P0300 NISSAN - sentra 2003

Question

I've change the catalytic converter, the o2 sensors& the fuel injectors now I have a p0300 code what to do next?

Answer 1

P0300 means that there are multiple cylinder misfiring. You could start by checking the spark plugs and make sure the injector are properly installed. Many time the injector seals get damage during the installation. If the plugs and injector are OK, then you need to perform a compression test. All cylinder should have the similar compression.