A mass (air) flow sensor (MAF) is a sensor used to determine the mass flow rate of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine.
What happens when a mass air sensor goes bad?
A contaminated or failed mass air flow sensor cannot measure the amount of air flow correctly. This causes the engine computer to miscalculate the amount of injected fuel. ... As a result, a bad mass air flow sensor causes various driveability problems, including a no-start, stalling, lack of power and poor acceleration.9 jul 2021
Is a MAF sensor necessary?
Your Mass Air Flow Sensor (MAF Sensor) is a piece of technology within your engine which tells your car's computer how much air is entering the engine. This is important as it allows your engine to regulate its performance and change the intake of air to keep your engine running in its best condition.24 feb 2017
What does a MAF sensor do on a diesel?
APPLICATIONS. The air mass sensor precisely measures the air mass that flows into the engine (“mass air flow”). The signal from the air mass sensor is used to calculate the injected fuel quantity. In diesel engines, it also controls the exhaust gas recirculation.
Will my car run if I unplug the MAF sensor?
If you unplug the mass air flow sensor the car will start. If you try to plug it in while it's running the car will die.17 oct 2016
How do I know if I need to replace my mass air flow sensor?
- Stalling, jerking, or hesitation during acceleration.
- air fuel ratio is too rich.
- air fuel ratio is too lean.
What voltage should MAF idle at?
At idle maf voltage out should be ~1.0-1.5v volts, I can check for you in a bit what exactly it'll be.21 nov 2008
How do you test a MAF sensor?
Pop the hood open. Lightly tap the MAF sensor and electrical connector with a screwdriver handle. Wiggle the wires as well. If the engine stalls, idle is upset, or idle gets better, the MAF sensor is likely defective.25 jun 2021
What is a hot film sensor?
Hot-film sensors refer to small electrically heated elements used as constant temperature anemometers.