Diagnostic Trouble Code
P0100
MAF Circuit Malfunction
Technical Description P0100
Mass or Volume Air Flow (MAF) Circuit Malfunction
What Does This Mean P0100?
This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles that have a mass airflow sensor. Brands include but are not limited to Toyota, Nissan, Vauxhall, Mercedes Benz, Mitsubishi, VW, Saturn, Ford, Jeep, Jaguar, Chevy, Infiniti, etc. Although generic, the specific repair steps may vary depending on make/model.
The MAF (mass air flow) sensor is a sensor mounted in a vehicle's engine air intake tract downstream from the air filter, and is used to measure the volume and density of air being drawn into the engine. The MAF sensor itself only measures a portion of the air entering and that value is used to calculate the total volume and density of air being ingested.
The powertrain control module (PCM) uses that reading along with other sensor parameters to ensure proper fuel delivery at any given time for optimum power and fuel efficiency.
This P0100 diagnostic trouble code (DTC) means that there is a detected problem with the Mass Air Flow (MAF) sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not performing within the normal expected range of the calculated MAF value.
Note: Some MAF sensors also incorporate an air temperature sensor, which is another value used by the PCM for optimal engine operation.
Closely related MAF circuit trouble codes include:
The MAF (mass air flow) sensor is a sensor mounted in a vehicle's engine air intake tract downstream from the air filter, and is used to measure the volume and density of air being drawn into the engine. The MAF sensor itself only measures a portion of the air entering and that value is used to calculate the total volume and density of air being ingested.
The powertrain control module (PCM) uses that reading along with other sensor parameters to ensure proper fuel delivery at any given time for optimum power and fuel efficiency.
This P0100 diagnostic trouble code (DTC) means that there is a detected problem with the Mass Air Flow (MAF) sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not performing within the normal expected range of the calculated MAF value.
Note: Some MAF sensors also incorporate an air temperature sensor, which is another value used by the PCM for optimal engine operation.
Closely related MAF circuit trouble codes include:
Symptoms P0100
1
Malfunction indicator lamp (MIL) illumination (a.k.a. check engine light)
2
Rough running engine
3
Black smoke from tail pipe
4
Stalling
5
Engine hard start or stalling after it starts
6
Possible other driveability symptoms or even no symptoms
Possible Causes P0100
1
Dirty or contaminated mass air flow sensor
2
Failed MAF sensor
3
Intake air leaks
4
MAF sensor electrical harness or wiring problem (open, shorted, frayed, poor connection, etc.)