Random / Multiple Cylinder Misfire Detected
Powertrain · Ignition & Fuel System
Multiple cylinders are misfiring randomly, causing rough idle, poor acceleration, and potential catalytic converter damage. The random misfire pattern points to a shared cause like spark plugs, fuel delivery, or engine compression.
- Worn or fouled spark plugsMost common
- Failing ignition coilsMost common
- Clogged or failing fuel injectorsCommon
- Low compression (worn rings or valves)Less common
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Frequently asked questions
What does P0300 mean?
Multiple cylinders are misfiring randomly, causing rough idle, poor acceleration, and potential catalytic converter damage. The random misfire pattern points to a shared cause like spark plugs, fuel delivery, or engine compression.
Is P0300 serious?
Stop driving if misfires are constant — catalytic converter damage risk.
How much does it cost to fix P0300?
Repair costs for P0300 range from $80 – $250 depending on the root cause and your vehicle.
Can I drive with P0300?
No — this code indicates a serious issue. Stop driving and have the vehicle inspected immediately.