Q: p0300 code

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dont know where to start

My car has 164000 miles.
My car has an automatic transmission.

P0300 is a random misfire code that can indicate any or all cylinders have intermittent misfires. Was this code found with an auto parts code reader or a full on scanner ? Sometimes those code readers will only give a general code like P0300 to indicate a misfire where a full on scanner may actually see something like a P0301 - misfire on cylinder #1, for example. If the code was found with a code reader, it may be best to have a certified technician with a full scanner look into the misfire codes. However, if it is found that one ignition coil is misfiring, you may want to consider just replacing them all and fresh spark plugs if they have not been replaced in some time. Typically when one coil fails, others will not be far behind. Rather than deal with a misfire code and an individual failed coil every few months until you’ve replace them all, replacing them all at once may save you the inconvenience.

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