Question 1

What does P0301 mean?

Accepted Answer

P0301 - Cylinder 1 Misfire Detected. Cylinder 1 is misfiring — not producing its share of power.

Question 2

What are the symptoms of P0301?

Accepted Answer

Check engine light, Rough idle, Loss of power, Engine vibration, Poor economy

Question 3

What causes P0301?

Accepted Answer

Bad spark plug, Failed ignition coil, Fuel injector problem, Low compression, Vacuum leak at cylinder 1, Carbon buildup (GDI engines)

Question 4

How much does it cost to fix P0301?

Accepted Answer

Typical repair cost: $20-$800. Swap coil from cylinder 1 to another. If misfire moves, replace coil ($30-80). If stays, swap spark plug next. If still stays, check compression and injector.

P0301 — Cylinder 1 Misfire Detected

Don't guess — diagnose P0301 the right way

Common symptoms of P0301

Common causes of P0301

Repair cost & difficulty

Vehicles commonly affected

Related trouble codes