Don't let this trick you!

In this video we diagnose a check engine light and learn not to
always believe what we see!
Enjoy the video!
Check out my website ; www.diagnoseda...
For DDTSB visit ddtsb.com
For the Topdon tool used in the video:
US: www.topdon.us/...
UK: www.diagnostic...
EU: eu.topdon.com/...
For business inquiries ( not for technical questions); [e-mail]

[@Diagnosedan]

Check out my website ; www.diagnosedan.com For DDTSB visit ddtsb.com For the Topdon tool used in the video: US: www.topdon.us/collections/professional-series/products/phoenix-max UK: www.diagnosticconnections.co.uk/ EU: eu.topdon.com/products/phoenix-max For business inquiries ( not for technical questions); [e-mail]

[@steevalen-eq1cd]

IM STILL WAITING FOR MY CUT BUDDEY. HAVE YOU SENT IT BY PIGEN . 🤣🤣🤣🤣 . HOPE ALL IS WELL DAN .

[@t5ruxlee210]

A "Skor interrupt" is a brain saying "Hey, where is our chocolate ?"

[@igotaction]

Diagnose Dan doesn't get fooled, DD just teases the car a little before he finds the problem.

[@Diagnosedan]

🤣🤣

[@timre3310]

It don't get why he has his own repair shop when we have to help him diagnose EVERY vehicle... Love your videos Dan! Grüße aus Deutschland

[@Diagnosedan]

Ha ha and you are not even payed🤣 Danke sehr😁👍

[@rodvan-zeller6360]

I am retired automotive technology teacher, always told my students to cross reference dedicated vs global data, and at the same time have a lab scope looking at the live signal as an extra step. Great video.

[@Diagnosedan]

Bet you were an amazing teacher with lucky students👍👍👍

[@rodvan-zeller6360]

@@Diagnosedan Thank you for the reply. Lots of success stories, thank you. I had good teachers and mentors, including a retired engineer from Renault Formula 1 engine specialist many years ago.

[@mkuehn5450]

@@rodvan-zeller6360 one, check freeze frame data before clearing the code. throwing away useful information is never a good thing. two, skipping the step of knowing what values to expect from the sensor. in your experience, will the p0102 set at 0 rpm? comprehensive component test. unplugging will often only set the IAT circuit code, even engine running. my takeaway was the decision fork between pinpoint testing the raw signal, and looking at other potential causes. under reporting airflow versus signal absence.

[@arvindtaylor6871]

Sir is there a canbud lock you can apply to stop canbus thefts?

[@rodvan-zeller6360]

@@mkuehn5450 Along with freeze frame data, record mode 6 data before clearing codes, mode 6 data is not accurate until monitors run. Also, use mode 6 data to verify repair improvement and as a warning of how close something is to failing. By the way the $ sign on mode six stands for hexadecimal in case you were not aware.

[@CassidyBavarian]

Dan im a BMW specialist in Africa Zimbabwe nd u have improved my diagnostic skillz eva since i started watching yo vidz...thank u fo yo passion and dedication in this field!!!

[@genichiroashina6372]

Who drives bmw in Africa man, come on🤣🤣

[@genichiroashina6372]

The tigers will eat da bmw man come on man 🤣🤣

[@Ceepee25619]

@@genichiroashina6372tigers are Asian. Lions, leopards and cheetahs are African

[@genichiroashina6372]

@@Ceepee25619 but there no bmw man, trust me maan

[@Diagnosedan]

Thats great to hear!

[@deweyl.3714]

If there's a mechanic of the year award, it will be you Dan. Learn something new today even thou I'm no longer in the automotive repairs. Was a master mechanic for 2 decades. Your KZbin videos are the best. CA, USA.

[@Diagnosedan]

Thank you! That means a lot to me!

[@alextex2196]

DDan , you suppose to be a full time teacher in the automotive field, SMA is a master mechanic.

[@zbigniewrichard8291]

Actually, there are many other good mechanics out there. Unfortunately, they don't have a YT channel or don't care about sharing their knowledge. In Europe, Dan is one of the best. In the USA there are more. See for instance Pine Hollow Auto Diagnostics. Good honest guy, he records everything he does.

[@rhkips]

As a half joke/half talking point, I genuinely have a "Case Of Beer" line item in my invoicing software for those little annoyances like low fuel or mountains of personal belongings right where I need to be. I don't get to use it often, but it's fun to watch the hamster fall off the wheel when I do. "Yeah, that's for bringing me a car with no fuel and a driveability complaint, ya pool noodle..."

[@billrimmer5596]

Watched the vid as soon as it popped up. When in doubt go generic!! I always learn a lot from DD!! When they bring them low on gas, they pay 30 bucks for 10 bucks worth of gas. I think the beer idea is better

[@Diagnosedan]

Lets stick with the beer Bill🤣 Great having you here!

[@stevehayes7921]

Keep up the amazing work Dan .......

[@Diagnosedan]

😁👍

[@jimmybenz7886]

The best teacher , I support you from drc 🇨🇩 in Africa

[@imtheeastgermanguy5431]

🛠️👍😎

[@Diagnosedan]

Thanks Jimmy

[@reiannaidoo]

Dan is the GOD of diagnostics. Love the bloopers too lol.

[@Diagnosedan]

Thanks for watching

[@briangarrod8664]

You crack me up. Always bring a smile to my face. Thanks Bud. UK

[@Diagnosedan]

That means a lot! Thank you

[@AllenNix-iz6ev]

I think Dan is cool as can be ... Been watching him for years now .. love this man like a brother ...

[@Diagnosedan]

Thanks! 😁 Its an honor 👍

[@Martin120577]

Nice fix! Should be a rule.. no fuel= beer or cake !

[@Diagnosedan]

🤣🤣

[@carelectricaldiagrepair919]

I remember when I first learned the substitute value from Scanner Danner years ago, he was saying don't trust live data just check sensor output. Great video as always 👍

[@Diagnosedan]

He's right👍

[@deraculandrac917]

That is amazing! Who would have thought that in generic scan mode you could see actual live data from the sensor not what the computer is compensating.

[@Diagnosedan]

Thank you very much for watching

[@RATCHETMAN1001]

i got to say u are one of the best, i see so many so called experts on u tube and to see the likes they get amaze me. i see some and think to myself why did they put such a video out their. i guess people have not learned how to find guys like you, super mario and other top guys. if they watched u and the top ten they would not watch those others, but who knows. i get the most skills from you guys and thanks a gazillion for what you give us . been at this 26 yrs never stop learning. may be do a proper ac job when you get a chance using a micron gauge to show how it should be done. tom lech and hvac school channel has taught me so much. i was in the dark on ac for to long and they greatly expanded my knowledge. keep um comming

[@MaverickM1]

About the fuel: In my country (in the past) some mechanics used to drain your petrol and said "we did some long test rides to solve your issue". Sadly, after 20-30 years of that there are still people bringing their vehicle always with minimal petrol in tank. It is a bad reflex. Maybe your customer had a similar issue in the past with another mechanic and that's why the tank was almost empty. Sometimes you can't do anything against bad reflexes. Anyway, the video is very informartive Dan, thanks for sharing it. I learned pretty much from your videos and as a "repair my cars and bikes for myself" person I developed a lot!

[@Diagnosedan]

Taking fuel from a customers car is unacceptable, customers dont have to bring the car in with a full tank either but a bit more than fumes would be appreciated 🤣🤣

[@Shelby-ug5cl]

Your such a great teacher/Technician and I see your passion in this feild. You make things so clear and easy to understand.I feel like I got better at diagnosis as Technician since I started watching your videos 3 years ago. Cheers 🍻 lol

[@Diagnosedan]

Thats great! Very nice to hear👍👍

[@donalddavis581]

I always find it interesting that a lot of the times the very same day as something like this is posted, I get faced with the issue. 2018 E450 6.8L gas obviously with a easy to see miss. (not using a cheap scanner) check engine light on shows random misfire, nothing specific... live data, misfire counter..ALL ZERO's.... engine still shaking... generic OBDII and guess what.... misfire on #4. quick fix...Thanks for waking some of us up from time to time!!!

[@Diagnosedan]

I always check generic in those cases! Thanks for watching 👍👍👍😊

[@p.s.raghavan7045]

Wow !!! Once again systematic common sense troubleshooting of Dan does it again. 👌👋👍

[@markus9199pez]

That's unbelievable Dan, you give the most valuable source for absolutely free and what I mean is experience. Thank you for making those videos and sharing them with us, you are an absouloute hero. Big respect !

[@Diagnosedan]

Thank you Markus

[@Joey-rp5vg]

Fantastic Dan. You have a wealth of knowledge, great videos. Thanks very much

[@Diagnosedan]

Its a pleasure Joey!

[@vonrohr1968]

Love your show. You are a very good tech and I don't easily say this to many people. I would have never guessed that "live data" may have been substituted to keep the engine running. Good find!

[@Diagnosedan]

Thanks!

[@mentatphilosopher]

Always amazed how car proud your customers are. Except for one or two times, and usually when the car had been sitting at another shop, they always look freshly washed with clean and uncluttered interiors.

[@Diagnosedan]

Generally people take care of their cars over here. But i can assure you its not always the case.

[@erik_dk842]

@@Diagnosedan The Dutch are famous for cleaning stuff, even sidewalks. Many moons ago, while camping with my parents, we watched a young Dutch woman washing their tent, which had become very dusty in a French Mediterranian camping site. When the inevitable heavy rain shower came, we heard her screaming and crying, as the rain went straight through the fabric, since she had washed the impregnation out. LOL

[@GeminiSeven43]

Diagnose Dan Does it again and it is amazing how people bring cars into service empty. Thanks so much for this quick trip Dan.

[@Diagnosedan]

Its a pleasure, thanks for your kind words

[@Jermih223]

Great case study. On how factory live data can lie to you, and global by law has to display accurate info.

[@Diagnosedan]

Thank you!

[@htownblue11]

Not only a great example of possibly being fooled, you proved the real issue and verified the input to the module was corrected with new part as well.

[@Diagnosedan]

Thanks for leaving a comment!

[@ehombie]

As the wise man of Avoca, Eric O always tells: go obd generic...incase of substitute values in manufacturer mode. Very good example Danny!! (toch weer even een reminder...op dit aspect) bedankt voor de video.

[@Diagnosedan]

Thanks for watching!

[@panagiotisharos9625]

❤ congratulations... regards from Athens Greece..

[@Diagnosedan]

Thanks! 🇬🇷🇳🇱🇪🇺❤

[@simonfowler7561]

As usual REALLY thorough and smart thanks Dan the Man!!!!

[@Diagnosedan]

Thanks Simon!

[@neilrobertson6535]

You make it look so easy thanks for the invaluable information. A fan from down under.

[@Diagnosedan]

🇦🇺🌏🐨Thanks!!

[@ThunderbirdRocket]

That’s a great lesson and you are a tremendous coach !! Thanks 👊🏼 🔥

[@mikeburdi3464]

The only issue I have with your videos is that I would love to see more of them! 😅 You are a great diagnostician and I love watching your videos and your methodical process, and I have been in the trade for 30+ years so that should be saying something! Peace and respect to you and yours! 🙏🏼👍🏼

[@Diagnosedan]

That means a lot! Thank you👍👍

[@darrenhearn1365]

Well today was a school day! Thanks. Loved the fuel comment. I mainly repair trucks, according to my accounts last year I spent £460 on fuel to test drive and mot...... I did get some beer as well !😆

[@Diagnosedan]

Beer makes friends 😂

[@PineHollowAutoDiagnostics]

Hey Dan! Great catch with OEM vs Generic scan data 😊 One of my customers has a 2006 Hyundai Tucson V6. It had a "lean" condition and the diagnosis showed the mass air sensor wasn't reporting enough air! I unplugged it and car runs beautifully... He's been driving it like that for over a year now, no problem at all 😆👌

[@Diagnosedan]

Ha ha 😂 No parts required💪 I guess he doesn't mind the check engine light😁

[@bartscave]

Thanks for sharing Dan! Pretty smooth substituted values.

[@Diagnosedan]

😁😁👍👍

[@ardonjr]

I dont have a Hyundai, nor such awesome diagnose tools, but I loved this video. Great explanation and issue tracking. As a software developer I can relate to such testing methods.

[@Diagnosedan]

Its an honor coming from a person like you! Thanks

[@Kieran46100]

Excellent Dan, i love following your videos.

[@markt5426]

Thanks Dan, as always perfect every time. 👍👍

[@Diagnosedan]

😁😁😁👍👍👍

[@plonkarodder]

I love your show. It is really nice to learn how you think in diagnosing. And what tools you are using. And know my wish, I would love a deep dive in different types of maf-sensors. If the break in backfire, what goes wrong with them etc etc. Best wishes from Sweden.

[@toposism]

Great video , great approach! Greetings from Greece

[@Diagnosedan]

Thanks! 🇬🇷🇳🇱🇪🇺❤

[@michaelreeves8164]

Excellent diagnosis. You deserve the carton of beer! Keep them coming, you are a great explainer.

[@Diagnosedan]

Thank you very much

[@ZEROOOOOOOOOOOOOOO00]

You are the man Diagnose Dan!

[@Diagnosedan]

🤣🤣👍👍

[@marksantos2276]

Now that was AMAZING Dan.

[@Diagnosedan]

Thanks Mark

[@jgeorges3061]

I, knew Diagnosedan will not put me down and will show me that he fixed again with out any problem any car comes to his shop because he test not guise as other shop do that i call them parts changers AWESOME approach and thought process Mr. Dan thanks for sharing cheeeeers from Ontario, Canada.

[@Diagnosedan]

Thank you very much

[@gjavo6400]

Dan, you're the man. Fixed it again. Cheers from Spain

[@Diagnosedan]

Spain! Awsome. Gracias 😁

[@PDR-wb9dq]

Great work Dan I think I would have done the same thing as you did and assume the MAF was working, worth double checking as you did, I will watch out for that in the future, thanks 👍

[@Diagnosedan]

Smart thinking 😁👍

[@rusty911s2]

Really interesting, thank you: never seen this before and I've learnt a good lesson there.

[@adamdraper3335]

Well done Dan, turns out I am not too old to learn new tricks. I was unaware of the OEM mapping that can lead you down the wrong path. Education appreciated!

[@Diagnosedan]

😁😁👍👍

[@wholeNwon]

I don't believe my eyes: Something other than a German car having a diagnostic mystery. Amazing!

[@Diagnosedan]

Thank you!

[@amundsen575]

good job, this is why several different scan tools are needed to verify some faults. and keep your sanity!

[@thomaslam6821]

You Sir! Are a GENIUS! 👍👍👍

[@Diagnosedan]

Thank you

[@33798]

Learned and learning from you sir Thanks for sharing your knowledge

[@mikechiodetti4482]

Nice fix! So many times I've heard check the generic OBD data first! That helps, but it's the scope for the win!

[@Diagnosedan]

I use OBD a lot, can be very helpful

[@thogevoll]

That was very interesting and good advice. I can see how a person could get confused over something like this. Great advice about the low fuel and the beer too.😉😁

[@Diagnosedan]

Beer is always a good idea 😂

[@ricky613]

When in doubt, always try to make sure what you're looking at is reality. No wiser words have ever been spoken.

[@Diagnosedan]

🤣🤣👍

[@cliffperry8470]

Really good to see you back within a week of posts . More more posts please ur the best .

[@Diagnosedan]

Thank you

[@Rockport1911]

10:52 I always bring my car in fully fueld up. No complains until I had a recall that made the workshop replace the fuelpumps and I insisted that not a drop of diesel would get spilled on the inside of the car :)

[@Diagnosedan]

Typical 🤣

[@Agent-nw3it]

Having a fault code "scored" actually makes perfect sense when diagnosing a problem :)

[@Diagnosedan]

Yea🤣

[@kentaylor6563]

Hi Dan you seem to have the same values as we do in Australian. You can get more work done with a slab ( 24 cans of beer) than it costs to by 4…slabs. I have one for you my daughter has a Mazda cz7. Check engine light and airbag light both on. I filled the oil .. Both lights go out 😮

[@wamrfixit2]

Just delt with this a few days ago on a 2003 Kia Optima turned out to be the mass airflow sensor, and yes I had to go to generic OBD2 to find it

[@Diagnosedan]

Great job!

[@Hayssam_Hallab]

Your videos are so well presented and clear thank you ⚙ you are the best greetings from Germany🏁

[@Diagnosedan]

Thank you!

[@mariusnenu]

I worked on my neighbours car last week, and he also had a bad MAF Sensor too. After a few days, the EML came back on, and as it turns out, he also had a vacuum leak downstream.

[@Diagnosedan]

There are alot of things that can influence the maf signal so stay sharp 😉

[@ariedekker7350]

Het was weer mooi om te zien. Vooral de bloopers waren leuk. Graag tot de volgende aflevering. It was beautiful to see again. The bloopers were especially fun. See you next episode.

[@Diagnosedan]

Tot de volgende Arie👍

[@damienmilas8337]

Dan I'm glad I'm not the only one who gets cars with the low fuel light on ,we put fuel in and bill the customer great work mate love the bloopers 👍🦘🇦🇺

[@Diagnosedan]

We go to the bar and Bill the customer 🤣🤣 thanks for watching!

[@damienmilas8337]

@@Diagnosedan I think that's a much better idea lol

[@billburkart9087]

I liked the beer rant. lol. What would have been funnier would to go off in your language and the translate for us.

[@Diagnosedan]

🤣🤣 a rant in Dutch would probably be worse, i was being polite in English 🤣🤣

[@GerardBurkeBurkesGarage]

Nice work mate, 100% always gotta fall back on that when in doubt, especially with older vehicles. Love it 💪 Funny how I was working on a 2008 Tucson today with a 2.7 V6 engine light on and no running issues. Fuel trim and misfire codes stored, except in my case the AFM was replaced incorrectly at another workshop and the faults persisted. I smoke tested it and found a leak on the butterfly shaft of the throttle body. You never know what you might find on any given day. Keep up the great work and I'll see ya over this side soon 👌💪👏⌚🔜

[@Diagnosedan]

See you in a few weeks 😁👍

[@onemechca]

Great point Dan. Substituted values can fool you. Always look on the generic side to confirm. Keep the video's coming bud. 👍👍👍👍

[@Diagnosedan]

I will thanks!

[@Showing_the_car_]

Great video as always, thanks Dan👍 Being a lazy amateur I'd probably have just loaded up the parts cannon and bought a new sensor, so would have managed to fix this one 🤣

[@Diagnosedan]

That would have fixed it 😂

[@st-jf9hv]

you are amazing dan

[@Diagnosedan]

Thank you

[@404notfound.....]

Excellent diog work!!! 👍🏼

[@Diagnosedan]

Thanks!

[@konyoha]

hello I'm from Indonesia. learn a lot from you. but what I'm waiting for the most is your blooper..thank you

[@Diagnosedan]

🤣👍

[@michaelcook1923]

I wouldn't of changed the mass airflow meter after seeing the data. Well-done Dan keep up the good work.🇬🇧👍👍👍👍👍

[@Diagnosedan]

Thanks for watching

[@hansvanleersum8309]

Loud and clearly,great video, Thanks Dan, Hvl.

[@Diagnosedan]

😁👍

[@KMajorGreenly]

I absolutely love finding issues like this as a heavy diesel tech, the ONLY problem is when you go to the customer and say, "you'll never believe this, but.....". And the customer looks at you like you have 7 heads, great find! Always check OBD2 IMO.

[@Diagnosedan]

Thanks for watching!

[@MrRobMetal]

I had this exact situation happen to me aswell. the same brand and model car. This shows you to always to double check your own measuring tools, even though you think you're sure about the measurements. great work and greetings from Zoetermeer!

[@Diagnosedan]

Bedankt Rob👍

[@Coombsly]

I’ve come stuck with that years ago. Not again tho! Keep up the good work

[@Diagnosedan]

😁👍

[@toninocars]

Thanks for sharing. Your videos are so good and helpful, easily used for teaching young mechanics in workshops and universities

[@Diagnosedan]

Thats great to hear

[@HelgiThorisson]

Brilliant work as always, this could have fooled me to be honest.

[@Diagnosedan]

Everyone could fall for this,! Thanks for watching

[@mansouralblooshi3004]

Thanks for sharing Dan👍🏼

[@Diagnosedan]

😁👍

[@Barrys_Workshop]

Your videos are so well presented and clear thank you for your efforts

[@Diagnosedan]

Thanks for the great feedback

[@Nico_335i_DCT]

Nice fix Dan. Thanks for sharing. Have a good one, Nico

[@Diagnosedan]

Thank you Nico😁👍

[@DavidMartin-wq5pn]

I really enjoy your channel. Keep up the good work.

[@Diagnosedan]

Thanks David

[@ronaldwarren1267]

Great results cheers from NEW ZEALAND

[@Diagnosedan]

Thank you!

[@mehargee3297]

Always great work ❤❤❤❤❤

[@user-eu7fk4qn4i]

you teaching us good lessons every day.thank you very much dan.🙏❤❤❤

[@Diagnosedan]

You are welcome 😁

[@Schnippen_Schnappen1]

Thanks for this tip. Will save time/frustrations some day for sure

[@Diagnosedan]

100% 😁👍

[@thetraindriver01]

Great diagnosis Dan, generic and oem data catching us out.. brill 👏👏👏👏

[@Diagnosedan]

Thanks for watching!

[@kendom33]

Thanks Dan. I've been looking forward to a new video from.you. Nah you didn't really get fooled 😊 an absolutely top notch lesson. Thank you

[@Diagnosedan]

Thanks for your great comment its appreciated

[@AbbottAutomotive]

Good stuff Dan. 👍🏼

[@armyvet92]

Another EXCELLENT instructional video sir !!

[@Diagnosedan]

Thank you

[@nilsutt]

In my experience these kind of issues (questionable live data and in some cases incorrect fault code information) is what you get with an aftermarket scan tools unfortunately. Have worked both independ and as a service rep for an oem. These issues exist also with the original dealer scan tools but they usually gets these bugs fixes as long as they are caught when the product in question is in the warranty period 😂 For aftermarket scan tools the feedback loop through technical support, trainings and angry dealer service managers asking for policy or goodwill is just not there in the same sense

[@Diagnosedan]

Thanks for watching!😁👍

[@peterkimani938]

You will always be my number one teacher ,i always learn alot from you

[@Diagnosedan]

Thank you!

[@TTRVision]

... sometimes ... the substitute values are better than some aftermarket MAF`s :)

[@Diagnosedan]

🤣🤣👍

[@rongeernaert1208]

Very good action plan with diagnostic steps, so first look for the real fault with measuring equipment and not just replace parts one by one !

[@Diagnosedan]

Exactly 💪

[@stephenferguson6223]

Another customer who brings a car in for diag, with no fuel in it! 😮‍💨 Great video, I've seen this a few times over the past year. Definitely always pays to confirm the fault, top job! 👍😀

[@Diagnosedan]

Thank you very much

[@gastonbiscaro9550]

The Best ! Dan, Thank You

[@Diagnosedan]

Thank you

[@Bus2000]

Again another happy customer 👌

[@Diagnosedan]

😁👍

[@bill8by5]

Love the bloopers....AND the diagnoses.

[@Diagnosedan]

😁👍