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DTC - Diagnostic Trouble Codes information

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.