P0300 - Cylinder Misfire Detected Random Cylinders.
When your engine starts running rough and the check engine light comes on, you can almost bet that you are going to see an Engine Misfire Code.
P0300 Description
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.
Engine Misfire Symptoms
Engine Misfire Causes
You can narrow down which cylinder the misfire is on if you pull a specific code. Ex. P0301 is cylinder #1, P0302 is cylinder #2, P0303 is Cylinder #3 and so on.
