Watch as our experts give you best practice advice and invaluable tips as they walk you through both common and complex jobs.

From servicing to inspections and repairs, you’ll find the guidance you need in our library of videos below.

How to page header image
How to test MAF sensor
1 min read

How to test a MAF sensor

Share Resource:
Sensors Vehicle Electronics & Engine Management How to Technicians 1 min read

Resource Highlights

Learn how to test a digital mass air flow sensor with our Delphi Technologies Expert, who shows you how to do it on a Ford Fiesta.

Are there different types of mass airflow sensors?

Yes. There are ones that give an analogue output, and ones that give a digital output.

What should the voltage be of a healthy mass airflow sensor?

On a digital sensor the voltage difference between minimum and maximum should be around 4.5 volts. If you get a different voltage reading, then it would indicate an electrical fault in the wiring.  As always check your data source as more sensor type with different operating voltages are entering the market.

What should the oscilloscope frequency look like of a faulty sensor?

In a healthy airflow sensor, the signal from the sensor should increase with the RPM of the engine. If the frequency shows a flatline, or a shallow increase that doesn’t match the speed of the RPM change, then that would indicate a fault with the sensor.
where to buy

Find out where to buy Delphi parts

where to repair

Find your nearest Service & Diesel Centres



Fill out your details to hear more from our experts and get the latest updates from Delphi.

Select your Region