How To Test A Mass Air Flow Sensor (Andy’s Garage: Episode - 287)

Thanks for the great video, Mate. How do you know that the yellow was the signal wire, for the red meter probe to connect to, or does it matter? Could you have put the meter probes on the other way and it would have read negative; or would it cause damage? Thanks again, my friend🙏👍

Thanks for taking the time to show how to check the unit.

Great video. I've just learnt something new. Can you do a video on how to test the O2 Sensors please

My harness plug doesn't allow for pin to go in back.

Hello, Thank you for a good explanation

Is there a fuse for that circuit? Am not getting any power.

Great video, I had to watch it few times to understand it. 😊

hello there! i have the 2015 verso 1.6 diesel and the check engine light comes on with a p00bd fault code which refers to the mass air filter. i've done everything from changing the maf sensor to cleaning the air intake manifold but the faults pops up again and again. my electrician has inspected it twice and sais there is no wiring problem. any idea what it can be???

I have ground in all the cables

Hi I have a 2012 sciom Iq and is ideling I change the throtle but no change on the idle any suggestions pleace

It's nice to see how it looks like when you have a bad one. Now no need to doudt if bad or good. Thanks

At back probing You show where you connect the red lead of multimeter. Next you say you Connect the multimeter ground to the other....other what ????????? Ground ? Other back probe? Other. What.????

Great videos it seems I'm having transmission issues 'which can be a symtom of a bad mass air flow sensor 'sense my transmission is good

Easier test start vehicle un plug mass air flow sensor if it dies
it's good if it keeps running it's bad

My maf sensor has 8 wire

Thank for that video it’s super helpful to me. I don’t need to know the sensor resistance… i Just want to know if the sensor is doing it job. Testing resistance is only relevant, if you want to repair the faulty sensor.

i cant keep the motor running it shakes ans dies what can i do ??? thank you

What conclusion did you find after changing the sensor? Please reply.

Will this test work on a hybrid car also...Toyota prius

Do I need to reprogram the CU when I replace the MAF with a new one? Thanks, best wishes from Saudi Arabia🖐

Sir…good step by step, however on your back probe description, you put your stripped wire in the sensor line, but what wire/line was the red multimeter probe inserted. Thank you

I had a mechanic that ripped The Wire off my harness that went to the air mass flow sensor this is a good video

Is it showing an engine check on the dashboard indicating a foulty maf?

Is it showing an engine check

I had a black wire with 12 volts and a white wire with 4.49 volts or signal wire. Red was my ground. LOL

Since the car won't stay running after starting it, it's difficult to test it. I was hoping for a standardized resistance between the different pins or something like that.

Awesome video

1999 Toyota Avalon car with a v6 engine that cranked but wasn't starting.
After engine rebuild and gear oil replaced . While test driving by the engineer , smoke started emanating from the engine bay. Precisely, from the fan relay that the car owner connected by himself. Within few minutes, the car shutdown by itself as if fuel is finished.

Presently, it's a crank a crank no start, no spark, no injector pulse, check engine light staying ON with ECU connected or removed.
I tried to scan for DTC codes, but my scanner wasn't communicating. I checked all fuses, power and ground at obd port, those checked ok. but my scanner isn't compatible to read CAN network. There are only 4 wires intact for the obd2 port.
Furthermore, I added fuel through the intake to the engine, no change at all. I checked for spark and injector pulse. These things weren't present. But there was power to injector with just the key at ignition or ACC and COP had 1 ground and 1 power as usual.
With the ECU removed battery connected, Engine light would come ON. with ECU connected check light still comes ON.
Before I left, I checked the MAF sensor 5 wires and noticed that 3 wires were earth instead of 2 and 1 power; no ignition current/ power was available for the remaining 2 wires.
Please, what should I do
to get this car running again?

Great video! ❤

Thank you for the step by step.

All these videos only show how to test a wire harness for it. How do you check for the resistance on just the sensor it’s self

20 volts dc

Just wondering if you checked out a new MAS for rising voltage to double prove the first one was faulty?

My 95 lincoln mark viii motor, in my 67 f100 seems to snap and pop and crackle when its cold. I notice it as the temperature gets cooler towards the fall. I've cleaned the MAF but it still does it. Any suggestions.?

Hi Phillip Great video I have a 2009 Murano V6 I replace the fuel pump but still no start spin over good I can hear the pump run when I turn the switch on, can I still check the Mas air flow sensor if it's not running Thanks