Empowering You to Master the P0300 Code A Path to Engine Excellence

A P0300 trouble code means that one or more cylinders is misfiring and not completely burning its fuel/air mixture. Bearing in mind that you ... 0300 is misfire. You changed the plugs. Bad plug, damaged plug wire (yanked off by wire and not boot), cracked plug, not connected at coil. A P0300 can be caused by SEVERAL different things, ranging from bad gas, bad plugs, bad coil packs, bad/dirty MAF sensor, bad MAP sensor, lots ... It that has been throwing a p0300 random misfire code as well as the code for the o2 sensor after driver side cat. Truck idles yet any speed ... This diagnostic trouble code (DTC) indicates that your car's computer has detected an engine misfire that's random and/or appearing on multiple cylinders. How to fix P0300 Code: Random or Multiple Cylinder Misfire Detected A P0300 code is set when one or more cylinders are not firing correctly. Sounds like possible intake belly pan gasket causing internal vacuum leak which will cause random misfires, fuel in oil, hard start, rough idle, low power, etc. This P0300 code means that the the car's computer has detected that not all of the engine's cylinders are firing properly. A P0300 engine code indicates a random or multiple-cylinder misfire has been detected by your car's On-Board Diagnostic II (OBD-II) system. The engine light has come on, but goes off after a few starts or running time. It comes on when truck is idling or street driving---niot while on the highway ...