HOW TO KNOW IF MAF SENSOR IS BAD. MASS AIR FLOW SENSOR TEST

HOW TO KNOW IF MAF SENSOR IS BAD. MASS AIR FLOW SENSOR TEST

Engine light is often triggered by bad or dirty MAF sensor also known as Mass Air Flow Sensor. In this video we will demonstrated how we tested the MAF sensor on this BMW to see if it is good or bad. Bad sensor will not be responsive, dirty sensor will have limited or slow responsiveness.
We demonstrated how to test the MAF on this BMW but the procedure will apply to most modern cars with OBD connection.

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We, Auto Repair Guys, are not responsible for property damage or injury incurred as a result of any of the information contained in this video. Information given in this video does not guarantee the desired outcome. Any injury, damage or loss that may result from improper use of the tools, equipment, or the information contained in this video is the sole responsibility of the user and not Auto Repair Guys.

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[ryans]

I just want everyone to know if you pull out your sensor and it looks clean don’t take it as it’s fine. Mine was bad and I used mass air flow cleaned sprayed it little dirt cam off plugged it back in and the car worked great. These sensor are supper sensitive

[rickardomoses]

thank you very much you are a fantastic teacher..I am a first time learner and fixed my BMW 320D 2010 modle all with just watching your vedios. the mechanics wanted 6k to fix my car .. i did it with less than a thousand dollars..

[P-FIVE-ONE]

With the engine off does the MAF give a read out? when my engine is off its at 0.0, my dads car reads 0.6 with the engine off. so wondering if there is an issues?

[karlolafvarik]

my e60 535d shows 60kg/hr on idle seems a little too high. also if i disconnect the egr vacuum the throttle response is better are these two connected?

[josepeixoto]

Good info, and yeah, but still it can be a number of things, not that simple; if the EGR is acting up, the intake air dilution is upset and the maf gives bad readings; same if there are problems in the wiring or in the connectors; seen LOTS of MAFs changed with new ones, and, the problem remained until the bad connections were fixed

[talhaiftikharchannel]

In civic 10 gen, on idle, sensor reading starts fine, but then car rpm fluctuates and maf readings goes high on idle,
Also experiencing jerks on accelerating from zero and stalling stalling on low rpm, is it maf culprit?

[dzwonik]

Thanks mate i found it. its a maf sensor caused higher fuel consumption! You are the best G!

[walther]

mine at idle fluctuates 12-16 and give a gas fast about 5k rpm it shows 330 kg/h it broken then ?

[shark]

I don't have a code for MAF, but this 2005 Nissan Altima is only showing 0.01 to 0.16 lb/s. It starts cold, runs up in RPM's, but as you drive it, it looses power and slows down, almost to a stop. But I have no codes for the MAF.

[vjxpiroevo]

I have my truck with p0102 MAF sensor, but when I put the scanner
Maf graphics won't move only said
0.20lb

[matt-matt]

My 120d is showing 50 kg/h at idle . This is a stage 1 and i dont know what it showed before that. Is this normal?

[Therey]

You should make videos using that scanner on bmw for different things i have the same one but i only use it for codes

[nilhansilva]

Whata the correct value in 4 cylinder engine air flow sensor in g/s.

[stonesthrow]

If you buy a new MAF...you MUST get a VDO or Seimens brand. Any other cheap knockoff version will give you bad readings. I purchased a replacement MAF sensor from Autozone, yes.... I know better, but I just wanted to try it out. Sure enough, the kg/h was reading 16 at idle. I noticed yours is reading 12.5 or 13kg/h at idle. So my X5 has the 3.0 Litre M54 motor. I have NO vacuum leaks whatsoever and have installed an oil catch can with a new PCV valve. It runs great when you are cruising around, but after warming up and sitting at idle..this DuraCRAP Sensor from Autozone reads that there is much more air coming in than what is actual.
If you buy a new MAF...you MUST get a VDO or Seimens brand. Any other cheap knockoff version will give you bad readings.

[djevelyn]

My value is 16 kg/h at idle. On a grand vitara 2007. Does this look ok?

[harpindersingh]

At idle my n52 shows aroudn 21-22 kg/h. So is it ok or it’s faulty?

[HendraGunawan-gbpz]

Sir..., This test with air conditioner on or off ?

[MohamedTarek-qmvf]

I have BMW f30 N20 and I want to check is my maf is bad, when I unplug it while it’s running should it stop or continue running ?

[philojalvo]

after replacement, do i need to reset the new sensor in my 2013 335i ? or will the car automatically detect that the faults have been corrected?