It could be a few things. If you clear the code, does it come right back? A random misfire can result from a few different things. For example, a deviation in fuel pressure from the manufacturer's specs, a weak coil. Is the P0300 the only code you get?
Another thing to consider is engine compression. With the mileage on the vehicle, there is a chance one or more of the cylinders is weak.
Let me know. Also, let me know if you have a live data scan tool. If you do, let me know the short term fuel trims.
Take care,
Joe
Friday, October 30th, 2020 AT 4:42 PM