p0300
Moderate
Subaru · SUVs & Crossovers
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your Subaru SUVs & Crossovers means: Random/Multiple Cylinder Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Connect OBD-II scanner and retrieve misfire data
2
Perform compression test on all cylinders
3
Check and replace spark plugs if needed
4
Test ignition coils with multimeter
5
Verify fuel pressure and check for vacuum leaks
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
OBD-II scanner
Spark plugs
Ignition coils
Compression tester
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