P0301 Cylinder 1 Misfire Detected
What does P0301 mean?
P0301 — Cylinder 1 Misfire Detected. This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects cylinder 1 misfire detected. The level of risk depends on how the vehicle is currently running and how long you've been driving with the light on.
Common causes of P0301
- Faulty spark plug or ignition coil on cylinder 1
- Clogged or leaking fuel injector on cylinder 1
- Vacuum leak near cylinder 1
- Low compression in cylinder 1
- Timing chain or camshaft wear
How to fix P0301
- Confirm the misfire counter with an OBD-II scanner
- Swap the ignition coil and spark plug to another cylinder to see if the misfire follows
- Test the fuel injector on cylinder 1
- Perform a compression test on cylinder 1
- Inspect for intake leaks near that cylinder