p0102 MAF sensor low input. NEED HELP

Asked by Feb 29, 2016 at 01:51 PM about the 1996 Chevrolet Tahoe 2 Dr LS 4WD SUV

Question type: Maintenance & Repair

MAF sensor code p0102 low input comes up. Replaced the MAF Sensor has a
good ground and the positive is good putting out 5v. Cleaned out throttle
body,no vacuum leak. code still coming up after erased.

1 Answer

71,225

Check the intake manifold bolts, make sure they are just snug, I would not go more than 15 ft. lbs. torque on them, Vortec intakes known to leak. Here is whats what with the code P0102 CHEVROLET - Mass or Volume Air Flow Circuit Low Input... Possible causes... - Faulty mass air flow sensor - Intake air leaks - Dirty mass air flow sensor - Dirty mass air filter - Mass air flow sensor harness is open or shorted - Mass air flow sensor circuit poor electrical connection.. Some Tech notes... Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.. This DTC sets when the Powertrain Control Module (PCM) detects that the Mass Air Flow (MAF) sensor frequency is below a predetermined value. Possible symptoms... - Engine Light ON (or Service Engine Soon Warning Light) - Engine stall - Engine running rough - Excessive fuel consumption - Excessive smoke P0102 Chevrolet Description.... The Mass Air Flow (MAF) sensor measures the amount of air ingested by the engine. The direct measurement of the air entering the engine is more accurate than calculating the airflow from the Manifold Absulte Pressure (MAP), the Intake Air Temperature (IAT), and the engine speed (speed/density). The MAF sensor has a battery feed, a ground, and a signal circuit. The MAF sensor used on this engine is a hot wire type. This engine uses the MAF sensor in order to measure air flow rate. The MAF output frequency is a function of the power required to keep the air flow sensing elements (hot wires) at a fixed temperature above the ambient temperature. Air flowing through the sensor cools the sensing elements. The amount of cooling is proportional to the amount of air flow. The MAF sensor requires a greater amount of current in order to maintain the hot wires at a constant temperature as the air flow increases. The MAF sensor converts the changes in current draw to a frequency signal read by the Powertrain Control Module (PCM). The PCM calculates the air flow (grams per second) based on this signal. The PCM monitors the MAF sensor frequency. The PCM determines if the sensor is stuck low, stuck high, not providing the airflow value expected for a given operating condition, or that the signal appears to be stuck based on a lack of signal variation expected during the normal operation. This diagnostic tests for too low an airflow rate.

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

  • p0102 MAF sensor low input. NEED HELP 1 answer

    MAF sensor code p0102 low input comes up. Replaced the MAF Sensor has a good ground and the positive is good putting out 5v. Cleaned out throttle body,no vacuum leak. code still coming up after eras...

    1996 Chevrolet Tahoe 2 Dr LS 4WD SUV

    -

    Maintenance & Repair

  • 4wd low 1 answer

    I have a 07 Chevy Tahoe and it's stuck in 4wd low it's driving extra slow what do I do

    2007 Chevrolet Tahoe LTZ 4WD

    -

    Maintenance & Repair

  • Can anyone help me 9 answers

    I just changed out the orphans tube the accumulator the compressor and I changed out all the rings on it but still when I turn on the AC unit it does not blow cold like it was before and now it ma...

    1999 Chevrolet Tahoe 2 Dr LS SUV

    -

    Maintenance & Repair

  • 2005 Chevy 5.3 low oil pressure when cold 1 answer

    My '05 Tahoe is experiencing low oil pressure at startup. It runs around 30-35psi no matter whether it is idling or running at 2,000 rpm. After idling for a few minutes a lifter starts ticking as we...

    2005 Chevrolet Tahoe Z71 4WD

    -

    Maintenance & Repair

  • Will a bad oil pressure sensor cause problems 2 answers

    My engine light is on. The auto part store says it's a oil pressure sensor. I can't get the repairs right now. Will this cause problems for my truck?

    2007 Chevrolet Tahoe LTZ 4WD

    -

    Maintenance & Repair

Search Chevrolet Tahoe Questions

Chevrolet Tahoe Experts

#1 Tom Demyan
Tom Demyan
Reputation 810
#2 Rowefast
Rowefast
Reputation 800
#3 Lucia Taylor
Lucia Taylor
Reputation 490
View All

Related Models For Sale

Used GMC Yukon
379 Great Deals out of 19,293 listings starting at $2,000
Used Chevrolet Suburban
301 Great Deals out of 19,512 listings starting at $1,800
Used Ford Expedition
438 Great Deals out of 24,826 listings starting at $1,150
Used Ford Explorer
926 Great Deals out of 70,243 listings starting at $997
Used Ford F-150
2,068 Great Deals out of 207,301 listings starting at $1,499
Used Toyota 4Runner
259 Great Deals out of 19,034 listings starting at $2,500
Used Jeep Grand Cherokee
1,014 Great Deals out of 72,235 listings starting at $700
Used GMC Sierra 1500
761 Great Deals out of 69,110 listings starting at $1,850

Used Cars For Sale

2017 Chevrolet Tahoe For Sale
40 Great Deals out of 14,869 listings starting at $35,340
2016 Chevrolet Tahoe For Sale
51 Great Deals out of 2,236 listings starting at $31,643
2015 Chevrolet Tahoe For Sale
37 Great Deals out of 2,313 listings starting at $24,995
2014 Chevrolet Tahoe For Sale
17 Great Deals out of 621 listings starting at $11,995
2013 Chevrolet Tahoe For Sale
45 Great Deals out of 1,364 listings starting at $10,795

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.