p0300
Moderate
Fiat · Cars
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your Fiat Cars 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
Scan for specific cylinder misfires using OBD-II
2
Inspect spark plugs and replace if worn
3
Test ignition coils individually
4
Check fuel pressure and injector spray pattern
5
Clean fuel injectors or replace if necessary
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
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