My 2013 nissan altima gives me a code P0300- to many
rapid misfires and replace mass air flow sensor
Sounds like your plugs are no good, oil, carbon built up, change them out, this should correct the issue..
Well, you could take to your independent mechanic.?
Don't plugs usually last for 100,000 miles? It's hard to imagine that you have more than 100,000 miles already on a 2013 car? Maybe I'm wrong?
Looking for a Used Altima in your area?
CarGurus has 85,584 nationwide Altima listings starting at $695.
Search Nissan Altima Questions
Nissan Altima Experts