P0304Severity: High
P0304 – Cylinder 4 Misfire
A misfire was detected in cylinder number 4.
What it means
The ECU detects a loss of combustion in cylinder 4. That cylinder's plug/coil/injector and compression should be checked.
Symptoms
- Vibration
- Loss of power
- Check-engine light
- Rough idle
Common causes
- Faulty spark plug (cyl 4)
- Faulty ignition coil
- Clogged/faulty injector
- Compression loss
- Vacuum leak
With AutoMulti
AutoMulti reads this trouble code from your car in seconds, explains it in plain language with AI, lists the likely causes and helps you clear it when appropriate.
on theApp StoreSoonGet it onGoogle PlaySoon
Frequently asked questions
What does trouble code P0304 mean?
P0304 – Cylinder 4 Misfire. The ECU detects a loss of combustion in cylinder 4. That cylinder's plug/coil/injector and compression should be checked.
Can I drive with a P0304 code?
This code is high severity. Driving for long can damage the engine; have it checked as soon as possible.