Cylinder 2 Misfire Detected
What it means
Cylinder 2 is not producing normal power because its air-fuel charge is not burning completely. Most cases come down to the coil, spark plug or injector serving that cylinder.
Symptoms
- Vibration felt through the steering wheel and seats at idle.
- Stumbling when accelerating.
- Check engine light on, possibly flashing.
- Increased fuel consumption.
Possible causes
- Failed ignition coil on cylinder 2.
- Old or heavily carboned spark plug in cylinder 2.
- Clogged or leaking injector on cylinder 2.
- Damaged wiring or connector at the coil or injector.
- Oil in the spark plug well from a leaking valve cover gasket.
- Low compression in the cylinder (less common).
How to diagnose and fix
- Swap the cylinder 2 coil with a neighbor, clear the code and test drive.
- Inspect the spark plug and check the plug well for oil.
- Replace the valve cover gasket if oil is found around the plug.
- Check the injector and its connector; clean or replace as needed.
- Run a compression test if the steps above do not solve it.
Repair cost
Most repairs end with a coil or plug at low cost, rising if an injector or internal engine repair is needed.
Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Frequently asked questions
I found oil on the spark plug. Is that the cause?
Very likely. Oil weakens the spark and damages the coil over time. Replace the valve cover gasket, clean the well and fit a new plug.
Will the code go away on its own?
It may clear temporarily if the misfire is intermittent, but the underlying fault remains and the code usually returns.
This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.
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