OBD-II code · Powertrain (generic)
P0314 Single Cylinder Misfire — Cylinder Not Specified
A persistent misfire is detected on one cylinder, but the engine controller cannot identify which cylinder is affected. Often seen on engines without per-cylinder feedback or when crank position correlation fails.
Is it safe to drive with P0314?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWeak ignition component on one cylinder
- PossibleInjector partially clogged
- Less likelyLow compression on one cylinder
Symptoms
- Check engine light on or flashing
- Rough idle and uneven running
- Power loss, hesitation under acceleration
- Increased fuel consumption
- Possible smell of unburned fuel from exhaust
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–4 h
- Emissions test
- Likely to fail
- Parts involved
- Ignition Coil, Injector, Spark Plug, Ecm
Related codes
- P0300Random/Multiple Cylinder Misfire Detected
- P0313Misfire Detected with Low Fuel
- P0311Cylinder 11 Misfire Detected
- P0312Cylinder 12 Misfire Detected
- P0315Crankshaft Position System Variation Not Learned
- P0316Engine Misfire Detected on Startup (First 1000 Revolutions)
- P0317Rough Road Hardware Not Present
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.