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What is the code PO102 on a 2002 Chevrolet Impala

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Code PO102 is mass air flow sensor circuit low frequency condition.what it is saying.MAF sensor element hot wire contaminated or sensor failed.MAF sensor signal shorted to ground or grounded circuit problem.MAF sensor wiring routed close to ignition wires generator solenoids or electric motors.PCM has failed.

Posted on Jul 14, 2009

  • Jonah Oneal Jul 14, 2009

    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.

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