Basically, the diagnostic code P0300 indicates us the ECM (Engine Control module) has detected that one or more cylinders are not fulfilling their function at the time of combustion.
This DTC defines us that the ignition failure is random or multiple, in addition the last digit of this code corresponds to the cylinder that is failing, in this case it is 0, it means that it is not known, specifically which cylinder is the one that is not working correctly or why?