Question

Nissan Frontier 2011 Code P0300 detected. What is the issue?
need help.

Answer 1

Hi there,

This code can be brought on by several things. I would start by checking for intake manifold gaskets leaks, the mass air flow sensor. Also, low fuel pressure and sometimes even a plugged up catalytic converter can bring this on. This can happen even without any codes for the converter. I would also consider the age and mileage of the spark plugs. IF you're over 60k, it may be time for a new set.