p0300
Moderate
Cadillac · Sedans
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your Cadillac Sedans 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
Replace all spark plugs with OEM specifications
2
Inspect and test ignition coils
3
Check fuel injector operation and cleanliness
4
Perform compression test on cylinders
5
Verify engine timing and camshaft position
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 injector cleaner
Compression tester
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