What does fault code po304 mean and how do I fix it?

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25 Jun, 2012

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  • 89min
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P0304 INFINITI - Number 4 Cylinder Misfire Detected

Possible causes- Faulty spark plug 4
- Faulty ignition coil 4
- Ignition coil 4 harness is open or shorted
- Ignition coil 4 poor electrical connection
- Clogged or faulty fuel injector 4
- Injector 4 harness is open or shorted
- Injector 4 poor electrical connection
- Improper spark plug 4
- Insufficient cylinder 4 compression
- Incorrect fuel pressure
- Intake air leak
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