Thank you for your videos. You have helped me do timing belt,water pump,head gasket and test the MAF sensor on my 2004 vw Passat wagon. 1.8t.

thank you for sharing your reliable information with us , I did not know how to check MAF sensor , now I know thanks to you.

Fantastic explanation. Easy to understand. No unnecessary prattle. I'm inspired to work on my car.

Thank you for these videos you are a great teacher ..

Thanks for a video that didn't have a shop with expensive equipment and tools.

Thanks for this awesome video continue in these episodes we thank you from the bottom of our hearts

Good info, good details. Thanks for posting.

Simplest and most accurate explanation so far.

Simple and straight forward. Love the content

Nice and easy steps to identify the MAF wiring

Wow!!! thanks for all the tips/info... Couldnt have done it without You!! Many thanks,bob

Very nice step by step for beginners with the multimeter like me! Thank you very much!:)

Really useful! Thanks for posting

Thank you for these videos, clear and very good explanation.

thank you for taking the time to make these videos

i really enjoyed watching your videos..i have learned a lot..

Very good explanation, just what i needed. Thanks

very good video, as all you have, keep up the good work, cheers from Ontario ca,

Well explained. Thank you.

I enjoyed watching your videos!

Exceptional video! Explained well without all the extra dribble 99 out of a 100 how to videos have. Maybe you should do a how to video on how to make a how to video, he he.

very well explained. thank you!

Nice, excellent demonstration thanks for the video

Thanks mate 👍🏻 very helpful 👌🏻

GREAT VIDEO MAN, THX A LOT KEEP UP THE GOOD WORK

Great video and explanation!

Your videos are simple to understand and practical as well thanks a lot.

Thank you stay blessed

Your videos are great and well explained. Thank you

Great job. Well done video.

good info as always thanks for sharing.so the idea is to put the voltmeter on the re ferns and censer ground wire to find the movement of tps as voltage changes.

Thanks for making a video, but you might have wanted to point out that this only works with MAF sensors that vary voltage on their output, where most will vary the frequency. The latter you would need an oscilloscope to get a useable reading. So, it would be difficult to know which type you have which would negate the useability of this testing method. My particular MAF sensor varied frequency, and so it just had a constant 2.8v that didn't vary with rpm. The new one was an non-varying 3.1v. Thankfully the new one did fix my problem, but the testing method didn't work in my case.

Best explanation 👌

Thank you for the tips it was very useful, god bless

Simple and easy thanks.

Awesome. Thanks. So now that I know how to test....if I have a new MAF sensor and new wire harness and figured out which wire is the sensor wire, and the sensor wire stays at 10. No fluctuate with throttle. Yes my truck runs like crap. Chevy 2500hd 6.0 gas 2002

Excellent, thanks.

Thank You for the great video and information. That engine compartment looks exactly like mine, 2003 f150 xl 4.2l. If my MAF sensor is bad, How do I remove it from the breather tube? Again Thank You

Thank you this helps me..

Best info... Ever

great video. I am confident I can get this sorted out now. I think the replacement unit they sent me is bad too. Sigh.

Thank you so much!!

thanks man nice job

Awesome dude I have a good knowledge

Good lighting on the Video. Okay Harbor Freight multi meter. I have that one. Good stuff.

I understood it,I liked it

good video amigo exselente. diagnostic

Great explanation carnal, muchas gracias. New subscriber here!

Nice posting sir

Thank you. Very helpful indeed :-)

Loved your video--easy to follow, well done. I have a 2007 Audi a4 2.0. The Air Flow Sensor has only three wires. Which one would be missing?

Thanks !

Brilliant cool dude.

Big help

Hello, there. Great video andn really well explained. I have a w203 c180K 2004, and since last year when starting the car, it started taking longer than usual and the car started to have misfires when in lowgear and it seemed it like it would die... Took it to a mechanic and he disconnected the maf sensor, and the problem stopped "chocking" but the start still takes a long time when i turn the key... I bought a new MAF sensor to replace it, and lo and behold, the problem persisted.... So I so some of your videos of how to test the maf. And guess what i found. On the first step, when looking for the 12v pin (it has 04 pins), i tuned the key on, grounded the multimeter, and set do 20dcv... and guess what i found... 12v on 03 pins and 0v on one... Now, my questions is.... What might be the problem? I live in Brazil, and where i live there aren´t many people that understand how german car works. Got any tips for me? Thanks and looking forward to a reply.

So many thanks.

This was a good video just to understand the basic system and how it works. I am having problem the MAS sensor sending a signal that is two high and the computer switches over to a automatic mode to let the car run but not entirely correctly. The light comes on. Anyway I was wondering that if I am having compatibility issue with aftermarket versus factory bosch sensors and the volvo computer doesn't read the china sensor outputs correctly. I have tried three. Of course they make the factory sensor so freaking expensive. It is almost unaffordable to drive a Volvo and get it repaired. They have everything so controlled and tied to the factory. Anyway. This gave me a better understanding of what is going on and I think I am going to play around with a potentiometer and change the signal to the computer to see if I can trick it into leaving the light off and not throwing a code. Anyway. Its fun trying...

Thank you sir

Good video

U R a Bad Bato my friend! Excelente video and clear understandable explanation and steps! Keep up the excellent videos and thanks a million! Good Brain CACA !

Very helpful. The holes in my wiring harness are too tight to accommodate a nail, and the paper clip ends are too blunt to get in next to the wire. I used a couple sewing pins, which are kind of T-shaped. They're sturdy, yet you can bend them away from each other once the pin end is inserted. I imagine pulled-open safety pins would work, too, or even straight pins. I tried using twist-tie wire, but it was too weak to allow it to be pushed in far enough.

greet job amigo

Cheers mate!

Right on!

Hi, and thank you for the information. Question. My check engine light is on. The code reader shows P0102 which is the MAFS voltage low. There is no vacuum leak. Does this mean that my MAFS is bad because if I test the MAFS installed as you showed we already know that it is going to be low based on the code.

Love you

silly question, what if you test ohm resistance probe to constant voltage supply any damage to wiring harness?

So useful but from where you know how much is a value for each of sensors.

good video, my maf’s got 8 pins so, so much for that process of deduction to figure out wats the sensor ground. speaking there-of, what’s the difference between constant ground & sensor ground?🤔

I know it's an old video, but you have maf signal wire and the other is the reference voltage and not the signal ground if I am not mistaken.

When backprobing the signal wires, did you connect the plug back to the MAF sensor?

Make sure you don’t ground out the + wire. Also keep in mind you can create false codes by disconnecting sensors with the key ON. Don’t throw parts at ghost codes you created yourself (or others created). Hence the importance of erasing codes and and seeing if they still persist. That’s why scanners with LIVE DATA can have advantages. Also you don’t want to trigger a “Limp Home” mode with decreased performance from triggering “False Codes.”

That was usefull

Question @ 2:18 turing on the the ignition will send power to the sensor via 2 wires?

Question; in this case, would it really matter which of the ground wires you used in the testing? They are both constant grounds here, are they not? Or battery negative for that matter? When testing the voltage from the signal wire I mean :)

Hey brother good job, but what about when you have 5 wires instead of 4,what the fifth wire will be for? Thanks again for sharing your knowledge 👍👍👍

Good shit thx

What was the wires that the paper clips was connected to? Voltage and ground?

What if the spark is checked good and the fuel rail pressure is good but will not start when cranked? Will any test on the MAF show any information if the car will not start? Thank you for your efforts, been watching many years.

on my explorer 92, i get code 157,158, low and high voltage codes, check engine light on , I get .01 . check engine light off i get .53 . it is an intermittent thing. checked wires for shorts, none, runs crappy at idle and when driving it will stumble slightly right before check engine light comes back on. I can also unplug maf and plug back in check engine light goes off. yes I cleaned contacts just to make sure it wasn't a short at plug. my question is, would this indicate a faulty maf or one thats getting ready to completely fail?

Can you test the MAS if your truck won't stay running. And can a bad MAS cause it not to start or to die within a few seconds or cause surging when idling

I have a question, I have a 2001 tundra and it stalls in drive & reverse

Fab, however would you not get an engine warning light come on when you disconnected the MAF sensor then turned the ignition on ..

request, if you can show how to test electronic power steering wiring without scanner, thanx

Hi, I am in the process of repairing the mass air flow sensor connector wiring. As a result of the mice messing around, I cut the wires off the connector side, leaving approximately two inches for each wire attached to the connector. I thought each wire was a different color, but I was surprised to find two wires of the same color. I drive a 2006 Infiniti M35 with a maf sensor that has 5 wires in this order from left to right: red, black/white, white, yellow/green, black/white, so I connected the 3 different colored wires and was left confused about the two Of the same color. I tried connecting this to this and vice versa and I did not feel any difference. I also tested them with a multimeter and they both gave the same measurement. So if you have any idea or suggestion that can help, will be appreciated

I was doing maf sensor test on lexus is220d.I had ignition switch on position but engine was not running. I have found 12v wire 5v wire connections.I tried to start the engine know all light come on dash but car is not cranking. before the engine was running. Can you tell what might gone wrong.

What does is mean if the voltage doesn't go up while revving engine. Or very low reading on idle

Dude, your KZfaq thumbnail shows a VW MAS. What the crud man. That is not a Vdub. I have been Hood-winked. Bam-Bo-Zeled. Lead ash-tray. TDI Love from Chicago...

As a newbie , i need to ask do you keep ignition on for resistance test?

what would happen if your had accidently probed the hotwire when you were checking the resistance? Can it damage the ecu?

You have any videos with a 5 pin maf sensor

Hello men great I have at problem I Tex and everything is look okay but the car keep the same I but mass flow sensor in eBay you think this is the problem because I install the old one and star find and 5 10 minute show off let me know please thanks

I am trying to locate the r camshaft position sensors on 2011 Range Rover sports?

i have a 97 gmc pickup, 5.7 had the code for MAF low voltage come up. seems to run alright. when i did the test on the sensor i get my 12 volts, good ground, at idle i get 4.48 volts, but when i accelerate the volts go down instead of up, they go down smoothly as the the RPMs go up , any reason? any suggestions??

Does this really help diagnosing a bad map sensor? What if map sensor had a bad calibration?

Sir you have example of how to test the electronic egr

in my opel astra h 1.3 cdti const is about 5v (MAF and MAP sensors) is that normal ?? my car cant use all power ://

I may try this with some wire running back to the car interior so I can get MAF readings with the car in motion.

My 2000 ranger 4.0 ohv reads about 1.1-1.0 on start up and settles down to about .8 is that normal or is that too low?

whats the trackname at the end of the video