I have a 2009 Maxima SV and not long ago my service engine soon(not flashing) light came on.
With that said, it seemed to be running fine...
Not long after I realized i was getting horrible gas mileage.I went to the parts store and used theire scan tool and several codes popped up.1st one being P2A00.
Anyways it still seemed to run fine just gas mileage is trash...
So after talking to several people, they tell me that it's most likely an O2 sensor.
I've continued to drive it even though I'm getting horrible gas mileage.
So the other day I went to AutoZone and there you hook it up and then they hook it up to their system and it tells you a suggested fix.
​​​​​ The fix that was suggested was replace mass air flow sensor so I ended up just buying some MAF sensor cleaner and trying to clean the sensor, but unfortunately that didn't work.
I'm still getting horrible gas mileage(around 11 mpg)
can somebody please give me some advice on what my problem is?
Should I replace the MAF sensor or
is it one of my O2 sensors?