P0307 Cylinder 7 Misfire Detected
What does P0307 mean?
P0307 — Cylinder 7 Misfire Detected. This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects cylinder 7 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 P0307
- Faulty spark plug or ignition coil on cylinder 7
- Clogged or leaking injector on cylinder 7
- Vacuum leak at the cylinder 7 intake runner
- Low compression in cylinder 7
- Engine mechanical damage
How to fix P0307
- Confirm cylinder 7 misfire counts with an OBD-II scanner
- Swap the ignition coil and spark plug to check if the fault follows
- Test the fuel injector on cylinder 7
- Compression test cylinder 7
- Inspect the intake for leaks at that runner