Nissan P0300 - Causes, Symptoms, and Fixes

[@Qghostz]

Please help 🙏 my Nissan 370z Nismo show P0300. I just replaced new ignition coils, spark plugs, both pcv valves with oem parts. Reset the code but after driving around 80 miles the P0300 come back. Do you have any recommendation??

[@sapphirejan2040]

What ended up being the problem?

[@adielgonzalez2517]

Same here on a Nissan titan 2004 new spark playas new coil over new injectors new intake manifold gasket and throttle body gasket checked all the wires to the fuel injectors with a tester What is wrong with

[@grzegorz4653]

@@adielgonzalez2517 Did you figure it out? I have the same problem, new sark pugs, coil, sensor, air filter, throttle body is clean... also nissan

[@adielgonzalez2517]

@@grzegorz4653 no not yet Just made a huge purchase at advance auto/ car quest I bought Bosch upstream o2 sensors down stream ntk o2 sensors some evap canisters 8 Ngk ignition coils because I bought a bunch of Amazon parts which I feel might be the problem. Also bought universal catalytic converters. They are having an 80% discount sale because they are going out of business so I took the opportunity to buy everything to remake my engine lol jk just the essentials I will be getting my o2 sensors Monday I will update then Usually for me I just need to drive the truck around not too much for the check engine light to come on so I should know right away I notice on my scan tool that the o2 sensor down stream wasn’t in the parameters it should be so I’m thinking faulty sensor from Amazon or bad catalytic converter

[@matthewjalbert8099]

Evap

[@carcarehacks]

Hi, please share your issue.