Mass air flow sensor fault symptoms being bad

MAF) sensor measures the volume of air entering the engine so the Engine Control Unit (ECU) can calculate how much gasoline the fuel injectors should deliver to each cylinder in order to create the proper fuel-air ratio. Sometimes, however, a malfunction in this little instrument can lead to big problems, usually resulting in very poor engine performance.

The faulty mass airflow sensor and how to fix the problem written by: nandy A vehicles MAF or mass airflow sensor, is the element that measures the density and flow of the air passing in to the combustion section.It assists the vehicles computer activate the air ratio to fuel.

Mass airflow sensor problems can cause a variety of symptoms from the annoying to the must repair. We'll discuss these in-depth on this page.

There are a number of things on a car that are built to regulate the amount of air and fuel that get mixed. The mass airflow sensor is one of the most important of these sensors due to the job that it performs.

How to tell you got a bad MAF

A bad mass air flow sensor in a vehicle makes starting difficult and affects the performance of the engine because he engine-control unit uses data from the MAF sensor to balance the fuel ratio the injectors deliver to the engine. A bad sensor returns a significantly different temperature than that of the engine coolant when read using a scan tool set to temperature.

MAF is a hesitation after the accelerator pedal is depressed. Some other common symptoms include the following:Difficulty startingStalling shortly after startingHesitation under loadJerking during accelerationErratic idle or operation Fuel-trim-related code(s)Excessively rich or lean idling, often causing black smoke from the tailpipeCommon Causes of MAF FailuresThe majority of MAF failures are due to dirt, paper, or oil contamination.

Stalling at stop signs while the vehicle is in gear on carbureted vehicles could be caused by a failing Idle Speed Control Motor. On fuel injected vehicles, you should look for failure in the Manifold Absolute Pressure Sensor, Mass Air Flow sensor, or restricted fuel injectors.

MAF sensor is not cheap.. so being able to say that it's truly BAD or not will save you some money.

Mass Airflow Sensor Replacement Service Cost - YourMechanic

A bad computer sensor can cause many problems. A sensor error code can be misleading.