In this guide, you will learn about the Nissan Mass Air Flow (MAF) sensor, a common problem with Nissan MAF, how to diagnose it, replace and carry MAF relearn procedure.
This is a list of common symptoms you will notice when your Nissan MAF sensor fails.
- Check engine light on
- Nissan is hard to start
- Engine stalls soon after starting
- The engine runs unusually lean or rich idling
- Vehicle idles to high or low
- Nissan hesitates when under load.
- Vehicle hesitates and jerks during acceleration.
- High fuel consumption, poor MPG.
How to Diagnose Nissan MAF Sensor Problems
To diagnose the Nissan MAF sensor you will need to read the fault codes stored in the Engine Control Unit (ECU).
For this step, you will need an OBD2 scanner.
- Locate the diagnostic port under the dashboard, on the driver's side.
- Plug your diagnostic scanner in this port.
- Turn on the ignition but do not start the engine.
- Allow your scanner to turn on and communicate with the ECU.
- Select Read Codes from the main menu.
Fault codes such as P0171 System Too Lean (Bank 1), P0174 System Too Lean (Bank 2) and P0101. Dirty, obstructed, or faulty mass airflow sensor. Write down these codes research them to find out what each code means.
How to Replace Nissan MAF Sensor
Replacing the MAF sensor on a Nissan vehicle is very easy.
What you will need
Pull the hood release under the dashboard and open the hood of your Nissan.
Locate a mass airflow sensor in the engine bay. Nissan MAF sensor is located right next to the engine air filter housing, typically on the driver's side.
- Unplug the electrical connector from your Nissan mass airflow sensor.
- Watch the following video on how to remove the air filter box to access the MAF sensor.
Remove the screws that hold the mass airflow sensor in place.
- Install the new MAF on your Nissan. Tighten the screws so that they are secure and tight. Plug the electrical connector until it locks in place.
- A defective Nissan Quest mass airflow sensor could make your car difficult to start.
- The input from the mass airflow sensor is used by your Quest ECU to determine the fuel ratio that the injectors need to deliver to the engine.
If your check engine light is still on, use an OBD2 scanner to clear any stored codes in the ECU.
How to Clean Nissan MAF Sensor
Cleaning the MAF sensor on a Nissan is easy and takes less than 10 minutes.
- Pull the hood release and open the hood.
- Locate the MAF sensor next to the engine air filter housing.
- Unplug the mass airflow sensor electrical connector.
- Remove the two screws that hold the MAF sensor secure and remove the MAF sensor.
- Spray 8 to 12 spurts of MAF sensor cleaner on the exposed plate.
- Allow the MAF sensor to dry and reinstall.
Nissan's mass airflow sensor send a voltage to the powertrain control module (PCM). The hot wire sensors typically have an operating range of 0 - 5 volts
At idle the voltage under 1 volt.
At full throttle, voltage is normally between 4 and 5 volts.