if the light doesnt come on when you start the car can u replace the bulb or is it something else

Don't understand question ... do you mean that you have a CEL (check engine light) and now you don't .. most newer cars have solid state (LED) lights and they must be changed by a technician but it's unusual for them to burn out

what light/s??? what year...help???

I was driving down the road Tuesday and it started missing changed plugs wires coil pack and injectors and it is still missing check engine light does not come on at all