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P0102 - 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
What does this mean? What does this mean?
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.
What does this mean? What does this mean?
When is the code detected?
An excessively low voltage from the sensor is sent to Engine Control Module (ECM).
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine stall
- Engine running rough
- Excessive fuel consumption
- Excessive smoke
P0102 Description

The Mass Air Flow (MAF) sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM).

The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change.

P0102 Information for specific makes
P0102 ACURA Mass Air Flow Sensor Circuit Low Voltage
P0102 AUDI Mass or Volume Air Flow Circuit Low Input
P0102 BUICK Mass or Volume Air Flow Circuit Low Input
P0102 CADILLAC Mass or Volume Air Flow Circuit Low Input
P0102 CHEVROLET Mass or Volume Air Flow Circuit Low Input
P0102 CHRYSLER Mass Air Flow Circuit
P0102 DODGE Mass Air Flow Circuit
P0102 FORD Mass or Volume Air Flow Circuit Low Input
P0102 GMC Mass or Volume Air Flow Circuit Low Input
P0102 HONDA Mass Air Flow Sensor Circuit Low Voltage
P0102 HUMMER Mass or Volume Air Flow Circuit Low Input
P0102 HYUNDAI Mass or Volume Air Flow Circuit Low Input
P0102 INFINITI Mass or Volume Air Flow Circuit Low Input
P0102 ISUZU Mass Air Flow Sensor Circuit Low Frequency
P0102 JAGUAR Mass or Volume Air Flow Circuit Low Input
P0102 JEEP Mass Air Flow Circuit
P0102 KIA Mass or Volume Air Flow Circuit Low Input
P0102 LAND-ROVER Mass or Volume Air Flow Circuit Low Input
P0102 LEXUS Mass or Volume Air Flow Circuit Low Input
P0102 MAZDA Mass Air Flow Circuit Low Input
P0102 MERCEDES-BENZ Mass or Volume Air Flow Circuit Low Input
P0102 MITSUBISHI Mass or Volume Air Flow Circuit Low Input
P0102 NISSAN Mass or Volume Air Flow Circuit Low Input
P0102 OLDSMOBILE Mass or Volume Air Flow Circuit Low Input
P0102 PONTIAC Mass or Volume Air Flow Circuit Low Input
P0102 SATURN Mass or Volume Air Flow Circuit Low Input
P0102 SCION Mass or Volume Air Flow Circuit Low Input
P0102 SUBARU Mass or Volume Air Flow Circuit Low Input
P0102 TOYOTA Mass or Volume Air Flow Circuit Low Input
P0102 VOLKSWAGEN Mass or Volume Air Flow Circuit Low Input
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