And a signal wire goes to the ECU back, informing the ECU about the state of temperature of the ambient air.Ī reference volt is a constant voltage given by the ECU to the electronic component in the car, which does not change its value due to variation in temperature, loading on the device, or passage of time. The mass air flow sensor can be damaged or can collect dirt with time, and may send inaccurate readings to the computer, resulting in performance problems. In mass air flow there is an air intake temperature (IAT) sensor integrated into the MAF sensor, which has two additional wires, a power, and a signal wire.Ī power wire comes from the ECU, which is usually a 5-volt reference voltage. Nissan Maxima owners have reported 5 problems related to mass air flow sensor (under the electrical system category). The MAF’s signal wire gives the signal to the ECU. The ground wire gives earth to the MAF sensor and is usually taken from PCM, or sometimes, it is earthed somewhere in the chassis. Usually, this hot power wire is taken from the fuse box’s fuse and relay. Replace it and that's all.5 Wire Mass Air Flow Sensor Wiring Diagram 5 Wire Mass Air Flow Sensor Wiring DiagramĪ five-wire MAF sensor consists of five wires.Ī MAF sensor power wire gives a positive current to the MAF sensor. The sensor has to be completely dry before it can be reinstalled in your2012 Nissan Maxima otherwise you may damage it. Another option would be to go to your local auto parts store and buy a special mass airflow sensor cleaner, and spray it onto your sensor, but as stated before, this is more expensive.Īfter cleaning your mass airflow sensor with either the cleaner, or rubbing alcohol, let it sit, generally for 20 minutes or more.
Take the bag and move it around, making sure the alcohol washes all of the dirt and grime from the sensor. in Nissan Pathfinder are clogged air filter, dirty mass air flow sensor (MAF). The cheapest option would be to take your mass airflow sensor and place it in a plastic bag filled with rubbing alcohol. 2007 maxima engine problem (rpm issue) With my car running (warm). If your hands slip off the connector, it is good to wear gloves with a rubberized coating. Make sure you only pull on the connector and not the wires. While pulling the connector, squeeze the tab on either side of the harness. Breaking one will require a replacement, which can run upwards of $ 100, so it's best to be cautious. Disconnect the mass airflow sensor from the electrical connector. A disconnected mass airflow sensor can't electrocute you, but the wires are delicate and small. The 'Service Engine Soon' light came on our 2011 Nissan Altima so I headed to our local O'Reillys to have them read the computer. When removing the sensor, be sure to never touch the wires. This is done by opening your 2012 Nissan Maxima 's air box and using a flathead screwdriver to pluck it out. To clean your mass airflow sensor, first, you must take it out. Cleaning it when you change or clean your air filter will be a good way to save both time and money. Generally, you'll want to clean your mass airflow sensor either every six months, or every time you change your oil.
2012 NISSAN MAXIMA MASS AIR FLOW SENSOR PROBLEMS CODE
In most cases, a faulty mass flow sensor has a specific code that will generate during computer diagnostics, and is usually easy to determine with computer testing equipment. Qualified technicians are : properly trained individuals who have the equipment. Nissan Bulletins are intended for use by qualified technicians, not do-it-yourselfers. If you believe your 2012 Nissan Maxima has a faulty mass air flow sensor, take it to a qualified mechanic so that a complete computer diagnostic can be run. The MIL is ON with DTC P0101 for Mass Air Flow sensor. Separate the intake hose from the MAF sensor.Unclip the air filter box cover. Loosen the air intake hose clamp with an 8mm socket and ratchet or flat blade screwdriver. Disconnect the MAF sensor electrical connector. Hesitation and jerking during acceleration step 1 : Removing the Mass Airflow (MAF) Sensor. The engine hesitates or drags while under load or idle The engine is very hard to start or turn over Xterra ) Frontier, XTerra MAF Sensor Test P0100: Mass Air Flow (MAF). Here are some of the most common symptoms of a faulty mass airflow sensor: Buy 2001 Nissan Frontier spark plug wires by Buy Genuine OEM Nissan Parts And.
Symptoms of a Faulty Mass Air Flow SensorĪ faulty mass airflow sensor will cause problems similar to low compression or low vacuum, and will also show symptoms similar to when your 2012 Nissan Maxima has low fuel pressure from a faulty fuel pump. When a vehicle's mass airflow sensor is faulty or defective it can cause a variety of problems, and usually results in very poor performance from your engine. The air mass information is necessary for the ECU to correctly balance and deliver the correct amount of fuel to the engine. Sensor (MAS) determines the mass of air entering a vehicle's fuel injection engine, and passes that data to the Engine Control Unit, or ECU.