If you have code P0301, 2, 3, etc. misfire codes read my advice and diagnostic info below.

Code p0301 and related misfire codes (p0302, p0303, etc.) basically mean that there is a misfire on that respective cylinder in the firing order. For example, p0306 means "misfire cylinder 6", p0302 means "misfire cylinder 2" and so on.

The most common causes of this type of problem are:

Spark Plugs and Wires
Fuel Injectors
Internal Engine Problems such as Low Compression, etc.

Other things that might cause this code are:

Faulty Computer
Coil or Coil Packs
Crank or Cam sensors or reluctor wheels
Faulty O2 (Oxygen) Sensors

The first thing to do if you have this code is to inspect EVERYTHING that has to do with that specific cylinder. Since the misfire code is for that cylinder only it has to be only something that would affect that cylinder. This is the key to diagnosing this engine problem.



Leave p0301 and go to obd codes