DIY - 5 Symptoms of a Failing MAF (Mass Air Flow) Sensor!

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In today’s video, Zach goes in-depth on the Mass Air Flow (MAF) Sensor, a critical yet often misunderstood component in modern vehicles. Understanding the function and importance of the MAF sensor is crucial for maintaining your car's health and performance. Zach dives into what a MAF sensor does, its purpose in your vehicle's engine management system, and the five key symptoms that indicate it may be failing. Whether you're an auto enthusiast, a seasoned mechanic, or simply a curious car owner, this guide is packed with valuable information to help you diagnose and address MAF sensor issues effectively.
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00:12 - What is a MAF Sensor and What is it’s Purpose?
00:58 - Signs & Symptoms of a Bad or Failing Mass Airflow Sensor
01:04 - Symptom #1 of a Bad MAF Sensor - Check Engine Light & Fault Codes
01:30 - Common MAF Sensor Fault Codes
01:56 - Symptom #1 of a Bad MAF Sensor - Check Engine Light & Fault Codes (Cont.)
02:38 - Symptom #2 of a Failing MAF Sensor - Engine Hesitation & More
03:38 - Symptom #3 of a Failing Mass Airflow Sensor - Hard Starts & Engine Stalling
04:41 - Symptom #4 of a Bad Mass Airflow Sensor - Rough Idle
05:36 - Symptom #5 of a Bad Mass Airflow Sensor - Lean or Rich Air-To-Fuel Ratios
06:41 - How to Diagnose & Fix a Bad or Failing MAF Sensor

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1 июл 2024

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Комментарии : 159

@bootsseymour5384 Месяц назад

Now this is an educational video. Thank-you sir

@8020Media 26 дней назад

B - Thanks for the feedback! Glad we could help.

@ben2252 5 месяцев назад

Good explanation and thank you for sharing.

@8020Media 5 месяцев назад

Ben - Thanks for the feedback! We hope it helped.

@ben2252 5 месяцев назад

@@8020Mediayes and very much.

@francfurian8215 5 месяцев назад

Thanjs for that in-depth exploration . Cheers😊

@8020Media 5 месяцев назад

Glad you found it useful!

@Blu-Man 3 месяца назад

@@8020Mediasuperb explanation

@8020Media 3 месяца назад

Blu - Thanks for the feedback!

@vilaskrueger-gx7hf Месяц назад

Cars were so much better before all this sensor and computer junk ..years ago cars ran forever without problems .

@8020Media Месяц назад

V - Couldn't agree more!

@cumminspower Месяц назад

⁠exactly! All in the plans….planned obsolescence…..

@johnathanwroe2148 Месяц назад

Same with mercury bubble thermostat switches, console televisions, washers and dryers, etc.

@garylivingston9052 Месяц назад

Amen brother! cars suck today thanks to the government requiring all these senseless things that cost the consumers $$$$

@johnathanwroe2148 Месяц назад

@@garylivingston9052 that factors down to: government sucks

@SefakoMakgoba-zl7zw 4 дня назад

I feel like I have to pay for this MAF1001 Module, thank you sir.

@8020Media 4 дня назад

S - We hope it helps! Thanks for the feedback.

@bigvinny333 Месяц назад

Rough idle on VW petrol cars is often due to blocked throttle body butterfly valves. The half moon spaces around the valve allow sufficient air into the fuel injection system for idle unless they are gunked up with oily deposits from the gas recirculation system. As soon as the throttle is pressed the valve opens and the car runs normally. The deposits are easily removed with engine degreasant say every 40k miles.

@8020Media Месяц назад

B - Very true, thanks for sharing this insight!

@MisterWoes 2 месяца назад

Great video! I cleaned the MAF, replaced the filter, even cleaned up the tb plate a little and hard reset the ECU. All was well until half way through the next day. Engine light returned, obd2 read out rich fuel ratio. Getting some juttering when stopped at a light. Could it be o2 sensor related? I ruled out spark plugs because after the cleaning and reset, the vehicle starts up faster then my other vehicle with ngk iridium ix plugs! Could be wrong of course.Thoughts are appreciated! Again, thank you for the video! 2014 Chevy Captiva Sport 2.4 4l eco e85 capable version in Tx.

@8020Media 2 месяца назад

A - We think this video may be helpful in your research: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-U3JVc3VLahA.html

@dht084 21 день назад

Bad ecu maybe

@keithhall2943 7 дней назад

Thanks a ton😊

@8020Media 5 дней назад

K - Thanks for the feedback. We hope it was helpful!

@sanfordnickerson5465 4 месяца назад

Thanks for the input got a few of these symptoms with my 01 pontiac grand am seems like it could be the culprit

@8020Media 4 месяца назад

Sanford - Keep us updated. We hope this video helps!

@sanfordnickerson5465 4 месяца назад

@8020Media so just replaced the maf sensor and still sputtering is there another sensor that I'm missing

@8020Media 4 месяца назад

S - Do you have any engine codes?

@sanfordnickerson5465 4 месяца назад

@8020Media no codes just sputtering around 45-55 mph until I open it up look up that it could be a fuel pressure regulator ya?

@8020Media 4 месяца назад

S - It certainly could be! Given it sputtering, this could also be a fueling related issue.

@vinodhnb4u1 5 месяцев назад

Good explaination, can be more effective with demos!

@8020Media 5 месяцев назад

Vinod - Thanks for the feedback and how we can improve the viewing experience! Great idea.

@shantygarcia2295 7 дней назад

I’m having these symptoms issues with my car and when I put gas in my car it stutters to turn on and have to press on the gas to fully get it to start could you lmk what you think?

@alexatwood6205 2 месяца назад

Having issues on my wife’s car. It’s push to start and normally starts right away lately has been taking a little longer to start and when it did had a rough idle. It didn’t happen every time, Then about a week after this happening it threw a P2188 code. Gonna clean it this week and hopefully that will fix it if not I’ll replace it since it’s cheap if that doesn’t fix it mechanic it is 😢

@8020Media 2 месяца назад

A - We also have a video on hard starts that may be useful in your research. However, since you received the P2188 code, that should point you in the right direction. Keep us updated! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0YRdzJbHcm4.html

@scottg9159 Месяц назад

I wish I saw this video earlier! I have so many questions of what to do now

@8020Media 26 дней назад

S - What's going on?

@scottg9159 26 дней назад

@@8020Media my cruise thru code for air fuel issues and then for the down stream 02 . So I changed the 02 and car wouldn’t go over maybe 15 mph . So they the mechanics told me to clean the throttle body and never got it started after that. Now it’s in the shop with a b101e code and I’m getting charged 300 to clear that code. But car still won’t even run for more than a few seconds. I’ve never had problems with it in the past

@8020Media 21 день назад

S - Keep us updated on this..

@scottg9159 21 день назад

@@8020Media they changed the spark plugs, cleaned the mass airflow sensor change the knock sensor and now it just needs a catalytic converter and the car will be running. So basically I bought defective spark plugs from advanced auto because all kinds of issues with emissions and unburnt gas going into the cat and caused the computer to go into safe mode and throw the b101e code.

@8020Media 21 день назад

S - Glad to hear it has been resolved. Thanks for sharing your experience!

@carelwentzel2030 Месяц назад

A propper gas anilizer can pickup fuel mixure aswell.

@8020Media Месяц назад

C - Thanks for sharing this insight.

@alfi110 2 месяца назад

My Fiat Stilo 1.9 jtd began to accelerate more slowly, but only until the mode when the turbocompressor starts working, up to 1700 - 1800 rpm, then it pulls like a "beast". Are these symptoms indicative of a bad MAF? I'll try turning the MAF off and see the result.

@8020Media 2 месяца назад

A - We have a video covering this that may be helpful: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ipjYLPJgpq8.html

@dennisbrantley6925 21 день назад

Other sensors that give the same symptoms other than mass air flow are bad o2 sensor, temp sensor, and idle air control valve. All deal with fuel mixture. Other things to be aware of include, stopped up air and fuel filters and of course plugs, wires, rottery button, and distributor cap.

@8020Media 21 день назад

D - Very true. Thanks for the added insight here.

@laflare5596 3 месяца назад

My 2013 nissan altima has this code and it went away and it turned back on but i cleaned it and code came up .. so when i turn it on sometimes it turns on completely for like 3 seconds then turns off but sometimes… and when it doesn’t do that it start on and runs good just with check engine light on im going to try it and buy a new one ..

@8020Media 3 месяца назад

L - Keep us updated.

@ShawnStafford-1978 Месяц назад

Think it also depends on what vehicle, the wiring system, and computer. I thought my TPS was bad. Replaced it still didn't help. I replaced my once already replaced MAF from a decade ago which solved the problem. Plus my car is from 89

@8020Media Месяц назад

S - Thanks for sharing your experience.

@ShawnStafford-1978 Месяц назад

@@8020Media You're welcome. Thanks for the information

@susanlynn6545 6 дней назад

My buick lesabre shakes / vibrates hard and has trouble accelerating at 45 - 55 mph. Driving faster or slower is fine. Any ideas why ??❤

@8020Media 5 дней назад

S - We have some videos that may be useful here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-BiYsqRJCLhE.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ipjYLPJgpq8.html

@phoeveezy6398 22 дня назад

Im having all these issues you’ve mentioned intermittently, like sometimes the car will run fine but others it’ll have all the problems you’re mentioning. but im getting p0492 codes (air pump) but my air pump is working fine. Also when the car is running ill unplug the maf sensor and the engine will hesitate but it will keep running. Does it still sound like the maf is the culprit?

@bevclicksy3523 21 день назад

I was told if it still runs when it's disconnected it's a bad maf. It should cut out. I'm having loads of issues with my audi tt. Mine still runs but runs better without it connected. So I've just ordered one. Wish me luck lol

@8020Media 21 день назад

P - It certainly could be. What vehicle do you have?

@phoeveezy6398 20 дней назад

2001 bmw 330i

@8020Media 20 дней назад

B - Keep us updated!

@8020Media 20 дней назад

P - Could certainly be the MAF. Have you pulled it to see if it could be clogged?

@deeowen5176 4 месяца назад

I have a 09 kia optima and my car starts and shuts off with in 10 seconds. In park i can hit the gas and ut stays on but when i stop it shuts off i cant even drive out the drive way could mas help that thanks

@8020Media 4 месяца назад

D - This sounds like your engine is stalling. We have made a video specifically for this issue: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-7bqAIbYRdnc.html

@MichaelWysocki-ks5xt 25 дней назад

Is exhaust flowing?

@nickseguine393 13 дней назад

will these codes for the maf come up on obd1 also?

@johnsmith7676 11 дней назад

No.

@breesimmons923 2 месяца назад

2004 Lincoln LS MAF issues when it’s connected the car will not start completely but once disconnected car runs but idles roughly. Replaced the sensor with brand new one and still does the same thing. Engine code reads the same not sure where to go from here I need help asap !! What would be the next step?

@breesimmons923 2 месяца назад

I believe it’s between 3-4 issues

@8020Media 2 месяца назад

B - What engine codes are you getting?

@Michael-jv2cn 18 дней назад

My code say's it's the Mass air flow P0101. I cleaned it and then cleaned filter and then just changed out the sensor. But the engine light is still coming on with that code.

@8020Media 17 дней назад

M - Give it a little bit, unless you have a way to clear the codes. Is it riding better?

@lazaerll7300 2 месяца назад

can I test my maf sensor by the resistance of the sensor with a multimeter?

@8020Media 2 месяца назад

L - This is possible. Many DIYs online.

@erikmontes6791 Месяц назад

I got code p0106 and it stalls bad idle like rough and esc traction light comes on and off any help ??

@8020Media Месяц назад

E - This could be related to your MAP sensor: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-F0DXflK7ADo.html

@premiereteamlacrosse1633 3 месяца назад

My Mini Cooper is displaying “Engine Malfunction…Reduced Power”. Do you also think that terrible fuel economy is also one of the symptoms?

@8020Media 3 месяца назад

It certainly could be. The most important first step is to get a code reader and scan the codes, can't really point you in the right direction without knowing what codes you are throwing.

@premiereteamlacrosse1633 3 месяца назад

@@8020MediaI don’t have a scanner. Will have to get one. I also noticed that the cold start takes a second or so longer to start.

@8020Media 3 месяца назад

P - Here's a video that may be helpful: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0YRdzJbHcm4.html

@premiereteamlacrosse1633 3 месяца назад

@@8020Media Thank you for recommending this video. Was great!

@8020Media 2 месяца назад

P - We hope it helps!

@wicked5312 4 месяца назад

Going to replace my MAF, I’m thinking That’s my problem Because I had a lean code p0171 & P0174 Already changed my fuel filter and pump I have fuel pressure but My fuel trims are very high In Key on engine off Hopefully it fixes this issue, the truck won’t start but it sounds like it will it just sputters and shuts off

@8020Media 4 месяца назад

W - Keep us updated. This video of ours might be helpful with diagnosing as well: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0YRdzJbHcm4.html

@wicked5312 4 месяца назад

@@8020Media good videos, I just subbed and yea I’ll Comment once I Get it diagnosed

@8020Media 4 месяца назад

W - Thanks for the feedback!

@whlawson5812 2 месяца назад

I bought a dash board mounted OBD2. It can read out many parameters like throttle body % opening, MAP, MAF, low & high fuel trim, RPM, IAT, O2 reading, battery voltage etc etc. For a 2 litre car engine it's MAF should be reading air flow of around 5g/second at idling RPM with air cond off vs manifold pressure at -7.3psi Setting the car on auto cruise mode and keeping the car's engine at 2000rpm the MAF should be reading around 45g/second when MAP (air manifold pressure) at +7.35psi vs MAF 30g/second at 0psi by MAP. On the dashboard OBD2 show be recorded using a mounted hand phone so that both hands are in the steering wheel. Be safe. Broken vacuum hose or even a slightly loose air clamp can cause atmospheric air to leak into negative pressure side of the manifold and drop MAF reading during idling. Throttle valve body opening will easily drop from 15% open to 13% or less.

@8020Media 2 месяца назад

W - Great insights here. Thanks for sharing.

@user-du2fq3pi1p Месяц назад

I changed everything in my truck to stop the missing popping an staling out then I unplugged my mass air flow sensor an it ran great it misses every now an then but it runs great and I also smell antifreeze but no leak ??????? 8:47

@8020Media Месяц назад

B - Is the MAF blocked?

@user-du2fq3pi1p Месяц назад

No it's not blocked

@user-du2fq3pi1p Месяц назад

It's unplugged now and it runs great I've had 3 on it

@kellismith4329 27 дней назад

@@user-du2fq3pi1p it’s running on a predetermined air fuel ratio with the sensor disconnected, you likely have a fuel delivery issue (pump, injector spider etc)

@palerider6099 Месяц назад

Code po175 fordf150 should i replace sensor

@8020Media Месяц назад

D - You can try cleaning the MAF sensor to see if it works. Keep us updated.

@pa.fishpreacher6166 2 месяца назад

Could it still be bad if there is no light on or no code

@8020Media 2 месяца назад

P - It can certainly be clogged.

@terrybride-bk3gi 2 месяца назад

Can I buy the bolts for the MAF Sensor on 2016 Mini Cooper

@8020Media Месяц назад

T - You can test some at your hardware store. It's probably not something the dealership or aftermarket dealers sell.

@contactpq Месяц назад

BMWs are really bad for throwing all those codes when there is a vaccum leak from any of it's plastic vaccum related parts

@8020Media Месяц назад

C - True.

@DoubleDsp 3 месяца назад

Will a bad mas throw a code?

@8020Media 3 месяца назад

D - yes, more than likely.

@Devilcity6275 2 месяца назад

All”P” codes.

@8020Media 2 месяца назад

D - No. We mention this in the video... Around 01:30

@vincentwright7236 26 дней назад

How do i get rid of a p0103 code "a" high curcuit?

@8020Media 26 дней назад

V - Try cleaning your MAF sensor. Keep us updated.

@vincentwright7236 26 дней назад

Okay

@vincentwright7236 26 дней назад

I can use alcohol right?

@8020Media 21 день назад

V - Yes.

@moe3645 5 месяцев назад

Let’s gooo

@8020Media 5 месяцев назад

Moe - Thanks for the continued support.

@itsurboiijr6961 Месяц назад

Could it be my throttle position sensor because it idles and shakes , it sounds like it wants to cut off like it has a cam on it,

@8020Media Месяц назад

Have you checked the cam position sensor? But yeah could be TPS too which I think we also have a video on

@Onyok.Bentot Месяц назад

Hi! I’m thinking of getting a preowned full-sized pickup truck as daily work truck. I have a commute of 40 mile one-way (1.5 hrs) then another 1hr drive home in horrid SoCal traffic. I haul mostly network cabling installation equipment in the bed, and do not tow. What brand, model year, engine and grade do you recommend? I would like to have some of the newer active safety features such as the automatic emergency braking system to avoid front collisions, but not as critical as long-term reliability and durability. Any suggestions for a late model pickup truck with Direct and Port Injection. Also, what immediate and affordable engine and transmission mods for reliability and durability do you recommend to protect the powertrain? I’m not looking for more power, just long-term reliability and durability as I don’t have too much money and need a truck for work and personal use. Thank you!

@8020Media Месяц назад

The biggest question is what is your budget. Long term durability I'd say avoid GM right now - their AFM/DFM technology is wack. Ford's 5.0 Coyote is a solid motor going to be lower maintenance than their EcoBoost engines. And Ram's Hemi engines are tried and true.

@Onyok.Bentot 29 дней назад

@@8020Media Thank you for your responding and for your advice! I appreciate your advice and help.

@8020Media 21 день назад

O - No problem! Glad we could help.

@Eli-lx2fq Месяц назад

I disconnected the maf on 2015 f250diesel , nothing happened.😂😂😂❤

@8020Media Месяц назад

E - Strange, but thanks for sharing your experience.

@alfi110 2 месяца назад

MAF disconnected, different story. Accelerate much better at low RPM (1000 - 1700 O/min - before compressor stars "pumping" air to manifold).

@8020Media 2 месяца назад

A - Thanks for sharing your experience.

@MrKmbcd320 Месяц назад

Will a bad maf.sensor cause car to move lazy up hill

@8020Media Месяц назад

K - It's possible.

@LondonG0708 19 дней назад

I have po240

@8020Media 19 дней назад

G - This video may be helpful for you: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-dD5FaqKNuA8.html

@chico711 Месяц назад

Can maf sensor be cleaned with alcohol,,,?

@8020Media Месяц назад

C - I mean, I suppose.. But would probably consider something else?

@chico711 Месяц назад

@@8020Media contact cleaner……..???the reason i am asking is coz we don’t have maf cleaner where i live ….;)

@8020Media Месяц назад

C - You can order it online. We have a link in the description.

@speedracer2831 13 дней назад

@chico711 they are VERY fragile. Better to order MAF cleaner.

@8020Media 4 дня назад

S - Agreed.

@Orokusaki22 2 месяца назад

After I start the car, it works normally, but when I try to give gas or let go of the clutch, the car stalls and the revs drop, please help me

@8020Media 2 месяца назад

Sounds like it's probably a fueling problem so I'd start there. Or something like a camshaft position sensor. Start with reading your engine codes.

@Orokusaki22 2 месяца назад

@@8020Media sorry, but how to read odes

@8020Media 2 месяца назад

O - You need a OBD2 scanner.

@pissedoffamerican4869 Месяц назад

COMPUTERIZED BEER CANS WITH AIRBAGS & WHEEL'S!!!!!!!!

@8020Media Месяц назад

P - Lol.

@juanzavaleta1488 2 месяца назад

you talk to mich

@8020Media 2 месяца назад

J - Thanks for the insightful feedback.

@Yudahyahsharell 2 месяца назад

You have to talk in order to explain, obviously you’re not a mechanic or you would understand that the more you explain the better the understanding. If you’re unhappy with the presentation no problem but why insult someone for trying to help for free?

@8020Media 2 месяца назад

Y - Thanks for the feedback!