P0308
Powertrain Codes
P0308 - INFINITI - Number 8 Cylinder Misfire Detected
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation
Possible Causes
- Faulty spark plug 8
- Faulty ignition coil 8
- Ignition coil 8 harness is open or shorted
- Ignition coil 8 poor electrical connection
- Clogged or faulty fuel injector 8
- Injector 8 harness is open or shorted
- Injector 8 poor electrical connection
- Improper spark plug 8
- Insufficient cylinder 8 compression
- Incorrect fuel pressure
- Intake air leak
When Detected
Engine Cylinder 8 is Misfiring.
Description
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.