Engine and gearbox (P)
P0300: Random or Multiple Cylinder Misfire
This code indicates that the engine is experiencing misfires in multiple cylinders. It often relates to issues with the fuel system, ignition components, or engine compression.
Checked by a licensed car technician · last reviewed 29 September 2026
Symptoms
- Rough idling
- Poor acceleration
- Check engine light on
- Increased fuel consumption
Common causes
- Worn spark plugs
- Failing ignition coils
- Fuel pressure drop
- Vacuum leaks
- Faulty fuel injectors
How to check it yourself
- Inspect spark plugs and ignition coils
- Check fuel pressure
- Inspect for vacuum leaks
- Test fuel injectors
Can I keep driving?
The car can still be driven, but prolonged driving may cause damage to the catalytic converter.
General guidance, not a professional inspection. Confirm faults with measurements before buying parts, and use a qualified mechanic for brakes, steering, fuel leaks, airbags, and other safety-critical work. Terms and disclaimer