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The P0304 code means that the engine control module has detected a misfire in cylinder #4 that needs your attention. Misfires in a car engine can be caused by a failing spark, low compression, or fuel delivery problems.
Diagnostic trouble code P0304 is used to indicate that multiple misfire episodes have been logged, in relation to an engine’s #4 cylinder. Simply put, a misfire is the relative absence of a complete combustion event, as anticipated upon a given cylinder.
The P0304 code is a diagnostic trouble code that indicates a misfire in the engine’s cylinder. It’s usually related to the misfire which occurs within the fourth cylinder, meaning that the cylinder remains unfired and that could disrupt the engine’s combustion cycle.
Replace faulty spark plugs or ignition coils in cylinder 4. Clean or replace the clogged fuel injector. Repair any vacuum leaks in the intake manifold. Perform a compression test to check for low compression in cylinder 4 and address any issues found.
Several potential triggers exist for a check engine light and a P0304 code. The problem can be due to a faulty spark plug/spark plug wire, a defective ignition coil or fuel injector, a vacuum leak, or a bad camshaft/crankshaft position sensor.
When the vehicle’s PCM/ECM notices an engine misfire, it sets up a particular trouble code. The engine code P0304 represents a misfiring in cylinder 4. This article mainly explains the P0304 code meaning, symptoms, causes, and how to fix it.
The P0304 code is a clear signal from the vehicle’s onboard diagnostics system, indicating that Cylinder 4 is experiencing a misfire. This error code is part of the broader range of OBD2 codes utilized for engine diagnostics across various makes and models of vehicles.
The P0304 code stands for “Cylinder 4 Misfire Detected”, which means your vehicle’s cylinder 4 has misfired enough times for your powertrain control module (PCM) to notice. A worn spark plug, a faulty fuel injector, and a leaking valve are some possible causes of the P0304 code.
When your car hits a bump with a P0304 code, signaling a misfire in cylinder 4, it's clear the engine's smooth performance is off-key. This issue can throw off your car's harmony, but there's no need to stress. By diving into what causes this misfire and how to fix it, you can get your engine humming beautifully again.
Engine power reduces. Fuel economy reduces. What are the causes of P0304? The most common causes of the P0304 trouble code are: Faulty or worn-out spark plugs.