p00300 code ( check engine light ) on 2005 Chevrolet Cobalt SS

my car is reading p00300 code not sure it says misfire on cylinder. does anyone know i dont want to change all four coils if not the problem

1 answer
Many possibilities here, and if it doesn't point to one cylinder, here is some info: http://repairpal.com/OBD-II-Code-P0300