What is the code PO102 on a 2002 Chevrolet Impala

you can take a scanner to check mass air flow sensor.the mass air flow sensor out put on scanner in grams per second.with engine operating temperature and idling .it should be 4.0 to 6.0 grams.when engine is accelerated quickly the values should rise quickly.and remain steady at steady engine speed.if mass air flow sensor fail test replace it. you can take a scanner to check mass air flow sensor.the mass air flow sensor out put on scanner in grams per second.with engine operating temperature and idling .it should be 4.0 to 6.0 grams.when engine is accelerated quickly the values should rise quickly.and remain steady at steady engine speed.if mass air flow sensor fail test replace it.