P010B MAF "B" Circuit Range/Performance

P010B MAF "B" Circuit Range / Performance

Technical description

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

What does this mean?

This Diagnostic Trouble Code (DTC) is a generic transmission code, which means it applies to OBD-II equipped vehicles (Nissan, Chevrolet, GMC, VW, Toyota, Mazda, Ford, Audi, Honda, etc.). Although general, specific repair steps may differ depending on the brand / model.

The mass air flow (MAF) sensor is a sensor located in the vehicle's engine air intake tract after the air filter and is used to measure the volume and density of air drawn into the engine. The mass air flow sensor itself only measures a portion of the intake air, and this value is used to calculate the total intake air volume and density.

The powertrain control module (PCM) uses this reading in conjunction with other sensor parameters to ensure proper fuel delivery at all times for optimal power and fuel efficiency.

Typically, this Diagnostic Trouble Code (DTC) P010B means there is a problem with the "B" mass air flow sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not within the predetermined expected range of the calculated MAF value. Check with the repair technician for your specific make / model to determine which "B" chain matches your vehicle.

Note. Some MAF sensors also include an air temperature sensor, which is another value used by the PCM for optimal engine performance.

Closely related MAF circuit trouble codes include:

• P010A Malfunction of a circuit of mass or volumetric air flow "A"
• P010C Low input signal of the circuit of mass or volumetric air flow "A"
• P010D High input of the circuit of mass or volumetric air flow "A"
• P010E Unstable circuit of mass or volumetric air flow "A"

Photo of the mass air flow sensor (mass air flow):

symptoms

Symptoms of a P010B code may include:

• Malfunction Indicator Lamp (MIL) illuminated (also known as engine warning lamp)
• Roughly running engine
• Black smoke from the exhaust pipe
• stolling
• Engine starts hard or stalls after starting
• Possible other symptoms of handling

Possible reasons

Possible causes of this DTC may include:

• Dirty or dirty MAF sensor
• Faulty MAF sensor
• Intake air leaks
• MAF sensor wiring harness or wiring problem (open circuit, short circuit, wear, poor connection, etc.)
• Clogged catalytic converter on some models (mainly GMC / Chevrolet)

Note that other codes may be present if you have a P010B. You may have misfire codes or O2 sensor codes, so it is important to get a “big picture” of how the systems work together and affect each other when diagnosing.

Diagnostic steps and possible solutions

Possible diagnostic and repair steps include:

• Visually inspect all MAF wiring and connectors to ensure they are intact, not frayed, broken, routed too close to ignition wires / coils, relays, engines, etc.
• Visually check for obvious air leaks in the air intake system.
• Visually * carefully * inspect the MAF (MAF) sensor wires or tape to see contaminants such as dirt, dust, oil, etc.
• If the air filter is dirty, replace it.
• Thoroughly clean the MAF with a MAF cleaning spray, usually a good DIY diagnostic / repair step.
• If there is a mesh in the air intake system, make sure it is clean (mostly VW).
• Loss of vacuum at the MAP sensor can trigger this DTC.
• Low minimum airflow through the sensor hole can cause this DTC to set at idle or during deceleration. Check for vacuum leaks after the MAF sensor.
• Use a scan tool to monitor real-time values ​​of MAF sensor, O2 sensors, etc.
• Check Technical Service Bulletins (TSB) for your specific make / model for known problems with your vehicle.
• Atmospheric Pressure (BARO), which is used to calculate the predicted MAF, is initially based on the MAP sensor when the key is on.
• A high resistance in the ground circuit of the MAP sensor can set this DTC.
• Perform an exhaust back pressure test to determine if the catalytic converter is clogged.

If you really need to replace the MAF sensor, we recommend using the original OEM sensor from the manufacturer rather than buying replacement parts.

Note: Using a reusable oil air filter can cause this code if it is overly lubricated. Oil can get on the thin wire or film inside the MAF sensor and contaminate it. In these situations, use something like a MAF cleaning spray to cleanse the MAF.

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NOTE. This information is provided for informational purposes only. It is not intended to be used as a repair recommendation and we are not responsible for any action you take on any vehicle. All information on this site is protected by copyright.