The engine is misfiring on cylinder 4.
Have this diagnosed before driving further
Informational only. Consult a qualified mechanic.
Replace spark plug and ignition coil on cylinder 4.
The P0304 OBD-II diagnostic trouble code (DTC) indicates: cylinder 4 misfire detected. This is a high-severity powertrain code that your vehicle's onboard diagnostics system triggers when the engine is misfiring on cylinder 4. If your check engine light is on with this code, you should have the vehicle inspected immediately before driving further.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
Track codes on your vehicle — sign up free
Log OBD-II codes, get maintenance reminders, and keep your complete service history.