Which is part of the air mass sensor?
The complete air mass sensor consists of a flow passage (tube), in which the intake air flows past the sensor unit itself. Depending on application and vehicle, the air mass sensor is available as a single plug-in module, or fully integrated min a plastic tube. Both versions – with or without tube – are referred to as air mass sensors.
How is the air mass of a hot film sensor measured?
The air cools the hot-film sensor as it flows in. The control electronics counter- balance this cooling by means of a heating current. This heating current is the measurement for the inflowing air mass. This method takes account of the density of the inflowing air.
How to tell if your air flow sensor is bad?
Quick test to tell if Mass Air Flow Sensor is bad or dirty which could be causing your car or truck to run bad or keep cutting off. Quick test to tell if Mass Air Flow Sensor is bad or dirty which could be causing your car or truck to run bad or keep cutting off. Skip navigation Sign in Search Loading… Close This video is unavailable.
Why is my air mass sensor not working?
Defective or contaminated air mass sensors can convey incorrect signals. Leakages in the intake air system can allow dirt particles to enter with the intake air. These then hit the air mass sensor at high speed and destroy the delicate sensor element. Excess oil mist from the crankcase ventilation can oil up the sensor.
How does the mass air flow sensor work?
Regardless of the type of MAF, the sensors work similarly. The sensor, located between the air filter and the intake manifold, contains a hot wire and a temperature sensor. The hot wire is heated with an electrical current. As your vehicle accelerates, the throttle opens, allowing the air that enters the engine to pass through the MAF.
What kind of air flow sensor do I need for my MAF?
Depending on the year and make of the vehicle, you may find different types of mass air flow sensors, from the old-style vane air flow meter to the modern era hot-wire mass air flow meter. Since hot-wire technology is the most widely used today, we’ll assume that your MAF is using that design.
What are the symptoms of a bad mass air flow sensor?
Symptoms of a bad mass air flow sensor include decreased fuel economy, starting trouble, stalling shortly after starting, rough idling, and jerking during acceleration. If your check engine light is on and your car has any of these symptoms, you can check the MAF sensor with an OBD-II code reader.
What causes a MAF sensor to report false values?
> Sensor internal condition: it’s very common to find a MAF sensor reporting false values due to a clogged or dirty hot-wire cavity. Air entering the engine may have oil particles as well as dust and other pollutants that decrease the MAF sensibility over time.