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

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

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Күн бұрын

In this video, Andy Phillips shows how to test a Mass Air Flow (MAF) Sensor using a multimeter. Knowing how to test this sensor will save you money from buying a new one when you might be able to just clean it.
Below are links to videos that may be helpful:
How To Clean A MAF (Mass Air Flow) Sensor: • How To Clean A MAF (Ma...
How To Test A TPS (Throttle Position) Sensor: • How To Test A Throttle...
Cleaning A Throttle Body: • How To Clean Throttle ...
How To Replace An IAC (Idle Air Control) Valve: • How To Replace Idle Ai...
How To Clean An IAC (Idle Air Control) Valve: • How To Clean Idle Air ...
How To Clean A Variable Valve Timing Solenoid: • How To Clean Variable ...
How To Test An EGR Solenoid: • How To Test EGR Soleno...
Rebuilding An EGR Solenoid: • How To Rebuild & Repai...
How To Replace An EGR Valve: • How To Replace EGR Val...
Installing Inline Fuel Check Valve: • How To Install An Inli...
How To Remove A Valve Cover: • How To Remove A Valve ...
Replacing A Throttle Position Sensor: • How To Replace Throttl...
Replacing Oxygen (O2) Sensors: • How To Replace Oxygen ...
Changing Oil Pressure Sensor Switch: • How To Change Oil Pres...
DISCLAIMER:
The individual featured on the Phillips Vision KZfaq Channel identified as Andrew Phillips, also known as Andy Phillips is not a professional mechanic, contractor or certified repairman. He does not have any formal training in the automotive field, or any other trade. He is strictly a Do It Yourself handyman.
Phillips Vision, or the individuals featured on this channel, assume no liability for anything you choose to do to your vehicles, appliances, games or any other items featured in the videos before, or after watching one of the videos or utilizing the content from this channel.
All Do it Yourself (DIY) repairs or modifications you perform are at your own risk. Proper safety precautions are always needed, and are the responsibility of the viewer to follow. In some cases, even if you perform everything properly, you can destroy or damage one or more things you are working on resulting is costly repairs.
In addition, if for some reason, the instructions on this channel are incorrect, resulting it something becoming damaged, Phillips Vision and those featured on this channel WILL NOT reimburse or pay in any way the costs that may be incurred due to following wrong instructions.
PLEASE DO NOT PERFORM ANYTHING SHOWN ON THIS CHANNEL (PHILLIPS VISION) UNLESS YOU FEEL COMFORTABLE AND CONFIDENT TO DO SO.

Пікірлер: 109

@MuhNeh 3 ай бұрын

Awesome!! finally someone who finds the actual problem instead of just replacing parts!

@jdogali248 2 ай бұрын

Just subscribed. Appreciate actual information on problem solving. Not the typical part cannon mechanic

@PhillipsVision 2 ай бұрын

Thanks for the comment and support

@EnriqueReyesJrREALTOR 4 ай бұрын

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

@americanpatriot5836 29 күн бұрын

Great video

@massoudzadeh3394 5 ай бұрын

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

@Adv207 2 ай бұрын

Excellent information and tutorial, thanks.

@Bigsexy611 2 ай бұрын

I agree finally found a real mechanic

@user-jn7or4ry3p 6 ай бұрын

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

@matthewhomer9369 Ай бұрын

Impressive no guess work I've seen so called mechanics not do those tests and changing buy chance which costs us all .fab guy awesome keep up the good work !!!

@PhillipsVision Ай бұрын

Thanks for the feedback 👍

@olusesanfesobi5219 4 ай бұрын

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

@The1Creston 11 ай бұрын

Thank you for the step by step.

@TheAnthroheart 2 ай бұрын

Thanks for that. Much appreciated.

@alexlang2769 2 ай бұрын

I just tried a web site that for $2 let’s you ask a question of a mechanic so I asked which is the signal wire on a Subaru forester and I got yellow wire pin 5. This info in addition to this excellent video allows me to follow the direction but jump straight to testing…wow this makes it so simple. Thanks for the great video.

@PhillipsVision 2 ай бұрын

👍

@johnnyappleseed6665 18 күн бұрын

what website would that be my friend.. Im trying to teach myself right now and Im kinda stuck

@dinonaccarato2989 3 ай бұрын

Great explanation.

@yousefkhoramdel9964 5 ай бұрын

Hello, Thank you for a good explanation

@Robert-ev5hp 3 ай бұрын

Great explanation

@bicivelo 3 ай бұрын

wow. great video. thank you!!

@luckyajayi2679 8 ай бұрын

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.

@davidessien5465 11 ай бұрын

Great video! ❤

@user-bs9qc6xs7d 2 ай бұрын

I like the machines in the shop. Coin op and slots.

@PhillipsVision 2 ай бұрын

Thanks 👍

@gerhaldlaubscher8321 2 ай бұрын

Great video! I will do the same. See how it works. Thanks

@MinhVo-me5lq Ай бұрын

Very helpful thank you

@bryansmith9384 10 ай бұрын

Awesome video

@masonpugh3637 9 ай бұрын

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

@artsnow8872 Ай бұрын

If you mean that the mechanic stripped some of the wire insulation to make connections with a voltmeter (multimeter); then, you got a poor mechanic. Using backprobe pins is the correct way to proceed to make electrical measurements.

@pekkaT13 8 ай бұрын

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

@yarkie1 Жыл бұрын

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.?

@dineshkrisahnan9929 2 ай бұрын

I AVE MERCEDES BENZ C220 OF 1996 , NOW I AM FACING THE ABOVE PROBLEM, LIKE ENGINE RPM GO VERY HIGH, BUT THERE NO POWER TO PULL THE CAR, ITS STARTED SHOWING THIS PROBLEM RECENTLY, IS IT RELATED TO MASS AIR FLOW SENSER, AND ALSO PETROL CONSUMPTION ALSO INCREASED, ?EXPECTING SOME REPLY FROM YOU,

@kaaraa-mardha1977 3 ай бұрын

Thanks my friend, i enjoyed watching your educational video, except at the point of 6:20 of your video, I'm confused. Where's the ground wire coming from and to where are you connecting to it please?

@PhillipsVision 3 ай бұрын

The black wire on the harness should be your ground. It is at the end of the harness

@elgaragedemel5859 Ай бұрын

Have the same question, thanks for your help.

@nadeemmohammed5182 Ай бұрын

Is it red wire in sensor coupler?@@PhillipsVision

@drakelewton5619 2 жыл бұрын

Andy have a 2011 2.4 Equinox.Codes saying bad intake and exhaust solinod.Rreplaced but still runs rough making sound out of timing chain cover.When unplug solinod intake. sensor helps.Very confused what wrong.

@johncontos9577 2 ай бұрын

Can a good code reader tell the specs in the live sensor reading ?

@amonmusamvu9929 10 ай бұрын

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

@terri4478 8 ай бұрын

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

@birdnestington220 2 ай бұрын

So if the volts go from 1.08 at idle to 0 with acceleration that also means the sensor is bad?

@miker252 29 күн бұрын

Won't the PWM pulse width be difficult to see accurately depending on the scan rate of a digital voltmeter?

@davidessien5465 11 ай бұрын

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?

@erikthered7422 27 күн бұрын

I've always had intermittent issues engine management issues with my 03 Chevy Express. It sat for about 7 years until I recently needed to get it back on the road. It ran fine then it stalled on me and I had a MAF code. I found the tube for the intake popped off the piece that attaches to the throttle body. FFS

@muntherquraishi1267 9 ай бұрын

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

@PhillipsVision 9 ай бұрын

No, only if replacing the SKIM or chipped key.

@davidyj9013 2 ай бұрын

What were the symptoms? Not being an electronics guy I had a hard time following this.

@juggie396 2 жыл бұрын

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

@PhillipsVision 2 жыл бұрын

Yes, but doesn’t sound like the MAF, could be the fuel system or ignition system. Make sure the injectors aren’t clogged or the ignition coils or spark plugs are bad.

@juggie396 2 жыл бұрын

@@PhillipsVision Hi Phillip i check It now I have a U1000 Code on the 2009 Nissan Murano is there anything I can do to fix it Thanks again could one of the sensor be bad

@PhillipsVision 2 жыл бұрын

@@juggie396 this code pertains to a Communication Area Network lost communication. It could be a bad ECU or faulty wiring

@juggie396 2 жыл бұрын

@@PhillipsVision OK Thanks I'll look into it.

@johnmartin7597 4 ай бұрын

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🙏👍

@PhillipsVision 4 ай бұрын

I found online a diagram of which wires were what

@johnmartin7597 4 ай бұрын

@@PhillipsVision thanks my fry. Would it matter if you put the probes on the other way round, or would the value be the same but negative. Thanks again.🙏👍

@PhillipsVision 4 ай бұрын

@@johnmartin7597 I would test them in the proper order to avoid a bad reading.

@mattchew2085 14 күн бұрын

Is it bad that my ground wires on the mass air flow sensor connector are reading 6 ohms ?

@hellospam879879 Жыл бұрын

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

@user-ms8xp4dx2k 7 ай бұрын

Or just unplug if it dies it's good if stays running it's bad

@JO-vf8ql 4 күн бұрын

@@user-ms8xp4dx2k does this work with all maf sensors?

@albiniogonzalezgonzalez6374 5 ай бұрын

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

@mandingo5454 2 ай бұрын

Is the multimeter probe and the copper wire in the same slot for signal?

@PhillipsVision 2 ай бұрын

Yes

@johndiakonis6706 5 ай бұрын

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???

@PhillipsVision 5 ай бұрын

The code you are getting can also pertain to a leak in the intake. Did you check that as well?

@MobyFixer 9 ай бұрын

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

@ericekobor-ackahmochiah9880 6 ай бұрын

Can you reply to this please

@ElleWonderful 6 ай бұрын

Yeah I was wondering the same thing. And agree it's otherwise a good video

@CarlosCastillogearhead 4 ай бұрын

He definitely didn’t explain this well. From my understanding he backprobed the 5V wire and the only wire left after finding 2 grounds, the 12V and the 5V. That wire would’ve been the one all the way to the left if looking at the front of the connector.

@MobyFixer 4 ай бұрын

Thanks Carlos!👍👍@@CarlosCastillogearhead

@jeffreyleedolson7758 3 ай бұрын

He said right in there what wires to probe go back and watch and listen very carefully @4:10/9:05

@lokeshhn1731 2 ай бұрын

5 leads wire among 2 leads input ok..remains 3 leads it will check by multimeter is in it sir 👏

@RobertStorey-ik9bo 2 ай бұрын

Qqqqqqqqzqqs ,z zc

@amonmusamvu9929 10 ай бұрын

Is it showing an engine check

@nathanrice1796 3 ай бұрын

Where do you get the information from about what your MAF sensor's voltage readings should be?

@iulianc9037 3 ай бұрын

Repair manual.

@nathanrice1796 3 ай бұрын

@@iulianc9037 And that repair manual costs how much money?

@dineshkrisahnan9929 3 ай бұрын

THANKS FOR TESTING M.A.F.SENSER, BUT PLEASE MAKE A VIDEO HOW TO REPPLACE THE M.A.F.SENSER, PLEASE,

@PhillipsVision 3 ай бұрын

I do have videos on how to change it but type vehicle do you have?

@esdeynnahernandez4964 5 ай бұрын

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

@PhillipsVision 5 ай бұрын

Could be a faulty IAC (Idle Air Control) Valve, or a dirty throttle body

@esdeynnahernandez4964 5 ай бұрын

@@PhillipsVision how can I check if the IAC is malfuncioning

@PhillipsVision 5 ай бұрын

@@esdeynnahernandez4964 start you car cold, watch the RPMs. If it’s working fine you should hover around 1.5 RPMs and gradually drop to around 600. You can also take it out and visually test it. The plunger will open and close.

@peterlakers1 Ай бұрын

How come you didn't do a before and after test.. That way you could prove that the new sensor works better like what you said that it increases slowly upward...

@albiniogonzalezgonzalez6374 5 ай бұрын

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

@PhillipsVision 5 ай бұрын

I don’t believe there is a specific fuse for the MAF sensor. If you’re not getting power, you may have a break in the wires that need to be replaced. Here is a link to a video I did showing how to find a break in wires: kzfaq.info/get/bejne/bZdkkphorrjbm58.htmlsi=SDTRjuy1pTdckBIc

@user-ms8xp4dx2k 7 ай бұрын

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

@mikethompson3534 2 ай бұрын

Can you try to clean the sensor first?

@jamesrooney7689 8 ай бұрын

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

@PhillipsVision 8 ай бұрын

Are you getting any engine codes? Could be the Idle Air Control Valve or a dirty Throttle Body

@jamesrooney7689 5 ай бұрын

i get po102 and po113 please help could i have a broken wire some where ?? sensor is brand new throttle valve is brand new@@PhillipsVision

@dineshkrisahnan9929 2 ай бұрын

How to clean the MASS AIR FLOW SENSER,CAN YO MAKE A VIDEO ON THAT,

@PhillipsVision 2 ай бұрын

Already did…4 years ago. Here’s the link: kzfaq.info/get/bejne/qKqEismds67Kgmw.htmlsi=Rf2ongwwCRy1Lobk

@zounkou 4 ай бұрын

😊

@tylerkemper2461 Жыл бұрын

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

@donaldwilby266 8 ай бұрын

If the mas is bad here's how.disconnect it while car is running if it shuts off its working if it still runs its bad

@CliffordYawn Жыл бұрын

20 volts dc

@alberto23ad 5 ай бұрын

I have ground in all the cables

@sherwinjames5310 7 ай бұрын

My maf sensor has 8 wire

@DannyBoy1995 4 ай бұрын

Don’t Chevy’s use a frequency style maf. Meaning unless your multimeter if set to frequency (hertz) it’ll just get an average measurement making this test inaccurate

@joeshow8815 6 ай бұрын

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.????

@nadeemmohammed5182 Ай бұрын

He trying to say in one of the comment that black and red probes are at same yellow wire which is pin no 1..

@davidlambert7937 Ай бұрын

What about a car that doesn't run?????

@Bravo_L 2 ай бұрын

at idle? mine wont even start 😂

@MicaiahQuackenbos Ай бұрын

Same deal here

@shark70007000 10 ай бұрын

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.