P0301 – Cylinder 1 Misfire Detected
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Symptoms
- Rough idle
- Hesitation
- Poor acceleration
- Engine shaking
- Check engine light
Causes
- Worn spark plug
- Faulty ignition coil
- Vacuum leak near cylinder 1
- Fuel injector issue
- Low compression
Diagnosis
- Check misfire counters
- Inspect spark plug
- Test ignition coil
- Check injector pulse
- Perform compression test
Repair
- Replace spark plug
- Replace faulty coil
- Fix vacuum leaks
- Clean or replace injector
- Repair compression issue