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#PO 300 CODE#

You should start by checking the spark plugs and replacing any that need it. This is, by far, the most common cause for this issue. If that is not the issue, you will need to check the other usual causes.Ĭhances are extremely high that the cylinder if misfiring due to a faulty spark system.

#PO 300 CODE#

You are probably now wondering, “How do I fix trouble code P0304?” First things first, if your car is not experiencing any of the usual symptoms, you should check the sensors for faults and replace them if necessary. Additionally, a car that is not firing on all cylinders may be inherently more dangerous to drive. If you do not fix whatever is causing the cylinder not to fire, it may cause serious and irreversible damage to your catalytic converter or engine, which are two of the most expensive parts to replace.

However, the cause of this problem may cause other problems much sooner. It may lead to further engine damage if not addressed for a long time. If your cylinder really is misfiring, your vehicle probably will suffer these symptoms:Ī cylinder not firing correctly is a serious problem. It can be useful to know what the symptoms of a real problem are, so you can tell whether something is seriously wrong or if the sensor just needs to be replaced. Symptoms To Look ForĪny error code can be triggered by a faulty sensor. The P0304 error code indicates that the number four cylinder specifically is failing to fire.

An exhaust gas recirculation malfunction.

The error code simply tells you that it is misfiring, rather than why. This combustion is what is considered the cylinder “firing.” There are many different things that can cause the cylinder not to fire correctly. The cylinder down by an air-fuel mixture which is exploded by a spark, and the motion of the cyliders turns the crankshaft and eventually turns the wheels. This is the part of the engine that actually produces the power. So what does the code P0304 mean? To understand what a cylinder misfiring means, you need to understand what the cylinders are.