p0301
Moderate
Porsche · Sedans & Sports Cars
Cylinder 1 Misfire Detected
Quick Answer
Error code P0301 on your Porsche Sedans & Sports Cars means: Cylinder 1 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 for operating conditions during misfire
2
Inspect and replace spark plug in cylinder 1
3
Swap ignition coil with another cylinder to isolate the problem
4
Check fuel injector spray pattern and operation
5
Perform a compression test on cylinder 1
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 coil pack
Fuel injector
Valve cover gasket
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