Mastering MAF Sensors: Decoding P0101 & P0102 Codes!

Difficulty starting, engine hesitation, stalling and fault codes P0100, P0101, P0102, P0103 and P0104 can really ruin your day. But what’s the best practice in diagnosing these failures?
Tim’s here with an insightful tutorial, to discover the essential steps to effectively test a Mass Air Flow (MAF) sensor in your vehicle. Our step-by-step guide takes you through the process, providing clear instructions and pro tips to ensure accurate testing. Learn how to diagnose potential issues, interpret test results, and make informed decisions for optimal engine performance.
link.ecutesting.com/MAF
0:00 - Episode insight
0:51 - What is a MAF sensor?
3:02 - Causes of a bad MAF
3:54 - Check MAF sensor
5:21 - How to clean MAF sensor
6:08 - P0100-P0104 Fault codes explained
6:48 - Test MAF sensor wiring
7:39 - Diagnose P0103 code
8:48 - Diagnose P0102 code
9:49 - Fix P0100 code

[@Ecutestinglimited]

- Tested your MAF and found the wiring is faulty? 🔍 Learn how to repair your loom here: 🛠🔗 kzbin.info/www/bejne/iWmqfWuMeMxqeZosi=RU9jNjPlao3qxb5t - Think it’s your ECU? 💭 Click here to get it re-built: 🛠🔗 link.ecutesting.com/MAFPI

[@adrianstanton2652]

I had this problem. Cost me a pretty penny. I could have used this a few months back. Thank you for the information. Keep up the work.

[@blaz1235]

Very good explanation, Thank you 👍

[@uchihaevo19]

I'm very happy that discovered your channel🙏💚

[@Savage-lx5yj]

Excellent sir! Thanks

[@joonkt3483]

Subscribed! Thanks!

[@jaseralomary8854]

Dear many thanks very useful vedio

[@sahancrpan3539]

Thank you very much for your valuable information. Greetings from Turkey.

[@xllitee]

damn this was a nice good video! more of these for all the sensors please!

[@Ecutestinglimited]

Thank you! We will be creating more videos on sensors in the future so stay tuned 👍

[@nyachubadick5287]

Wow your work is really amazing ❤

[@Ecutestinglimited]

Thank you very much! 👍

[@MeargGebreslassie-iw5dg]

love your edtiting

[@jscons7424]

Thanks buddy

[@georgedawson235]

I feel so lucky to be a garage owner with ECU testing on my door step And a thankyou to the team for a recent speedy mechatronics repair and handy bit of customer service when I had a query post fitting!

[@Ecutestinglimited]

Hi. Thank you for the kind words, we're glad we could help you get back on the road 👍

[@figgiefigueroa7372]

Amazing channel 👍👏👏 love it!!! So simple i can do it. No more dealership 600 dollars Bill's.

[@RoryTobias_]

GREAT VIDEO! i keep getting a gearbox valve malfunction (electrical short) - not sure where to start -DSG 2.0 GTI

[@dinonaccarato2989]

I totally loved your video!! You’re thorough and brilliant. I just need you to. Slow down lol. You know what you’re doing so well that it pours out lol. Thanks so much , going home to try your advice. Cheers Dino

[@Ecutestinglimited]

Thanks! Sorry for the rapid fire info, but we hope the video helps you out! 🙏

[@wannaPreG]

Some of us admire the rapid fire info… hahahha

[@ahmedhmd7062]

Tank you

[@tiperrsix8440]

terbaik bro

[@rohollah3880]

perfekt 😊

[@user-vi4ub8xm6z]

I want to know how the ecu functions with the trotter relay, i mean how they do transition of electrical (intersection of wires)

[@paulfritz4249]

I have a ST 2.5 ford focus it got a circuit A high voltage fault P 0103 i did test my wiring with the multimeter and my 12v. from the fuse box is right then if I test the wiring the negative ,signal I also get 12v but if I remove the connector plug with the engine running the 12v falls away on all of them axcept on the 12v from the fuse box so to me it looks if the mass airflow is at fault but iam not sure what must the voltage be .The ford focus st 2.5 wiring diagram does not show me on the wiring diagram what colour is signal 5volt or negative .

[@user-vi4ub8xm6z]

My infiniti fx35 2010 model don't accelerate after changing ecu, maf airflow, crank and camshaft sensor including trotter, an ensure the engine timing still not accelerate, so please help me to the solution of fult

[@MeargGebreslassie-iw5dg]

can you work more videos on Toyota Hilux, Yaris and also v8 Landcruiser engines

[@user-vj2wt7jh7j]

I was curious I have a 2013 Subaru WRX STI which gives me intermittent problems mainly misfires and multiple random error codes although no Mass air sensor codes but still wondering if I have some weird mass air flow sensor intermittent problem. I need to change and check the spark plugs which is a pain in the butt on a Subaru. If that doesn't fix it I have an ECM ready to replace my current ECM which I am suspicious of with the random error codes.

[@Ecutestinglimited]

Hi. Sounds like a good diagnostic process, checking if the MAF sensor is clean is always a quick and easy fix when dealing with misfires. Hopefully you find the cause of your faults soon!🙏

[@user-vj2wt7jh7j]

Yes, I already cleaned my mass air sensor. I need to change my plugs but I suspect it is the ECU with all the erratic error codes. The ECU is under my passenger side carpet, but the biggest problem is unlinking my Cobb tuner from the current ECU and programming my new-used ECU it says 2013 WRX STI on my eBay replacement ECU but hopefully, it is truly compatible. I don't know if it is from the automatic transmission version or even if that truly matters? Cobb told me that ECUs from several years should work with my car hopefully, it truly works. I may have damaged my ECU during COVID when the car sat for a prolonged period with a dome light on and the Optima battery went dead, and I had to try multiple tricks to try to recharge it without success. I'm not looking forward to changing the sparkplugs on that car, though. Not much clearance and a lot to disassemble to get to the plugs. I have changed cam timing belts that were actually easier, particularly on simple 4-cylinder motors.@@Ecutestinglimited

[@guanedits6349]

​@@user-vj2wt7jh7jDid you fix the issue?

[@user-vj2wt7jh7j]

@@guanedits6349 Possibly, out of desperation, I put in a bunch of fuel system cleaners, and so far, it seems to be running better, but I haven't driven it a lot. I have leukemia and don't get out much. I have found that intermittent problems seem to be the hardest to diagnose!

[@86abelgomez]

Can a faulty throttle body cause a maf sensor p0101 code? Seperate code p0300 multiple misfire.

[@Ecutestinglimited]

Hi. A dirty or faulty throttle body can sometimes be the cause of a P0101 fault code, however we would still recommend completing the checks in this video to rule out a fault with the MAF sensor or its circuit first as this is the more likely cause.

[@ahmedanwar2055]

I need help in transmission software seat leon mk3

[@Ecutestinglimited]

Hi. Please email our technical support team at [e-mail] with the following details. Your make and model of vehicle, the part number of your unit, any symptoms of the fault including fault codes, and any fixes you have attempted. They will be able to advise you further. Thanks.

[@davidmpane4324]

Hi, I'm on a 2003 VW Passat 1.8t and the fault code I get is P1479 please advise

[@Ecutestinglimited]

Hi. The P1479 fault code usually indicates a problem with the brake booster system on Volkswagen vehicles. We would recommend checking vacuum lines, hoses, and connections for any signs of damage, leaks, or disconnections.

[@konstantin-big]

Maybe the brake pedal is tough????

[@ampadujoseph3848]

I want to learn how to hacking matiz ecm and other car am in automotive field

[@uchihaevo19]

Can you take a video about P300, P301, P302, P303, P304, how to test ignition coil. thank you💚.

[@Ecutestinglimited]

Thanks for the recommendation, we will look into making one in the future! 👍

[@uchihaevo19]

@konstantin-big thank you for your attention, but I know that. I want to learn how to test the ignition coil and its wiring because these fault codes do not always mean that the coil is bad.

[@uchihaevo19]

@@konstantin-big it's okay

[@konstantin-big]

@@uchihaevo19 Hey If I send you something they delete my comments

[@rqn1998]

P0101 tried everything wont go.... taken to mechanics etc its driving me nuts! Odbc reads p0101 changed maf etc etc....

[@Ecutestinglimited]

Have you tried conducting the tests in this video whilst wiggling the wiring loom from the MAF to the ECU? A performance code can sometimes be set when an intermittent fault occurs, such as damaged wiring that only becomes problematic under load or due to engine vibration. We would also recommend checking for air leaks in the intake system, as these can also cause the P0101. Hope this helps!

[@rlmbuildingful]

Same, did you fix yours?

[@rqn1998]

@@rlmbuildingful no i am going in on the 29th to ex holden mechanics.... thr car drives beautifully but this code will not go :( i have only changed 2 of 4 oxygen sensors so other than that i wouldnt have a clue... heres hoping! Please let me know if and how you resolve yours if you do...

[@405_hive]

Rude not to subscribe….

[@Ecutestinglimited]

Thank you for the support! 👍

[@autodiag9447]

@405_hiv= you re skin pain

[@ThePhotoDept]

I feel like I'm in automotive college.

[@Ecutestinglimited]

We're glad you enjoyed the video! 👍

[@tehdreamer]

I have CLS 320 CDI which has two MAF sensors with built in IAT intake temperature sensors. I have both MAF and IAT error codes and cant figure out whats wrong! I ran all tests look fine, values within range, voltage present at the connections. I guess the only thing is to check the wire resistance from ECU to the sensors? Maybe some intermittent short

[@Ecutestinglimited]

Hi. It would definitely be worth checking the readings at the ECU to ensure the fault doesn't lie with it or the wiring. However, if you are getting good readings at the MAF/IAT connector then it is unlikely the fault would be with the ECU itself. We would recommend checking the terminal tension on the sensor connector to ensure it isn't damaged, or you could conduct the tests again whilst wiggling the wiring loom all the way from the sensor to the ECU to see if the fault is caused intermittently by damaged wiring shorting when the engine is vibrating. If these all check out ok then it probably means the sensor(s) are the cause of the fault. Hope this helps!

[@user-vi4ub8xm6z]

I want to know how the ecu functions with the trotter relay, i mean how they do transition of electrical (intersection of wires)

[@user-vi4ub8xm6z]

I want to know how the ecu functions with the trotter relay, i mean how they do transition of electrical (intersection of wires)

[@user-vi4ub8xm6z]

I want to know how the ecu functions with the trotter relay, i mean how they do transition of electrical (intersection of wires)