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P0304OBD-II Code

Understanding Code P0304: Cylinder 4 Misfire Detected

Code P0304 indicates a misfire in cylinder 4, which can lead to significant engine performance issues. This article explores common causes and implications of this diagnostic trouble code.

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MODERATE
Content Type
Diagnostic Guide
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Diagnostic Information

When your vehicle's engine control unit detects a misfire in cylinder 4, it triggers code P0304. This high-severity code can result from several issues, including a faulty spark plug, a failing ignition coil, or problems with the fuel injector specific to cylinder 4. Additionally, low compression in the cylinder or a leak in the intake manifold gasket near cylinder 4 can contribute to this misfire. Addressing these issues promptly is crucial for maintaining engine performance and preventing further damage.

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