p0314 single cylinder misfire cylinder not specified
- OBD2 Code: P0314
- Description: Single Cylinder Misfire – Cylinder Not Specified
- Definition: This code indicates that the engine control module (ECM) has detected a misfire in one of the engine’s cylinders, but it cannot determine which specific cylinder is affected.
p0314 – Single Cylinder Misfire (Cylinder not Specified)
Typical Severity: Moderate
Common Causes
P0314 – Single Cylinder Misfire (Cylinder Not Specified)
Common Causes:
- Faulty spark plug
- Faulty ignition coil
- Vacuum leak
- Clogged fuel injector
- Low compression in the cylinder
Common Misdiagnosis
OBD2 Code: P0314
Description: Single Cylinder Misfire (Cylinder Not Specified)
Common Misdiagnosis: Faulty spark plugs or ignition coils are often misdiagnosed as the cause, while the actual issue may be related to fuel delivery problems or vacuum leaks.
Common Diagnostic Steps
OBD2 Code: P0314
Description: Single Cylinder Misfire – Cylinder Not Specified
- Check for any other related trouble codes that might indicate a specific cylinder or additional issues.
- Inspect the ignition system, including spark plugs, ignition coils, and wiring for damage or wear.
- Examine fuel injectors for proper operation and check for clogs or leaks.
- Perform a compression test to ensure engine cylinders are within specification.
- Look for vacuum leaks in the intake manifold and associated hoses.
- Verify the condition of the crankshaft position sensor and its connections.
- Check the exhaust system for restrictions or damage that could affect engine performance.