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MAZDA 3 MASS AIR FLOW SENSOR PROBLEMS CODE

A high resistance on the ground circuit of the MAP.

MAF value is initially based on the MAP sensor

The barometric pressure (BARO) that is used in order to calculate the predicted.

Check for Technical Service Bulletins (TSBs) for your particular make/model in case of known issues on your vehicle.

Use a scan tool to monitor real-time sensor values from the MAF sensor, O2 sensors, etc.

A low minimum air rate through the sensor bore may cause this DTC to setĪt idle or during deceleration.

Loss of vacuum to the MAP sensor can trigger this DTC.

If the air intake system has a mesh in it, make sure that is also clean (VWs mainly).

Carefully clean the MAF using MAF cleaner spray is generally a good DIY friendly diagnostic/repair step.

If the air filter is dirty, replace it with a new original equipment filter from the dealer.

Visually *closely* inspect the MAF sensor wires or film to see if you can see contamination such as dirt, dust, oil, etc.

Visually inspect for any obvious air leaks in the air intake system.Visually inspect all MAF sensor wiring and connectors to make sure they are intact, not frayed, broken, routed too close to ignition wires/coils, relays, motors, etc.What can I do to diagnose and repair a P0104 engine code? 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. Note that other codes may be present if you have a P0104. MAF sensor electrical harness or wiring problem (open, shorted, frayed, poor connection, etc.).Dirty or contaminated mass air flow sensor.

MAZDA 3 MASS AIR FLOW SENSOR PROBLEMS CODE

Potential causes for this trouble code may include: Possible other driveability symptoms or even no symptoms.Engine hard start or stalling after it starts.Malfunction indicator lamp (MIL) illumination (a.k.a.Note: Some MAF sensors also incorporate an air temperature sensor, which is another value used by the PCM for optimal engine operation.Ĭlosely related MAF circuit trouble codes include P0100, P0101, P0102, and P0103. Is not performing within the normal expected range of the calculated MAF value. The PCM detects that the actual MAF sensor frequency signal This P0104 diagnostic trouble code (DTC) means that there is an intermittent or erratic fault detected in the Mass Air Flow (MAF) 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. 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 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. Although generic, the specific repair steps may vary depending on make/model.

Brands include but are not limited to Ford, Mercedes, Peugeot, Toyota, Honda, Citroen, Nissan, VW, Jeep, Chevrolet, Dodge, etc. 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. Mass or Volume Air Flow Circuit Intermittent/Erratic What does that mean? P0104 Mass Air Flow MAF Circuit Intermittent Technical Description