Error Code P0303 is a common error code that indicates a misfire problem in the engine's cylinder, specifically cylinder #3. An engine misfire means a lack of combustion, which can be a result of different issues, such as low compression, lack of spark, metering, unmetered air entering the engine or poor fuel quality.
Also question is, what does multiple cylinder misfire mean?
Code P0300 is a code that is generated when your engine has a misfire that is not related to only one cylinder. Sometimes this code will be set in addition to other codes such as P0301 which means that there is a misfire on cylinder 1 (cylinder 1 is the number one cylinder when looking at the firing order.
How serious is a cylinder misfire?
A misfiring cylinder can cause a proportional loss of power. For example, if one cylinder misfires in a four cylinder engine, the car will lose 25 percent of its power. Damaged, worn, or bad spark plugs, or a weak ignition coil can cause a loss of spark, and therefore, a misfiring cylinder.
What can cause a misfire in a cylinder?
This may be due to a vacuum leak, but it can also be caused by dirty fuel injectors, a weak fuel pump (low fuel pressure) or a faulty fuel pressure regulator. It can also be caused my ignition misfire due to worn or fouled spark plugs, bad spark plug wires, or weak ignition coil.