Single Cylinder Misfire (Cylinder not Specified)
P0314 is an OBD-II trouble code that indicates single cylinder misfire (cylinder not specified). This page explains what the code means, what issues may trigger it, common symptoms and where to look next.
P0314 code meaning is one of the most common OBD-II searches when a warning light appears on the dashboard.
Drivers searching for P0314 usually want to know what the code means, whether the car is safe to drive and what part may need testing first.
Likely causes
- • Worn spark plugs or ignition parts
- • Injector or fueling imbalance
- • Compression-related engine issue
- • Wiring or connector issue
- • Component failure in the affected system
- • Intermittent signal or control fault
Symptoms
- • Check engine light illuminated
- • Engine shaking or rough idle
- • Loss of power under acceleration
Severity
High
Can you keep driving?
It is usually best not to keep driving for long with a misfire, because it can damage the catalytic converter and worsen engine running.
Common fix areas
- • Inspect spark plugs and ignition coils
- • Check injector performance and fuel delivery
- • Test compression if misfire persists
- • Scan all fault codes and freeze-frame data
- • Inspect wiring, connectors and grounds
- • Confirm repair with a retest after clearing codes
Manufacturer notes
FAQs
What does P0314 mean?
P0314 means single cylinder misfire (cylinder not specified).
What can cause P0314?
Common causes include component failure, wiring faults, incorrect sensor readings, leaks, pressure issues or related upstream faults in the same system.
Can I keep driving with P0314?
That depends on how the car is behaving. If there is rough running, overheating, loss of power or stalling, it should be diagnosed quickly.
Does P0314 always mean I need a new part?
No. A fault code points you to a system or condition, but proper diagnosis is still needed before replacing parts.