Mass air filter sensor problem

The P0171 refers to a possible lack of fuel pressure a leak in the intake air system or a possible vacuum leak. Unplug the mass air flow sensor electrical connector.

A faulty MAF sensor can cause your vehicle to run too rich or run too lean.

Mass air filter sensor problem. The mass air flow MAF sensor part of your vehicles electronic fuel injection system is responsible for calculating the total amount of air entering the engine. A faulty MAF sensor can cause your vehicle to run too rich or run too lean. Youll notice if the tailpipes eject black smoke or when the engine runs rough or backfires.

Therefore the most common signs of a bad mass air flow sensor usually appear in the form of an engine that is performing badly. Here are some of the most common bad mass air flow symptoms that you will typically come across. Check Engine Light appearing on the dashboard.

A bad mass air flow sensor will usually trigger a check engine light. This is because the ECU will detect an out of range value coming from the MAF sensor and the check engine light is its way of letting you know that. Go With the Flow.

When the MAF sensor isnt working youll know it. First off your air-fuel ratio will be wrong so youll have a case of lean or rich mixtures. So your fuel economy will fall and your performance will suffer.

The replacement cost of a mass air flow sensor can be anywhere from 80 to 390 if having a mechanic do it for you. The parts cost should be between 50 and 320 while the labor costs will be anywhere from 30 to 70. The true cost will depend on the make and model of your vehicle as well as whether the new MAF sensor is OEM or aftermarket.

The mass air flow sensor is prone to failure due to age or other factors affecting its performance. Common pollutants like dirt and dust are the major reason behind a failing air flow sensor. However seeing as it functions all the time when you run your car it is understandable that the sensor often fails sooner rather than later.

Common signs of problems with a mass airflow sensor include running rich at idle or lean under load decrease in fuel efficiency and rough idles. By Ed Ruelas on January 08 2016 1. Runs rich at idle or lean under load.

If there is no vacuum leaks and the air induction hose is in good shape its possible that a dirty mass airflow sensor is the problem. This can display the same problems and symptoms as a defective part. Any vehicle with over 20000 miles might experience problems due to contamination buildup on the heated element of the MAF sensor.

MASS AIR FLOW SENSOR INVESTIGATION. No dealership or service provider when contacted has ever been able to provide us with evidence to support this myth and in fact our investigations have revealed that even authorized dealerships are simply speculating and do not have the test equipment necessary to know whether the sensor has failed or why. Locate the mass airflow sensor near the engine air filter housing.

Press the red clip slightly to unlock it. Unplug the electrical connector from the mass airflow sensor. Remove the screws that hold the mass airflow sensor in place.

The P0171 refers to a possible lack of fuel pressure a leak in the intake air system or a possible vacuum leak. The P0102 also leans towards a leak in the intake air system. It is possible that there is a problem with a BARO barometric pressure sensor that is reading faulty.

On top of testing the mass airflow sensor by disconnecting it you can also test some of your vehicles other sensors by disconnecting the mass airflow sensor. If the car dies when you disconnect the mass airflow sensor then that means it was working right and that your computer has issues. The mass airflow sensor commonly abbreviated to MAF is one of the most important engine management sensors.

A bad mass airflow sensor can leave your Ford Rangers engine running rough or even inoperable. A MAF sensor measures the density of the air entering the intake manifold. It passes this information onto your Rangers ECU.

How Mass Air Flow Sensors Work As your engine sucks in fresh air it needs to flow through the MAFs bore and over a heated sensing wire or resistor. And as we all know when you blow on something it gets cooler. The mass airflow sensor commonly abbreviated to MAF is one of the most important engine management sensors.

A bad mass airflow sensor can leave your Ford F150s engine running rough or even inoperable. A MAF sensor measures the density of the air entering the intake manifold. It passes this information onto your F150s ECU.

Locate the MAF sensor next to the engine air filter housing. Unplug the mass air flow 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. Nissans mass airflow sensor sends a voltage to the powertrain control module PCM.

The most reliable early symptom of a failing or failed MAF is the illumination of the check engine light on the instrument panel. Many types of problems may cause this light to come on so you must have your cars computer analyzed to see if the light is related to the mass airflow sensor. In modern engines the engine control module ECM measures or calculates air flow via either a mass air flow MAF or manifold absolute pressure MAP sensor.

Turbocharged engines may use both but naturally-aspirated engines typically use one or the other. If the MAP sensor is failing or broken the ECM and thus the engine cant. As air comes into your engine it first passes through the engine air filter.

Dust road grime pollen and other dangerous contaminants are hopefully trapped in the filter. If the engine air filter becomes clogged some of the pollutants can pass through and hit the MAF sensor. Thus a clean engine air filter protects your MAF sensor.

But back to the debate. People around the country are bringing their cars to dealerships and mechanics with MAFMass Air Flow Sensor problems. What causes MAF problems.

The dealerships claim excess oil from KN filters is to blame. The KN representative however gave a compelling argument.