes it - great. If it doesn't go from there.

At least pull the bulb and eyeball it for a broken intermittent filament.