P0304 ERROR CODE: MEANING, SYMPTOMS, CAUSES AND SOLUTIONS (Cylinder 4 Misfire Detected)
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 Published On May 14, 2023

P0304 ERROR CODE: MEANING, SYMPTOMS, CAUSES AND SOLUTIONS (Cylinder 4 Misfire Detected). In this video, we will discuss how to Fix P0304 Error Code.

The P0304 error code indicates a misfire in cylinder 4 of a vehicle's engine. It simply means that the fourth cylinder is not firing as it should. It is not a serious problem if diagnosed and rectified early, but a delay in rectification can cause engine failure. It is like having four candles in a row, which should light simultaneously to give the needed light, but the fourth candle goes off unexpectedly or fails to light properly. You end up with a darker room.

In this case, the engine produces less power when cylinder 4 misfires.

What are the common signs to look out for when checking for this issue?
1. Check Engine Light (CEL) Illumination – this must be followed by identifying the diagnostic trouble code (DTC) to be sure why the check engine light is on.
2. Rough engine Idling – several factors could cause this; hence, the need for proper diagnosis.
3. Loss of Power or Poor Acceleration – the vehicle does not accelerate normally.


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