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P010B MAF "B" Circuit Range/Performance

Technical Description

Mass Air Flow (MAF) "B" Circuit Range/Performance

What does that mean?

This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles (Nissan, Chevrolet, GMC, VW, Toyota, Mazda, Ford, Audi, Honda, 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.

Basically this P010B diagnostic trouble code (DTC) means that there is a problem with the Mass Air Flow "B" sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not within a predetermined expected range of the calculated MAF value. Refer to a make/model specific repair manaul to determine which is the "B" circuit for your vehicle.

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:

Photo of a MAF sensor:
MAF Sensor Mass Air Flow


Symptoms of a P010B code may include:

Possible Causes

Potential causes for this trouble code may include:

Note that other codes may be present if you have a P010B. You may have misfire codes or O2 sensor codes, so it's important to take a "big picture" look at how the systems work together and effect each other when doing a diagnosis.

Diagnostic Steps & Possible Solutions

Possible diagnostic and repair steps include:

If you do need to replace the MAF sensor, we recommend using an original equipment OEM one from the manufacturer rather than buying an aftermarket part.

Note: The use of a reusable oiled air filter could be a cause of this code, if it is over-oiled. Oil can transfer to the fine wire or film inside the MAF sensor and contaminate it. Use something such as MAF cleaner spray to clean the MAF in such situations.

Related P010B DTC Discussions

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