Code P0300

Hi,

A P0300 indicates a random misfire. This can be the result of many different things. For example, low or high fuel pressure, an engine vacuum leak, the need for a tune-up, low compression, and so on.

What I would suggest first is this based on the mileage, check to see if any vacuum hoses have become hard and brittle and have broken or come disconnected. Here is a link that shows how that is done:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Next, when was the last tune-up? Have you ever had the fuel filter replaced?

Here is a link that explains how a general tune-up is done. Take a look through it and let me know if you are comfortable doing it. If you want to do it, I can help you through it if you need me to.

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Let me know. Also, you may want to have the code cleared so you can see if it comes back again. Something may have caused it one time and that's it.

Let me know as much as you can. Also, let me know if this is the original engine.

Take care,

Joe