Mazda Mass Air Flow (MAF) Sensor | Symptoms | Repair

Learn about the symptoms of a bad Mass Airflow sensor (MAF) on Mazda vehicles and how to replace it yourself. When the mass airflow (MAF) sensor on a Mazda fails, the check engine light will turn on, and several performance issues will be noticed.

Symptoms

Here is a list of possible symptoms you may notice from a bad mass airflow sensor on a Mazda.

• Check engine light on
• The engine refuses to start
• The engine dies after the start
• Poor fuel economy
• Engine idles to high or low

What you will need

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Mazda PE01-13-215 Mass Air Flow Sensor

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• Mazda Air Flow Sensor
• Philips Screwdriver

Procedure

1. Let the engine cool down. Next, open the hood of the Mazda and disconnect the battery.

   Locate the mass airflow sensor on your Mazda 5. The sensor is located near the engine air filter housing. 

2. Unplug the wire harness. Next, unplug the electrical connector from the Mazda mass airflow sensor.  
3. Remove the screws that hold the mass airflow sensor in place.
4. Install the new MAF on your Mazda. Tight the screws so that they are snug.
5.  Plug the electrical connector until it locks in place.

6. Close the hood and start the engine.

If the check engine light is on, don’t expect it to turn off immediately. If no other fault codes are present, the check engine light should reset within a week. If not, follow this guide on troubleshooting the Mazda check engine light.

If you want to check for other codes or reset the check engine light, use an OBD2 scanner to clear the fault codes. The OBD2 scanner can be connected to the diagnostic port under the driver’s dashboard.

Mazda Mass Air Flow Fault Codes

A bad mass flow sensor on a Mazda may trigger possible fault codes.

• P0101 MAZDA Mass Air Flow Sensor Inconsistent with Throttle
• P0102 MAZDA Mass Air Flow Circuit Low Input
• P1100 MAZDA Mass Air Flow Sensor Intermittent
• P0100 MAZDA Mass Air Flow Sensor Signal Out Of Range
• P0103 MAZDA Mass Air Flow Sensor High Input Signal
• P0171 MAZDA Lean Air/Fuel Ratio Bank 1
• P0172 System too Rich (Bank 1)
• P0173 Fuel Trim Malfunction (Bank 2)
• P0174 System too Lean (Bank 2)
• P0175 System too Rich (Bank 2)

Other DTCs not listed here may be related to the MAF sensor.

Check Engine Light Still On

If you need to reset the check engine light after you have replaced the mass air flow sensor, you can use the YOUCANIC Full System Scanner to clear the stored codes and remove the check engine light on your Mazda. This scanner also can read and clear codes through every control module of your vehicle.