Mercedes GLS W166 Adblue faults... Fault finding and repair.
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- Опубликовано: 11 июл 2024
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Hi
This 2015 GLS 3.0 V6 CDI, came to me with Adblue faults...
On the cluster, a message that the engine would no longer start after 489 miles...
Someone had the Adblue tank refilled, but...
Follow me on this video to find out what was the problem and how to resolve it.
Hope you enjoy the video.
Any questions or comments put them below.
Like always, thank you for watching! 
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Hey Louis,
I work at a Mercedes dealership in Germany. The fault you have is quite Common. You Just have to reset the warning via the ECM(Star diagnosis). Same fault Happens If you overfill the AdBlue Tank it then goes Into failsafe Mode.
Great Work as Always.
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Thanks!
Was the first time for me...
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Hi guys , I would like to ask you for help regarding adblue on w212 OM642
CODE : 20B1B The heating element of the AdBlue tank has a malfunction. Any idea what wrong it's the heater itself or can be fixed another way???Engine light is on but the car run perfectly. I would like to hear from Luigi some solution if is possible as he is all time with Merc.
Thank you
Hi
I haven't run into that problem yet, but I would say, check fuses etc... and test the heater, check live data, see if there is any sort of load information as you test it...
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Hi. I have been slowly working through your videos. It is a pleasure to watch a skilled technician who can actually do correct fault finding. A lot of so called mechanics have no idea what they are doing, other than read the scan tool and blindly bolt new parts on. I wish you worked in Yorkshire. Thank you for the videos.
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Thanks!
For watching and for your comment, really appreciated!
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Top as always Luis, I have a Q5 here that needs the Adblue level reset aswell but guess what my Autel packed up 😢
Great video nice and easy to follow, very very useful. Thanks keep the great videos coming.
Thanks!
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Nice one Luis. Poor customer must have had a hard time counting down all those miles until the no-start armageddon :)
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I would as well... lol
HI Loius,excellent work as always.i wish i could see you use the simulator when testing and repairing the ECU Board.Thanks.
Its easier to see the metering valve actuation if you put on the graph, its only works in very short pulses, very often the diagnostic tool dont pick that up when looking at the numbers. Also, Ive seen on many (if not all) of the Mercs that the temp sensor in the SCR module drops to zero.
I think that an other way of clearing the no start message, if its only the fill level of ad blue that has been too low, you can drive the car for at least 30-40 km for it to understand that everything is fine.
The SCR systems on these will not operate until it has high enaugh temp on both NOx sensors
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Are you from around the whittlesey/peterborough area? Mad to see those roads and be like thats x and x road!
in certain cars and vans if they run out of adblue then it requires a reset ,i am sure the car tells u to fill with adblue ,when its low ,depends on make and model but hey well done ,i work in hire company fixing these all the time ,
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Careful holding the phone when driving or our great Police force will drop the child abuse cases to hound you .Another excellent job👍
Haha don't graph and drive :D Same thing occurred to me when viewing the road test section.
Where are you based as I have a similar issue with my 2015 C Class?
Bro you're a genius👍
Really pertinent decision on resetting the module & continuing further investigation😉
Thanks for sharing, Stay Safe👍
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Can you drive the car after the miles count down is finished?
why didn't you check the reading from the Nox sensors. nox content before scr and nox content after scr. Typically, the nox content after scr is 3 to 5 times lower than before scr (in "ppm ")
Hi
I have Mercedes E Class 2018. Its Ad blue malfunctioning.are you in London, Do you have an address to bring it to you.
hi louis when i fill ad blue i turn on the ignition so the car can see the level rise i have been told that some cars use ultra sonics to work out the level and if the ign is off and the level fills into the neck of the fill tube the car when switched on do not see the surface of the ad blue and counts down from the pre fill level
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I never filled this one, but thanks for the info!
Hai sir good good day to you
The best way to use an euro 6 or 7 diesel disabling both dpf,egr,adblue systems by ecu software mod.catalytic converter is enough to clean exhoust gasses.it's just a car not a lorry,diesel train or vessel.
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Yes
Hi, i hve a mercedes benz glc 2.5d 2017 and i got a problem with adblue its shows me that my adblue is low but i went to gas station and fill up with adblue and still shows me that my adblue is low?
Most likely you need to reset the system....
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Hi , thank you for this video, what I need your help on is where u found the reset Adblue option and also did u need to be online as you reset it?
No... no need to be online...
It is in one of the menus, I don't know now from the the top of my head where it is though...
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If you have the Xtool D9 Pro, there is an option on the Special Function to reset AdBlue.
But there is a Peugeot, Citroen and Mercedes Benz. I haven't checked under the Diagnosis option
@@siyaonline I have an autel ms909
@@klapbackproduction2428 I am not sure which vehicle you want to reset the adblue on but the below answers are for a Mercedes Benz GLS:
1. Diagnosis > Motor Electronics (ME) > you should be able to find AdBlue option
2. Diagnosis > Selective Catalytic Reduction > adblue option should be there
If you do not come right, try Autel support for assistance.... Good luck
@@siyaonline thank you man I really appreciate
what a good morning
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hi, engine light came on with 'adblue system fault reduced in 456 miles' message. i have mercedez e class 2019 n its still under warranty, n made an appointment which is coming up, but after driving the car for 1 day, the message cleared up itself n engine light disappeared, should i still be worried and still visit mercedez or the problem is gone? thank you
I would definitely take advantage of the warranty and have it sorted...
Perhaps something is failing, and will be a matter of time till it happens...
If it is just the level getting low, or a lever sensor failing, they should be able to pinpoint...
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@@LMAutoRepairs thank you sir
Luis where you based?
2:30 Are you guys aware of such process, which developes in default SCR. A SCR that cannot do the reduction of NOx:s. Is it common that the SCR has gone bad for good and has to be replaced. Mine was bad at 156000 km. First NOx sensor was replaced at 137000 km. Now the car has second sensor and a new SCR.
I am just wandering, how these mercedesies should be driven and should Mercedes give instructions to users how to operate these extremely delicate systems. Also some knowledge from the situation should be visually shown on instrument panel continuously of dpf burns etc.
I grab Xentry immediately when working on Benz. Guess it's a habit . It is a common fault but you were smart enough to figure out what actually happened. Resetting values and adaptations is overlooked many times. Remember how they tricked people with the SBC on the W211? I made it a personal law that I do a forced/passive or active regen and reset with every repair on the exhaust and even before regular maintenance on every car with a DPF. I know that your situation is a bit different than mine but I have a lot of stupid clients. Those who buy a diesel car to drive 20 km's a day and those who have only city traffic. Almost forgot those who fuel up 10 litres at a time. Sorry Luis. I need to learn to write a short comment.
Don't worry... I do read comments, no matter how long they are...
I do go for the autel first, it a practically convenience...🤣
@@LMAutoRepairs like I wrote. Habit. Honestly. I have never used the Ultra on a Benz 🤫 weird if I think about it.
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Muito bom dia irmso luis.e bom trabalho
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@@LMAutoRepairs doutor luis algumas dicas para fazer toyota prius plug in conversion ??
I need your help Toyota Prado C120A CODE AND C1336CODE coming but I'm 608 no have test mode please kindly suggest how to reset this codes
Hi
What is the background of the car?
What work was carried out prior to the codes to come up?
Thank you for watching!
@@LMAutoRepairs everything is good sir coming work Shop for abs sensor problem we check codes rh sensor problem found after RP everything is good back to customer this code coming we going for checking testmode opinion not fond reset memory option found we can do anything reset memory
Those codes seem for a need for a calibration of the yaw and acceleration sensors...
@@LMAutoRepairs yes sir we do for calibration but IM 608 not available test mode option we do other scan tool
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We wanna know to whom the car belongs ! It's kinda crucial information. L O L.:- )
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Why doesn't it automatically reset like the fuel level warning light does
Totally agree. The car asks for adblue and then gets it. Why these BS messages must continue to haunt the driver is beyond my comprehension..despite there being 3 level sensors in the system.
I guess a money grabber from the dealers side...
I agree, that should just reset the error...
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RUclips showed me this along with Lenin’s body when I looked up Lenin’s body.
That code description is crap
be careful about driving in a 40 mph limit and showing 60 mph on the speedo , not a great idea mr.Plod will send you a NIP
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Why this scanner is so slow?
It is a 6 or 7 years old scanner, have been superceded by way faster tools...
Besides, I am not in a rush when working on cars...🤪
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i was horrified when i was this vidoe pop up ,ive got one with a nox sensor problem but autologic say it needs a 2 nox sensor the customer wanted me to give the definite asnwer to replace them, i would say yes until he told me they are £800 each , plus autologic say the some of the modules need updates as new nox sensor have been updated , this stuff is getting scary £1600 in parts
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That's bad... no wonder people will remap them out...
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@@LMAutoRepairs yer they do remap them out , i refuse to do anything like that i don't condone it , bit like all the poeple cutting dpf's out! not interest fix it the right way or take it away
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These things are such a big expensive problem ad blue systems.
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Indeed...
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The computer says no... terrible Mercedes Adblue software
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Hey Luis , thank you for your clear infos , I think I have the same issue,
My problem was error msg to check adblue (not to refill it) +check engine light, I tried to check the level from the Menu but the level was not readable!
I filled up the adblue tank with 10 L and drove for 80km then the count down scary msg appeared that I have 790km left to drive before it would not start again .
I connected obd tool (from Vw 😅🫣) had some errors codes I deleted them then everything was back normal no check engine light, no msg , no count down, the Adblue level is readable!
I am still afraid to drive the car for a long distance specially this sequences are not logic to me specially that I filled 10 L of Adblue two months ago ! No leakage under the car !
I don’t know what is going on !
Thanks again for your video cos it’s gives me a hope that maybe my problem is fixed.
Greetings from Austria 🇦🇹
Hi
Could have been a glitch, but the codes you deleted where your best clue...
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what a lot of messing about, just reset and get on with it, you dragged that out to some length
I didn't knew before starting that the reset was the only thing required...
Next time I will just show the problem, and then fixed... what about that?
The idea of my videos is to try to my best explain the diagnostic process, that way the fix should then make sense... and less questions will be left unanswered.
Thank you for watching!
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@@LMAutoRepairs google would have told you a reset was all that was needed 2 min job, no diagnostics needed
Google says many things, that are not always correct...
If you think you can diagnose and repair cars with Google... Good luck!...
@@LMAutoRepairs ive diagnosed and fixed many cars with the help of google. dont knock it
Of course you can, there is plenty of good information out there, and if you think about it, I am one of the contributers of it...
But I don't think you can diagnose every problem like that...
You can have the same problem caused by different root causes... and that is the difference when I do my videos... I don't just show the solution...
I try to show how I got there... so if you follow it, you might get to the point where you find something different, and that can help you to get to a different conclusion...
It is all about learning, and understand how things work, not just changing a certain part because someone you found on Google did it and fixed the problem... just because worked for someone else, does not necessarily means it will work for you...
That's just my opinion...
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