P0300 – Random/Multiple Cylinder Misfire Detected
Want to confirm the real cause of this fault code?
A high‑quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze‑frame information — exactly what you need to verify the root cause of this code with confidence.
Symptoms
- Rough idle
- Hesitation
- Poor acceleration
- Engine shaking
- Check engine light
Causes
- Worn spark plugs
- Faulty ignition coils
- Vacuum leaks
- Fuel injector issues
- Low fuel pressure
Diagnosis
- Check misfire counters
- Inspect spark plugs
- Test ignition coils
- Check fuel trims
- Perform smoke test
Repair
- Replace spark plugs
- Replace faulty coils
- Fix vacuum leaks
- Clean or replace injectors
- Check fuel pressure