P0305 Cylinder 5 Misfire Detected
What does P0305 mean?
P0305 — Cylinder 5 Misfire Detected. This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects cylinder 5 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 P0305
- Faulty spark plug or ignition coil on cylinder 5
- Clogged or leaking injector on cylinder 5
- Vacuum leak at cylinder 5 intake runner
- Low compression in cylinder 5
- Timing or valvetrain wear
How to fix P0305
- Verify misfire counts with an OBD-II scanner
- Swap the coil and plug to see if the misfire follows
- Test the cylinder 5 fuel injector
- Compression test cylinder 5
- Check the intake gasket for leaks at that runner