WHAT DO THESE CODE MEAN ON A 2005 NISSAN ALTIM 2.5L SEDAN

Question

P0300
P0444
P0300 P/D
P0444 P/D

MIL ON
MONITRS
2 INC
EVAP
02 SENSOR
5 READY
MISFIRE
FUEL
COMP
CATLYST
02 HTR

Answer 1

Hi there,

There are only 2 codes here.

P0300 multiple cylinder misfire

P0444 purge control solenoid malfunction.

I would actually start with the purge control valve. If it's stuck open, it may be putting to many fuel vapors into the intake manifold and causing engine misfires.