The code signals an ignition failure.  Many 2k Maximas have been prone
to premature ignition coil failure. Even though only one may actually
be bad at present (thus causing the misfire and P1320 code) - the
general consensus among other 2k max owners has been to replace all
the coils at one time with the updated part.  You can buy all 6 coils
for about 300 bucks from one of several places, e.g. courtesy nissan,
jerry rome nissan (jrnissanparts.com), everythingnissan.com, and
replace them yourself in under an hour.

HTH,
Nirav
96 Max GLE, 111k