Wrong parts replaced because of these scantools!

In this video we learn we can't always trust our scantools.
We compare a Snapon, Autel, Launch and a Hella Gutman to the factory scantool and find out if they are showing us the right scandata.
The results might suprise you!
For business inquiries (not for technical questions);
[e-mail]

[@SouthMainAuto]

And this is why I use Autel!! Woot woot! And yes this means Autel is better Dan! Jk'in I will give you some advice if using Autel on Chrysler EVAP systems. The advice is, don't use it. It displays the wrong switch status data for the NVLD and ESIM systems and will lead you to a faulty PCM. Has been this way for years. Real handy.... 😐

[@NewLevelAuto]

Ahem... let's call this for what it really is. When a scantool manufacturer BUYS their software from the manufacturer of tables of data values they have no interpretation of what may or may not be correct. They simply let an algorithm run and decode the data to be displayed. In this case we see the companies that actually purchased the data tables correctly from the OE versus one who steals it. They do not have a data validation team at Autel so it is easy to conclude that they have once again ripped the oe software for their algorithms and decoding. Great we can get the data, but at the same time a huge reason that all softwares from the OE are becoming less affordable and cloud based. The threat of intellectual property being stolen by dirty companies such as this have a much more negative effect in the long run when they can't steal from a cloud and data becomes unattainable for the average repair shop due to cost increases.

[@SouthMainAuto]

@@NewLevelAuto no comment... 😐

[@sidgysoho1960]

Glad to see you pipe in Mr. " Welcome Back Viewers ".And you do highlight a very important point, we are as consumers and service techs beholden to the whims & foils of state run manufacturers. If you are one who believes gov'mts & CEO's don't conspire then I am laughing at you. In all the little backroom conferences a lot gets decided about who gets what information and how. So it is no surprise to me that vendor " A " will get something different than vendor " B " depending om how much importuning has taken place. Such is the world we now live in.

[@rimmersbryggeri]

Luckily we dont get that many chryslers in europe. We some times had trade ins when I was in the peugeot dealership (Now parent od chrysler) was a 300c and was the most apalling heap I've ever been under and it wasnt even in bad shape. On secont thoughts maybe the lone 1980's ford E van I once worked on was equally bad and that says alot because I mostly work on VW:s these days.

[@Diagnosedan]

@@NewLevelAuto calm down🤣🤣

[@LAUNCHMalaysia]

Sorry to LAUNCH user and Thanks to Dan. We will correct the fault as soon as possible. The issue already report to the software department and it will be update on next update. Thanks for support and we will do our best.

[@Diagnosedan]

That's great to hear and don't Worry, most of the time the tool works perfectly!

[@davidhall3747]

Launch is my go- to Scan Tool. I like the two year free updates, and the Five year warranty.

[@iqbalaniff1650]

I have 6 scan tools and use Launch most times - there’s no scan tool that can do all - you need more then one scanner unfortunately

[@davidhall3747]

@@iqbalaniff1650 I like the Verus Pro because the Guided Component Test information is invaluable. The Oscilloscope is all I really need the Snap- on Scan Tool for.

[@SouthMainAuto]

I'd like to see that 😂

[@Michaeltje89]

You know it's a Dan video when Dan knows it beter then the scantool itself. Great video (again)

[@Diagnosedan]

🤣🤣👍

[@ScannerDanner]

What a great intro Dan. Love your humility and willingness to admit a mistake and awesome that it wasn't your fault! I'm here on an autoplay btw :-) Seems google knew I'd like this video

[@Diagnosedan]

Ha ha great to have you here Paul. We all make mistakes and we can learn from them. I bet you never turn an airbag module upside down anymore🤣🤣.

[@ScannerDanner]

@@Diagnosedan 🤣🤣 indeed!

[@salahabdulselam556]

Meeen you guys are awesome 😂😂👌, Eric O. , paul , ivan , keith ,dan all humble pies Greetings from Ethiopia Great respect✌

[@azjackal]

I tell people, every day Begin a Auto Technician is not a easy road ,u to triple check stuff even your own equipments,love this it's Tru , software bugs always there ,more scan tool is a must ,great video ❤🇯🇲

[@yurbeeinwatched]

I just ran into this 2 weeks ago on a Honda using a Launch scanner. The scanner had banks 1 and 2 backwards. I didn't trust it, so I tried my Snap On. My suspicions were correct.

[@Diagnosedan]

Fortunately you have access to multiple scantools!

[@pedroneves8288]

Today it's scan tools with software flaws, a few months ago it was a Bosch engine speed sensor poorly enginnered!... Dan, your job is already hard enough as it is!... I can't imagine your frustation when you get these kind of findings in your shop!

[@Diagnosedan]

You are right Pedro, it can be frustrating at times 😬

[@ggh057y]

i watch your videos for training purposes. your approaches are methodical and your ability to share your thoughts is perfect. thank you for another great video.

[@Diagnosedan]

That's a great comment, thank you

[@HelgiThorisson]

Amazing difference. Thanks for posting this video Dan.

[@Diagnosedan]

My pleasure

[@gutsngorrrr]

It's nice to see how quick SnapOn made an update for this fault. Great video as ever, it's just amazing how many of the scan tools were wrong, so no surprise you were led down the wrong path

[@Diagnosedan]

And one Day after the video, Launch reached out to me and fixed the software issue!

[@gutsngorrrr]

@@Diagnosedan I'm really impressed to see manufacturers actually taking notice and making the effort to look after their customers, because there is nothing worse than knowing there's a fault and nothing being done about it

[@gregjones8501]

This is one of the reasons I keep a different variety of scanners around in my shop! Great video Dan!

[@mechanoid5739]

How do you determine which scantool is is giving correct data?

[@michaelb7071]

@@mechanoid5739 I only use the original manufacturers scantool. Otherwise, you don't really know.

[@gregjones8501]

@@mechanoid5739 I honestly don’t think that I could spot that the way Dan does.. He’s just a beast on cars and diagnosing these types of problems. I’m nowhere near his abilities when it comes to these types of things. I just work hard and I really enjoy having different tools to scan different makes of vehicles. There’s a feel you get after doing it for so long like snap on is no good on euros, launch is no good on Asian vehicles so you just jump around and find what works. Hope I never run into this problem tho!

[@dawnrobbins5877]

@@gregjones8501 yes, and don't be surprised when the less expensive scan tool is the one giving you the more accurate information.

[@lordjaashin]

@@gregjones8501 launch is no good on Asian vehicles? I'm surprised because in my country (india), which is full of Asian car brands, majority of mechanics use launch scan tools and they work really good.

[@cccspokesmanandcofounder]

Fantastic, informative video, Dan! You always bring fantastic educational content in a manner that everyone can understand. Good luck with everything you have going on and congratulations on your continued success!

[@michaelchristou5127]

You are a genius!! Well done Dan!

[@Diagnosedan]

🤣🤣

[@vee985]

Great job Dan for the software bug discovery. This will prevent any more misdiagnoses in the field.

[@Diagnosedan]

Snapon and Launch made an update available that takes care of the issue!

[@shotgundiagnostics]

Great video and explanation on SCR/DOC/DPF system as well as the info on how you never know which tool brand will work on a given vehicle! Exactly why you can never have just one!

[@Diagnosedan]

Thanks for the comment! It's appriciated

[@cjspga17866]

Excellent Dan. As always, your associative thinking and attention to detail is world leading.

[@Diagnosedan]

Thank you very much, your comment is really appriciated

[@markt5426]

Hi Dan, Thank you for the video clip and very interesting regarding the results and also being totally honest regarding your dilemma.

[@Diagnosedan]

Thank you Mark

[@sharg0]

Great information as usual and with the added bonus of getting to learn how the ad-blue system works! (Where's the second thumbs up?)

[@Diagnosedan]

🤣🤣👍

[@ValeriosD]

Hello Dan. Diagbox is a very complicated tool. Sometimes it lies too or does not have enough data PIDs. After workin 15 years with PSA it still amazes how complicated it has become with euro 6 engines Nox sensors Adblue readings and many more.

[@Diagnosedan]

I fully understand, we get alot of questions on our DDTSB helpdesk about these systems.

[@slnhmb6191]

I saw many videos of others, But to be honest You teach smoothly and open, I appreciat u! Keep it that Dan!

[@UndercoverFerret404]

Never fixed anything on a car and probably never will, but I still watch your videos every time. If Sherlock Holmes had been a mechanic instead..

[@Diagnosedan]

It's appriciated that you watch the video's even when you're not a Technician!

[@randallorr3730]

Good example of being careful about the data you read. Scan tools are helpful but sometimes you can get tricked. Working in a dealership I see a number of the early glitches. I primarily do transmission work and for me the glitchy functions of even the factory scan tools is a way of life. Often there are tests that I need to do the factory scan tool won't work and the Snap-On scanner I have does and vice versa. There are certain models of transmissions the Snap-On scanner is useless for certain functions and I have to use the factory scanner. You illustrate clearly here the need when you see something that is wildly out of spec, try another scanner. In your case maybe the third one would have been the charm. Good video Dan.

[@Diagnosedan]

Fortunately most of the time my scantools show accurate data😁

[@vincentlallo6543]

i wish my teachers in school could have explained things like you i would have been a better student

[@Diagnosedan]

You are never to old to learn😁😉

[@WouterB76]

If you don't know what to trust, what will you trust? Diagnose Dan is still the man!

[@dawnrobbins5877]

When you're Dan....you trust yourself! Seriously though, when you KNOW that you know what you're doing, troubleshooting is so much easier.

[@Cees1984]

Thanks Dan !👍 lot of reactions on this topic i see. Personally i think It’s on of the most challenging systems to diagnose. You explained it really well how it works (my opinion even better then my master training at the Ford academy 😬😂) thanks again and keep it up 💪🏻👊🏻

[@ehsnils]

This is as I see it an effect of an incorrect scaling for the PID in question and I assume that manufacturers of aftermarket scan tools only have a few sources for PID data where most goes back to the vehicle manufacturer. And even at vehicle manufacturers the scaling sometimes gets incorrect. The reason might even go back to a replacement of the sensor late in production where you had sensor A during development but changed to sensor B with a different resolution and then someone forgot to update the PID accordingly. It can be even more interesting if the build order for a vehicle lists the wrong part number. A friend of mine had one car with a MAF issue but it was revealed that the build order for that car listed the wrong MAF and the ECU just thought it was a faulty MAF, not the wrong one and did set the check engine light and throw a code about a bad MAF. Replacing the MAF gave the same incorrect MAF again until there was a mechanic able to discover that it was the wrong MAF. I wouldn't be surprised if that happens now and then, something to consider when you end up with a lemon with mystery issues.

[@urbanjentry222]

Well explained thankyou

[@archyxwuff]

In this case most of the tools showed ten times higher numbers, so yes, a simple scaling mistake there. Back in the day there were also some brands of cars that gave fault code tables in base 10 and the aftermarket scan tool gave the codes in base 16, or vice versa. That was a fun time with Windows Calculator to convert between hexadecimal and decimal numbers. This is why I consider the scan tools just translators that translate the language of the control unit to a language that the tech undestands. The translation just isn't always right while it most of the time is. The French also have a (weird?) way of using some generally less used SI prefixes, like torque specifications in daNm (da = "times ten") instead of just plain Nm. This may have something to do with the ancient torque specifications being in kgm, as 1 kgm ≈ 1,02 daNm = 10,2 Nm, and I've spotted some obvious scaling mistakes by ten in translated torque specifications of French vehicles in the past, so this has been seen in print as well!

[@Sennator30]

Agreed, it just looks like it's out by a factor of 10

[@Diagnosedan]

It might be an incorrect scaling but still incorrect, Both Snapon and Launch made an update available that takes care of the issue. Most scantool manufacturers buy the software from third parties. Thanks for watching

[@dalejr82010]

I recently dealt with something similar while working on my BMW 335d - I was getting intermittent check engine lights and the LAUNCH Scan Tool was giving DTCs for DPF pressure issues. Checked the data PIDs and noted that there were seemingly erroneous readings for the exhaust pressure sensor. Replaced it and it stayed exactly the same (It was showing like 120psi). Ended up utilizing ISTA+ which showed the correct data and led me to find a soot clogged differential pressure sensor hose.

[@Diagnosedan]

Unfortunately that happens sometimes 😬

[@kennedysgarage3281]

Fair play for sharing this information Dan, greatly appreciated 🙏

[@Diagnosedan]

My pleasure 😁

[@HamiltonSRink]

Nice work Dan!

[@steveguest8028]

Great video Dan, i have actually experienced this myself, this time i was using the autel maxisys on a transit van and the tool miss identified the cylinder on which the glow plug was faulty

[@Diagnosedan]

Yes i've also seen that before

[@tomdelaney2480]

I really like my Autel--it sure would be nice to have a gas analyzer though-- many, many moons ago I used the gas analyzer to rejet carburetors on cammed engines--before your time sir--great video, thank you for your time.

[@Diagnosedan]

Thanks Tom

[@seedycanuck1739]

As always - excellent video. Used Snap On for years, altho' not on the newer models. Thanks Dan

[@Diagnosedan]

Thanks for watching Dale

[@trevormansfield6740]

Another very clear video. Thanks Dan.

[@Diagnosedan]

My pleasure

[@zaczac3024]

Great content as usual! These (branded) scan tools are expensive and so can make you too trusting! Any tools that make extensive use of software/firmware can produce plausible errors

[@Diagnosedan]

Thanks for the comment 👍

[@matejanosvarga8877]

Thanks Dan for putting this out. I remember one buddy of mine asking me to look up the part number for the "sliding door switch" on a Mk1 Seat Leon since that was the component his china knockoff VAG CAN PRO flagged up as faulty in his convenience module. I know this is a silly example but some people really seem to trust whatever they get to plug into their OBD socket.

[@Diagnosedan]

Thanks for the feedback

[@Subgunman]

Any recommendations for a late production 2006(7) Renault Megan with the 1.6 lt engine. Needing to activate cruise control indicator on dash, dealer refuses to do it since the car did not "come with it". Funny thing is that everything is there on the Privilege high end series. Add the switches on steering wheel and replace air bag that has the cut outs for the switches. Add the power switch on the panel for headlight dipping and it works. Would also like to reprogram the wireless remote lock sequence. One press of unlock opens only drivers door while the second press of the same button within 2 seconds unlocks the rest of the doors. Its great when one has the convenience of modern electronics until something goes wrong. Maybe its time for a military HUMMVE, plane Jane shaker under he hood THATS multi fuel and very little in the way of electronics to go wrong........

[@jamesbruno5896]

Great job as always Dan thanks for sharing!

[@Diagnosedan]

My pleasure

[@bobflannagan7262]

I love LOVE love this video! Dan, bless you.

[@Diagnosedan]

Thanks Bob

[@arthurfricchione8119]

Dan thanks for sharing. I’m not that familiar with Diesel engine emission systems but you not only explained the scan tool anomalies but gave me a heads up on diesel emissions. Thanks Dan and hope all is well Artie 😊

[@Diagnosedan]

Thanks for always leaving a nice comment Artie, its really appriciated 👍

[@danialbom5898]

This is an example of one of the frustrating things we are dealing also at franchised dealers business with OEM scan tools. It is not common issue but once happens and you realized you are dealing with false data, you start being an IT guy instead of diagnosis guy, downgrading scan tool versions, looking for known hotfix scan tool patches and trying updating the ECU on the vehicle. It is not only causing wrong diagnosis judgment and good part replacement but also time spent you cannot charge the car owner or warranty.

[@Diagnosedan]

You are right but like you say, fortunately it doesn't happen very often

[@robc5955]

I love modern life, so we have manufacturer approved repairers using approved software to diagnose, but from experience not enough people experienced to understand the data and find the issue, or we have extremely knowledgable non approved repairers using whatever they can get their hands on (at great expense) that may or may not interpret the data from wherever they source it, correctly. Brilliant.

[@Diagnosedan]

Thanks for watching 😁

[@danthecarman8440]

Great video Dan as always. I just brought the Autel MS909. That was a relief for me after watching your video. Thanks 😊

[@Diagnosedan]

🤣🤣👍

[@PineHollowAutoDiagnostics]

Very interesting video Dan! Was the incorrect data only on the downstream sensor, or both upstream and downstream? Can you swap the upstream and downstream Nox sensors to see if the problem follows the sensor? I've seen a similar scanner issue twice where the scanner would swap the live data for the rear ABS sensors... Code was for Left Rear, but speed was missing for Right Rear 😅

[@rimmersbryggeri]

Even the dealer computer can give you the wrong data. Funnily enough on this exact software. I did my work experience in a peugeot dealership and they frequently had codes for systems that were not even installed on that specific vehicle. For example automatic transmiison codes on manual cars or headlight leveling on cars without headlight leveling.

[@Diagnosedan]

This vehicle actually is not equipped with an upstream sensor Ivan, there is a value available for upstream Nox concentration but its an estimated value. Some brands do this on cheaper models to cut costs. The Nox sensor has got it's own control unit that communicates with the PCM via the Can-network. Because of this the Nox sensor is not "directly"connected to the PCM. When the Nox sensor sends its information it also tells the other control units who this information is coming from. So simplified: "Hello i'm the downstream Nox sensor and i'm reading 100 ppm" The funny and interesting thing is if you swap the upstream sensor to downstream it will still report on the Can-network as upstream, so this trick doesn't work 😉. I don't know if this is the case for all brands but it at least the ones i've worked on.

[@rimmersbryggeri]

@@Diagnosedan I don't think there really is any need for upstream nox and that is the reason why there isn't one. Since the nox sensor is diagnosing the preformance of the exhaust and has nothing to do with the mixing regulation it only has to measure the value after the relevant exhaust parts. The estimated upstream value seems like something they put there to show off rather than it having any practical purpose. Didn't VW seal adbblue for life and disable it all together (except under specific conditions) on their american vehicles a few years back.

[@PineHollowAutoDiagnostics]

@@Diagnosedan ah very interesting Dan! Definitely tricky to diagnose a sensor when the scanner is lying and you can't scope the raw signal 😆

[@mejesse809]

@@Diagnosedan he wouldn't know that

[@armyvet92]

Awesome video Dan !! I have been waiting for you to end up doing a video like this. I have ran into the exact same problems in the past. For me it was the “Last Straw” for my Snap-On and I have been using Autel Pro since then. The factory tools are just way too expensive here in the US.

[@Diagnosedan]

Some factory tools are expensive and some are quite affordable.

[@AT-wl9yq]

@@Diagnosedan I work for Ford. Ours are not expensive. You can use a regular laptop or tablet. Then you buy the software (IDS/FDRS), and to connect the computer to the car we use Bosch VCM's. Overall, the system works fairly well. Its just too bad our cars don't.

[@cyrexccc]

I’ve been watching Ivan and paul and others for years. KZbin just showed me your stuff today when I looked up to fix some things on my new to me Alpina. :) I’m watching all your vids. Love it!! And thank you!!

[@richard1835]

Another great video by Diagnose Dan. Thank you

[@Diagnosedan]

Thank you Richard 👍👍👍👍

[@twinbmx1]

Autel for the win I’ve never had a problem with them and love them. I’ve heard people say they don’t like them and that they’re garbage. I’ve used multiple Autels and have always been a fan.

[@Diagnosedan]

It's a great tool!

[@truth4reel]

Absolutely great tool. Torque app was my scanner until I got a 906bt about 4 years ago. For $1150.00 it came bundled with an inspection camera. This tool will run circles around any Solus or anything snap-on for 10k or less. The shear amount of special functions I can do is unbelievable for the price. Best tool for Fords outside of the oem. Looking to upgrade to the ms 919 for the programming abilities amongst other great features. I don't think I'll ever get a snap-on tool. 15-20k for a scanner for what?

[@chrisprobert6]

I realised nearly 30 years ago while learning diagnostics with early eg analysers, or any other digital readout.... If it's unbelievable high... Doubt the decimal point.... Honours to Dan for owning up to a rare mistake.....😅👍

[@Diagnosedan]

We all make mistakes,it isn't my first and won't be my last!

[@chrisprobert6]

@@Diagnosedan I already knew that....lol Will u own up to any more.hahah🤣 The more we make the more we learn👍

[@andresmejia7741]

Has happened to me a few times . Not only the wrong data but INCOMPLETE coverage of what they CLAIM they cover . You are a great teacher Dan , Thanks !

[@Diagnosedan]

Thanks Andres

[@TimmyTheTool]

Running 2 Autel tools and both have performed very well so far. Nice video Dan

[@Diagnosedan]

Yes we also use multiple Autel scantools in the shop and most of the time they are pretty reliable.

[@conjohn760]

Actually bought a Autel im608 for key programming but turned out to be my best diagnostic tool launch x431 ain’t worth a toss

[@Diagnosedan]

I have Both and like them borh

[@paulpaquette1961]

Nice find, but if you move the decimal place accordingly to the numbers from the factory tool and the Autel, All the tools seem reasonable, looks like a decimal indicator problem with the Launch and Snap-on. Cool! The PIDS are getting the right data from the ECU, but are displaying incorrectly. The trends in the numbers in the testing you did made me think of this!!!

[@hadley16301]

Thinking the same thing....likely software issue not hardware?

[@Texasknowhow]

Same. I was going to say the same thing. Lol

[@Diagnosedan]

Both Snapon and Launch made an update available that takes care of the issue 😁

[@geraldvaldez6036]

Reputation here on name brands is at question but as tech, it really lay a challenge on a chosen profession. Great video DD! Enjoyed!🙏

[@Diagnosedan]

That's great to hear

[@solpcb]

Another great video.. Thanks for explaining SCR systems in greater detail 👍🏻

[@Diagnosedan]

My pleasure!

[@FoookOff]

I had Texa IDC5 say the fault was with the adblue heater and a cheap clone say Nox sensor 2. I checked the feed at the Nox sensor, no feed! The £50 clone was right! The sensor had blown the fuse, I replaced the sensor and BOOM light went out.

[@Diagnosedan]

Amazing! Was your original Texa up to date?

[@josephrosella3042]

That cool van has a gear stick they are impossible to find here in the US especially in late models.

[@Nitrodr1]

Dan, you correctly prove that scan tools are just that, a tool. With your experience znd training your assisting everyone on how to better use a scanner along with doing better diag's. Thank you!

[@Diagnosedan]

Thanks!

[@dawnrobbins5877]

Yep, I enjoyed the video! I have two scanners and have experienced similar outcomes.

[@Diagnosedan]

Glad i'm not the only one🤣🤣 Thanks for taking the time to leave a comment it's appriciated 👍

[@jonathanrees3765]

Many many years ago a friend of mine did data capture for Snapon for Holden cars. Data and testing was done against GM/Holden tool and actual cars. Snapon ended up being better than dealer tool because errors in dealer tool were identified and fixed on Snapon. Holden cars were not new releases - GM tool was just not updated/tested very well. But then GM global (dealer) network was using NT4.0 way after it was end of life and totally insecure.

[@Diagnosedan]

I know people who still do this work for Snapon, they sometimes call me if they are allowed to use a car in our shop

[@fir3w4lk3r]

Nice! Did you try generic ODB mode with any of the "lying" tools?

[@shotgundiagnostics]

Always a great idea to check OBD generic mode!

[@Diagnosedan]

No brand specific only

[@robertgregilovich2229]

Wow! Nice find.Experience is the best teacher.

[@Diagnosedan]

Thanks for watching Robert

[@carlosmaurencig6763]

Great video, Danny!

[@Diagnosedan]

Thanks Carlos

[@robertvincent5678]

Kinda looks like the other scan tools forgot a decimal point. 5263 ppm instead of 526.3 ppm

[@hanskoef]

I Was thinking that too

[@dertypda7908]

Yep saw ot too and checked for a comment about it. Hope Dan replies...

[@quirinonavarro1857]

I agree with you, it look that the lecture whit 4 digits need a decimal point as you mentioned. The original scantool shows lectures on 3 digits as same as the Autel… saludos!

[@JaXXuSinc]

Exactly my thought

[@wallaceburjins6841]

Well spotted

[@madds6678]

Had wrong data even with a factory tool showing one of the keyless go sensors for the wrong door handle, very confusing as it showed the lock button working correctly but the unlock didn’t change indicating a faulty handle until you touched the opposite side handle to find that the pid now changed. How many door handles were incorrectly changed & the parts cannon then fired for an ecu god only knows 🤪

[@Diagnosedan]

🤣🤣🤣

[@AbbottAutomotive]

Nice work Dan 👍🏼

[@Diagnosedan]

Thank you very much 👍

[@technocris1]

Thanks again Dan ! , just a remark : your hands looks like real mechanic worker ! Congrats!

[@pesapesic4788]

Great video Dan as always, keep up the good work. How would you rate those scan tools from best to worst regarding their capabilities and functions? Im thinking of buying Autel or Launch scan tool what would you recommend?

[@Diagnosedan]

With Autel or Launch you can't reallly go wrong Both very capable tools

[@rodmaclean6862]

Amazing different, when you are making a judgement call on data, and the information is wrong. I think its hard enough to diagnosis some jobs with out questioning your data. Great video again Dan, as I said before, Dan your the man!!

[@hubfortech4227]

well... at least you have scan tools, wiring diagrams and access to oem parts. Try to diagnose motherboard of the phone: schematics that fell from truck in China, Black market board views made by someone, no access to parts other than scraping them from another phones and immortal chip serialisation and self-erase if you try to read it, not to mention chips that can not be replaced. Fun games:)

[@Diagnosedan]

Yes you are right, Diagnosing is difficult enough with accurate data 😉

[@SBK74]

Great video Dan, first I thought you were talking about a knock sensor, but when you came to ppm and particles I got it! :-)

[@Diagnosedan]

🤣🤣🤣👍

[@ouarijimmy8858]

thanks for the information, great video Dan.

[@gary23jag]

Was it not just a case of moving the decimal point to the left?

[@Diagnosedan]

Both Snapon and Launch made an update available that takes care of the issue

[@peti14045]

I've noticed a thing. The numbers are so similar to each other. Just put a decimal point after the 3rd number and you'll see. In that case that number matches the correct number that Dan managed to read with the factory scan tool. I wonder what was the number on the upstream Nox with the "faulty" scan tools.

[@alanh4471]

Interesting. Good eyes...

[@johnhousego9218]

VERY well explained thanks Dan.

[@Diagnosedan]

Thanks John

[@zef27]

Dan love your videos!!! Don't forget to check first the Vin number for any software update recall!!!!! Example DTC P0421for PEUGEOT'S and Citroen

[@Diagnosedan]

Thanks for the feedback

[@countryb3785]

Great video Dan. Thanks. Did you report the issue to the customer service/support department, for each scan tool, to let them know of the problem (so hopefully they can fix it in their next software update)?

[@dannylim3318]

Why? I'm sure each company is subscribed to Dan, and already knows about the problem. 👍

[@Diagnosedan]

I'm in close contact with Snapon and they solved the issue before the video was online. One Day after the release of this video Launch also reached out to me and updated their software

[@gtieddy6065]

I wonder if you could take a reading as 10x actual figure, being faulty calculation from the software rather than faulty reading. They all looked just about identical if you took the first 3 readings as a value 10x what it is supposed to read? Just goes to prove that this job is a constant learning curve.

[@simonilett998]

Yep, this was my interpretation of the values Dan showed too...Divide by 10 and they were pretty close to the correct numbers, but I have a feeling it won't always be that easy with every dodgey data PID🤣👍🇦🇺

[@kenromaine2387]

Agree, looks like many of the scan tools are off by 10x of the actual figure. Looks like a few software engineers forgot the decimal point....! ( 1000 should be 100.0 )

[@Diagnosedan]

You are right!

[@garaza24]

This is sad! In this situation is hard to explain customer that scan tool is lying, not you. Thanks for video!👍

[@Diagnosedan]

My pleasure 😁

[@htownblue11]

Great breakdown Dan. I think most any tech could have been easily fooled on that issue. It’s great info to know though, and if something looks way off on the data, might bE the scan tool.

[@Diagnosedan]

You are right!

[@Mrdubomb]

I think the scanner forgot a decimal place, as you could see on the test drive the numbers went down, not up with the incorrect pids. Its not the first time I've been fooled by a snap on scanner, but for all the money they charge us for these tools, maybe they should reimburse you for your misdiagnosis.

[@Diagnosedan]

I don't think that's going to happen 🤣

[@SharpTuskWorld]

They didn't forget. My guess is that it's parts per 10M and not parts per 1M or whatever the unit is. He needs to look at the scanner specs.

[@barniep]

It looks like, there is something wrong with the multiplication factor in these scantools 😮😮😮

[@Beyond-Repair]

I've had that on a scope before. My scope was reporting 49vdc on a 5v reference circuit.

[@Diagnosedan]

Thanks for the comment Bjarne

[@Retirement_Life]

Great advice, Dan.

[@Diagnosedan]

Thanks John

[@glennfoster7288]

Thanks Dan.🤷‍♂️ very important information.

[@Diagnosedan]

It is something to keep in mind Glenn!

[@Masso1973]

Nox nox Who’s there?

[@yazanalmograbe7171]

😂😂😂

[@Diagnosedan]

🤣🤣🤣

[@freeride202]

This happened to me last week. Chased an APPS signal drop out for an hour but in the end it was the scan tool reporting incorrectly. Verified this with two other tools and a Picoscope. I too have seen the OE scan tool report the wrong data. Fun times!

[@Diagnosedan]

Wow! 😬😬😬😬

[@generalgriphineworldboss1811]

you're the best teacher more audible than anyone

[@Diagnosedan]

Thank you very much

[@connector8748]

The wizard of diagnoses👏👏

[@Diagnosedan]

Thanks for watching

[@rlgrlg-oh6cc]

The vehicle manufacturer must provide information to the scan tool mfrs on how to access the data and how to interpret it. Possibly the wrong data was provided to three of the companies, then they found the error and fixed it before giving that info to Autel. Seems unlikely that all three companies would have gotten that same data PID wrong by chance.

[@djosbun]

I believe that Launch reverse-engineers other companies’ products in order to make their products.

[@Diagnosedan]

Most scantool manufacturers buy the software from third parties

[@cra3y]

It looks like, that 3 scanners missed comma in their values (the last zero should be after comma). Try to report this to scanners support contacts :-)

[@Diagnosedan]

Snapon and Launch made an update available that takes care of the issue

[@cra3y]

@@Diagnosedan Very quick reaction from them! Kudos for You (and them)

[@kevlec1947]

Great Video Dan. Keep them coming.

[@Diagnosedan]

Thanks Kevin

[@davechapman7735]

I really enjoy all your work thanks Dan. cheers NZ

[@Diagnosedan]

Thanks Dave!

[@stejac51]

an EXCELLENT catch ... well done ..

[@Diagnosedan]

Thanks Steve

[@mikeberry304]

Another great video Dan , we just have to have so many diagnostic toys to do our jobs, well done , at least you have a known good testing Part for these now

[@Diagnosedan]

Thanks for watching Mike

[@gregred78]

Good info glad you brought this to my attention. I guess I was like probably 90% of other people and wouldn't think that you pay Good money for a good scanner brand and it could be so off the mark!

[@Diagnosedan]

It doesn't happen very often, most of the time they are showing the right data

[@aurimas474]

Was looking forward to the bloopers though. :D Great video, thanks.

[@Diagnosedan]

It actually went quite good this time so no bloopers 🤣

[@andrewgray3482]

Great video Dan 👌

[@Diagnosedan]

Thank you Andrew

[@ashercohen4739]

I loved the tutorial video of the Pure System thanks Dan

[@Diagnosedan]

My pleasure 😁

[@MarioDallaRiva]

Thanks, Dan. Most interesting!

[@Diagnosedan]

My pleasure

[@TheKeenMechanic]

Another amazing video Dan. Keep it up

[@Diagnosedan]

Thanks!!!!!

[@dimtsio9200]

Hallo Great diagnostic procedure and really odd scan results. Taking advantage of this O2 problem, i think it would be a really good video of explaining why in the early VW 1.6 FSI Engines (e.g : BAG) the NOX Sensor failed and kept failing after replacement (the new component cost over 500Euros). Furthermore what it's role is for the engine and the working condition of the vehicle. Thank you and i hope for a response as it is a very common problem that has caused too many problems for people that had this particulate engine.

[@hansvanrengs2642]

Weer een mooie toevoeging Danny, goed verhaal. Groet Hans

[@Diagnosedan]

Bedankt Hans 👌

[@joseramonherreramendoza9260]

Yes Dan... that was an amazing video indeed... thanks a lot 👋😎👋😎

[@Diagnosedan]

Thanks you José!

[@TheDisgruntledMechanic]

Great explanation as always Dan! Thanks. WHAT? No bloopers? 'Must've done it in 1 take!

[@Diagnosedan]

🤣🤣 No bloopers this time Mike