p0300
Moderate
Porsche · Sedans & Sports Cars
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your Porsche Sedans & Sports Cars means: Random/Multiple Cylinder Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Read freeze frame data to determine misfire conditions
2
Inspect and replace spark plugs if worn or fouled
3
Swap ignition coils between cylinders to isolate a faulty coil
4
Perform a compression test on all cylinders
5
Check fuel pressure and inspect injectors
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Spark plugs
Ignition coils
Fuel injectors
Valve cover gasket
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