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P0102 - MASS AIRFLOW (MAF) CIRCUIT LOW VOLTAGE INPUT
System: Combustion
The Mass Air Flow sensor is mounted on the vehicle's engine air intake duct.
It is used to measure the volume and density of air entering the vehicle. It is important to note that the Mass Air Flow (MAF) sensor only measures a portion of the incoming air,
and that value is used to calculate both the volume and density consumed.
The Powertrain Control Module (PCM) uses this reading along with other parameters from the MAF sensor, and in this way ensures that, at a predetermined time,
the fuel delivery is the most appropriate for optimum power and fuel efficiency.
This P0102 OBDII fault code means that a low condition exists in the MAF sensor or in its circuitry.
The Powertrain Control Module has detected that the actual frequency signal from the Mass Air Flow (MAF) sensor is not operating within the normal expected range.
Symptoms of fault code P0102 Generic
Check Engine light comes on.
Engine operation is erratic.
Black smoke comes out of the exhaust pipe.
Fuel consumption may be low.
Causes of OBD2 code P0102 Generic
Intake air may be leaking.
Mass Air Flow sensor wires or connectors may be shorted, rubbing against some other component causing a poor electrical connection.
Mass Air Flow (MAF) sensor may be contaminated or dirty.
The MAF sensor may be defective.
Possible solutions for Generic DTC P0102
Perform an inspection of all wires and respective connectors related to the Mass Air Flow (MAF) sensor. Make sure they are not worn,
or rubbing against any other components. If you find problems in one of these, proceed to repair it or replace it if necessary.
Check for air leaks in the intake system.
Inspect the MAF (Mass Air Flow) sensor and look at the wires or film, as it may be dirty or contaminated.
You can replace the air filter, which may be dirty. Also, if the air intake system includes a screen, make sure it is clean.
Carefully clean the MAF sensor with a spray cleaner.
This DTC code can be triggered by minimal air velocity passing through the MAF sensor orifice,
so make sure there are no vacuum leaks under the MAF sensor.
Using a scan tool, monitor the MAF sensor values in real time, as well as the Oxygen (O2) sensor values.
The Barometric Pressure (BARO) that is used to calculate the MAF sensor value is based on the Manifold Absolute Pressure (MAP) sensor ON key.
In DTC code can be set if there is a high resistance in the ground circuit of the Manifold Absolute Pressure (MAP) sensor. Repair if that is the case.
Replace the MAF sensor.
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