Could be a bad ignition coil (if coil on plug equipped).
Could be a bad spark plug or wire
Trouble code P0300 means:Random/multiple cylinder misfire detected
there isn't one, it's a caculated mesurement, if you have this code then you most likely have a misfire, small misfire usally
Trouble code P0304 means:Cylinder 4 misfire detected
Trouble code P0301 means:Cylinder 1 misfire detected
Trouble code P0300 means:Random/multiple cylinder misfire detected
Trouble code P0301 means:Cylinder 1 misfire detected
Trouble code P0300 means:Random/multiple cylinders misfire detected
the code p0304 is cylinder 4 misfire detected
try checking your 02 sensors
Cylinder #6 misfire see related question below
Trouble code P0300 means:Random/multiple cylinder misfire detected
po300-Random/multiple cylinder misfire detected. po303-Cylinder no. 3 misfire detected. po306-cylinder no. 6 misfire detected po300-Random/multiple cylinder misfire detected. po303-Cylinder no. 3 misfire detected. po306-cylinder no. 6 misfire detected