Adblue fault P20E8. Explained and Fixed.

[@Diagnosedan]

Check out my website ; www.diagnosedan.com For Diagnosedan Tsb visit DDTSB.COM For the Topdon tool used in the video: US: www.topdon.us UK: www.diagnosticconnections.co.uk/ EU: eu.topdon.com For business inquiries ( not for technical questions!); [e-mail]

[@typxxilps]

lot of work and thoughts to get such a brilliant explanations videos with all the issues and steps to check like the working tank on the bench.

[@typxxilps]

What has happened with the Mercedes A Class from last summer - I mean 2023 ? That had many fault codes and you wanted to diagnose it later cause I had seen it only once after that: in the bmw video. thanks

[@Diagnosedan]

@@typxxilps eventually it was fixed but it turned out it had many issues and also had been involved in an accident and it was poorly repaired. We had to redo much of the repairs. Eventually it was fixed but with the background and history of the car we didn't feel comfortable selling it full price to one of our customers. So eventually we sold the car at an Auction for an Auction price.

[@janstor3620]

Hi Dan. Can you recommend a de-crystalization fluid ? Or will it prevent crystalization too ? Is it worth it ? I just spent € 1,000 for a new addblue tank on my P2008 after being diagnosed low fluid pressure probably due crystalization inside the tank. Dealer says they are told not to fiddle with the components by Peugeot. The car was not driven (by wife..) for several months. Expensive lesson ! Great videos !Thanks.

[@nesmio7378]

I work at a Peugeot dealer as a Master Technician and have done 100's if not 1000's of fault findings of these Adblue systems throughout the years. The video is very very good and the DDTSB information you flashed up on screen is pretty much spot on with my thoughts, experiences and conclusions. Couple things I'd like to add / correct. Note - these are my own thoughts, theories and results from experimentation - I could be wrong - it's just what I have seen. Like Dan said - the 4 bar pressure reading doesn't mean anything, it just means there is no pressure in the system since there is never a point of operation where the pressure drops below 5 bar. The reason for this is not necessarily and only the pump having failed as many think. The P20E8 is in my opinion a badly worded fault code and should instead be worded as "P20E8 - Tank internal fault" because the control unit of the tank runs it's own internal check of all components before turning on and activating the system and if it finds anything out of the ordinary it will not energize the system and will flag P20E8 - Low pressure which as I said just isn't true and is badly worded - there is "low" pressure because the system isn't turning on - not because there actually is low pressure during operation. I've tested many many tanks after having replaced them to play around with them for fun and test each individual component, I personally have never had an internal component actually fail and not respond to voltage being applied - pumps, valves, sensors, temp sensors, heaters, level sensors and so on - for me they've always worked when tested individually. I've seen corroded circuit boards from the internal pipe connections leaking and filling up the cavity and eventually all the way up to the board and thus corroding it. Many times I feel there is something wrong with the circuit board or the logic of the circuit board and not actually with the physical components of the tanks themselves. I've sometimes tried to swap individual components like pumps etc from a known good working tank but it never solved anything. I've tried to flush the whole system with warm water and separately activating the pump and shutoff valve with a disconnected injector to flush everything through the whole system - for me personally this has not solved any cars - I might have been unlucky and only done the flush on circuit board damaged tanks though - who knows, maybe there are some cases where flushing would help because I've also many times had the theory that crystallization is at fault inside the tank - personally as I've said I've not been able to ever fix a tank by removing the crystallization through flushing. Next important thing that I maybe think Dan might have overlooked / forgot - If there is a P20E8 fault in the ECU for Adblue it will not even try to start the tank until the fault code is correctly reset and all activation / command functions will not work either - like activating the pump. To actually get the system online again and to make it try to run again or to get it to respond to commands you need to not only delete the fault code but also perform a "Re-initialization of the Adblue system" before it starts working again. Just deleting the fault code without doing the initialization procedure is not good enough and will not work if you want the system fully reset and able to respond to all your commands and activations - my theory is that perhaps Dan forgot the re-initialization procedure and only deleted the fault codes which is the reason the pump activation didn't work through the scan-tool with the old tank until the new tank with no faults inside and fully reset memory was plugged in after which it worked - perhaps Dan can confirm or deny this. Remember to perform a re-initialization / reset of the system before testing because just deleting the fault codes is not good enough. Overall this is an extremely extremely frustrating fault to have as a technician because whilst replacing the tank solves the issues 99/100 times I never actually know what's wrong inside the tank and have not been able to find out through countless experiments and dissections of old non-working tanks either. I think it's most often a circuit board issue and not a mechanical one inside the tank - of course that happens but I don't think it's very common and neither is crystallization damage. I know of companies who repair these tanks and I always wonder what the solution is, I'd love for someone else to chime in with their results and theories or solutions they've found to actually fixing a tank with another method that isn't just replacing it. I'm happy to answer and help with any questions, I have also commented under almost every single P20E8 video here on KZbin with more bits of information and my thoughts and findings - check them out if you want to learn more because I don't want to make this comment infinitely long - it's already bad enough ;)

[@tomeksurdacki748]

Very good comment.

[@gerigesquiere66]

Many thanks for this interessing information.

[@jyrgen3]

The problem with these cars starts when the adBlue tank is not filled at the "right" time. The first warning probably comes from 3000 or 2500 km, and if you drive until it shows 2000 and below, you will probably end up with a bigger problem. Newer models from 2023 have this problem fixed. No warranty is offered, of course, although that could be exactly where the manufacturer should be sued and asked for a refund due to faulty design.

[@jordanadam87]

@@jyrgen3 Do you mean that problem is fixed because they are not providing any warranty for adblue system? :)

[@nesmio7378]

@@jyrgen3Warranty is offered and there even is extended warranty for specific Adblue issues. In some countries like my country of Sweden there is also a mandatory emissions component extended warranty of 5 years / 80000 km. Those few times the warranty isn't covering anything usually insurance will. Very few cases where the customer truly doesn't get help from anywhere and in those cases usually it's deleted.

[@petergrunendahl8799]

My neighbor had exactly the same problem. Flush the tank AND clean the blue cover from the tank. If the three (4?) little air holes are blocked the system shut down because of „wrong pressure“. His dealer want 1.300 plus tax and labor. Problem was solved with € 25. Car is running one year since. Regards from Belgium.

[@MichaelVermylen]

Dit is de reden waarom wij onze 1ste, en meteen de laatste, Citroen Berlingo na ongeveer 3 jaar hebben weggedaan. Een rekening van ongeveer 1500euro. Rijden nu Suzuki, en gaan NOOIT meer van merk veranderen. De betrouwbaarheid en de fabrieksgarantie is iets waar veel merken nog iets van kunnen leren.

[@bmwm6cabrio06]

​@@MichaelVermylenSuzuki is echt een geweldig merk, heb meerdere swift's gehad gebouwd tussen 97' en 03'. Ontzettend betrouwbaar, simpel en zuinig. Ik rij nu zelf Toyota na heel lang Duits te hebben gereden, ik rij ook nooit meer iets anders.

[@carlosgilpinheiro7510]

People are comparing diesel engines with Adblue with petrol cars! Makes sense... I can come with a point, had PSA diesel and petrol models from 20 years ago without any of the problems we see here... If we start to compare what is not comparable to make a point we can come with models from the same brands from the past to say the same thing.

[@hansjochen6257]

Ok and where are the little air holes for cleaning?thanks

[@Butlerbob]

Dealers are Stealers, always, you buiy a new car and you can get almost the whole world from your dealer, but if you leave with the car the gate, than the dealer is not reach anymore, so Dealers are Stealers always!!!!

[@wlrIII]

I always give Dan's videos a thumbs up before I watch it. I've never had to go back and change it! You da man, Dan.

[@careyautorepairs]

I do also, its just second nature to give Dan all the support now because he's so kind and helpful. One day Dan will trick us all with a boring video with just a quick intro and a photo of a bottle with some repeat music and he will be counting his best fans lol.

[@Erez84]

Big spender you are

[@robertsmith2956]

Eventually I have to smuggle a diesel into the country since I can't buy it here, so I really enjoy seeing how they operate. It's a given that if you can't buy the engine, you can't get the electronics for it either.

[@christopher_ahs]

Agreed! Do the same 👌👌

[@Diagnosedan]

​@@careyautorepairsha ha you know i never will be that mean🤣

[@ceesklumper]

Thanks also for all the trouble you go through in filming, editing and posting your videos. That's a lot of effort on your part.

[@Diagnosedan]

And eating flies🤣🤣

[@grompertje]

Getting DDTSB in our shop was the best decision ever!!!Highly recommended,saved us hours and hours of diagnosing time.

[@Diagnosedan]

Thanks for the great feedback 😁😁😁😁

[@dalehamlin7383]

Dan, providing these videos for free is beyond generous.......! It is so amazing to see the complexity of these vehicles. Your honesty, transparency, and sense of humour, make these videos so enjoyable. I do not work in this industry, but can only imagine how helpful this information would be to those who do this work every day. Wishing you and your business continued success. You deserve a million views IMHO..........! Thank you.

[@Diagnosedan]

Wow must be my lucky day! So many fantastic comments! Thanks its really appreciated 😁👍

[@sollykhan2385]

What,,only a 'Million' ? Dan deserves much more than, i would say around 10 Billion is a good starting figure 🙂

[@kennedysgarage3281]

As a garage owner & fellow KZbinr I would have to agree that DDTSBs is the best spent money for me. We use it everyday on more complex issues & it always helps us in our diagnosis. I also watch the educational videos on it most days while eating my lunch 😊 It is excellent value @ around €350 or so per. annum. Excellent tutorial Dan, I really enjoyed it 👏👏👏

[@Diagnosedan]

Thanks for the great feedback! Great to hear you also have a YT channel! Keep up the good work!

[@waynehaw7915]

I'm in Australia, been a mechanic and an auto teacher for many years. Your videos are spot on. Well done.

[@Diagnosedan]

Thank you very much

[@supertekkel1]

This video finally explained the noise my van makes when i shut it down! was wondering for years...

[@Diagnosedan]

🤣🤣 now you know

[@gordonliverpool]

Love the way that you investigate and explain your work. Brilliant.

[@Diagnosedan]

Thank you!

[@trevormansfield6495]

Brilliant video again. I really think that PSA should give an extended warranty of at least ten years on the tanks. They are in no way fit for purpose. I’ve seen this issue many times.

[@DrDre-ir4gu]

Yeah, designed by the same guys that gave us the wet timing belt 😂

[@Dadadu16]

​@@DrDre-ir4guwet timing belt is NOT a problem! The problem come from piston rings!

[@SamiMarjeta]

Proace owner here. I got same issues last winter. 2018 model so 6 years old. Toyota covered the 1800eur tank replacement since all service history was with Toyota dealership.

[@nesmio7378]

There is 6 years extended warranty from PSA for this issue. After that usually most insurance companies cover mechanical issues between 6-10 years of age on the car. For the cases not covered by warranty or insurance a delete is the most logical solution.

[@Diagnosedan]

There are many lawsuits against them and they are loosing them. In Italy the issue showed in this video must be fixed by the dealership for free already and many more countries are following.

[@urbanbogataj296]

i am dealing with addblue issue on my 1,5hdi citroen for a year now. it's sad that i have to explain to the dealer where to look for solution.Thanks Dan! you are realy expert.. :)

[@Sean_Diagnostics]

Interesting to see the diagnosis and fix, we see it too often at our dealership 😂. Just a tip on expert/proace/jumper/boxer/vivaro with a 6.4 diesel norm there is a tsb stating you cant use decrystaliser because it can corrupt the Adblue concentration sensor

[@Diagnosedan]

Thanks for the feedback!

[@sampsonsunny6298]

Electrical issue.love your work Dan. I'm 54 years old and you never stop learning. But what learnt from this video, don't but vehicles with adblue.😊

[@Diagnosedan]

🤣🤣

[@letzrockitrite8469]

Thanks Dan ! ..... best blooper segment ever ! ..... def ........ definitely engineered funding

[@Diagnosedan]

Remember i had to eat a fly for that🤣

[@geoffaries]

Another fascinating video from Dan, my days of worn cars has long passed, but I enjoy watching repairs and especially fault finding. Imho no one, that I have found, is better than Dan. I am still a petrolhead, but when I see the complexity of ICE in normal cars, the more attracted I become towards BEV's.

[@Diagnosedan]

Thanks for taking the time to leave a comment its really appreciated!

[@N269]

What an articulate presentation. Your description and flow of the subject are excellent. This must have taken alot of effort to produce. Thank you indeed.

[@Diagnosedan]

Thank you very much

[@sollykhan2385]

@@Diagnosedan 😇

[@mentalmechanic]

I love these videos. No one like DiagnoseDan. Absolute legend and wish he had more time for KZbin.

[@Diagnosedan]

No one like DiagnoseDan? 🤣

[@ColinHunt-j7m]

I've had many company vans Peugeot expert and main dealer couldnt even fix you the man proper good engineer love your work need more content mate

[@elliottpeters2996]

Very informative video Dan. One small correction though .. A pump does not deliver pressure, it delivers flow. The performance, and power consumption are measured by the pumps ability to overcome a restriction to flow (causing system pressure).

[@josepeixoto3384]

eh eh eh lots say it, i say in the real world it delivers pressure; proof? no pump, no pressure

[@Diagnosedan]

The only way i can measure how much restriction of flow the pump can overcome is by looking at the pressure it can deliver. How would you have worded it in this video if you did a test to see if it could reach the required pressure?

[@mikaelhg]

I don't have one of these vans, and I'll never fix one, but I do diagnosis and from that point of view this video was super interesting, and I appreciated your experience and the fact that you're sharing it.

[@Diagnosedan]

Thanks! What kind of diagnostics are you in?

[@devttyUSB0]

Awesome diag! Thanks so much for explaining your mistakes in such a clear way! Absolute legend.

[@Diagnosedan]

😁🤣

[@paulp96275]

Dan you are the man your bloopers are fantastic it shows your one of us that get tongue tied I normally find it’s when I go to the bar 😂👍🇬🇧

[@Diagnosedan]

I really struggle sometimes, especially when i get tired🤣 In the bar when i sing karaoke it goes a lot better 🤣

[@kenmcvie6350]

Love the bloopers Dan. Your english is very good tho! Gave up being a mechanic when cars were much simpler and quite easy to work on.

[@Diagnosedan]

A lot have changed 😉

[@kenmcvie6350]

@@Diagnosedan yes things have certainly changed. I own a twin turbo Subaru and had to do the motor up at 170000km, I had a friend helping, but what a terrible thing to get the motor out, and back in again.

[@jakezxz1352]

Im not a mechanic at all but I am subscribed because your videos are so well presented and fascinating. Awesome work!

[@Diagnosedan]

Thats great to hear, thank you😊

[@Tapir18]

There is a software fix for this issue causing the pump to work for max revs for extra 5-8 seconds after the engine is off. This will prevent the crystallisation inside the pump. Unfortunately the dealership will update your models only if you already have a problem.

[@Diagnosedan]

Thanks for the feedback

[@emrekara7587]

A very educative and also entertaining video. It made me forgot my faulty addblue headache

[@Diagnosedan]

🤣🤣

[@vincentking5122]

Just to add a lot of people don’t realise that these vans also run eloys/pat fluid as well as adblue and when they run out of fluid it shuts down the adblue system,people wrongly assume that additive just means adblue

[@Diagnosedan]

Even alot of workshops struggle with this! And to be honest my aftermarket scantools sometimes get this mixed up as wel! Especially when the scantool just shows "activate additive pump" and it doesn't activate the AdBlue pump but the Eolys pump. Thats one of the things that actually happened off camera in this video. As i suddenly heard the clicking of the small Eolys pump when i thought i was activating the AdBlue pump!😅

[@denhaagtrader8781]

Ive had that before dan and i replaced the eloys fluid tank and didnt solve the problem.the customer didn't pay and left me out of pocket as a garage owner. It's getting tough out there!! ​@Diagnosedan

[@peterdalton4370]

Dear Dan, Thank you for the information you share with us. I may never get to work on any of these vehicles but the knowledge you share gives me the confidence and understanding of modern diagnostic methods and an insight into the design and workings of modern automobiles. Best regards, Pierre. PS: I spent 20+ years working as a telecommunications operations technical officer so fixing complex systems is something I have some experience of. I enjoy the thrill of the chase (so to speak) , cracking that elusive fault and the mindset and determination of the master fixer.

[@Diagnosedan]

Thank you for the great comment, sound like you had an interesting job

[@ibrahimcehajic]

That def tank was programed to fail, to generate revenue

[@tracycolorado]

Truth

[@greebj]

The irony that sometime somewhere a car will be junked because of a non functional 'environmental damage mitigation' feature.

[@Diagnosedan]

Sometimes i think the same but it doesn't make any sense as they are loosing many lawsuits and in countries like Italy they already have to fix this fault for free. Many other countries are following.

[@ozzstars_cars]

I would have been here sooner if I could have been but I had to clean and polish the Corvette. Dan you are the Man!

[@josepeixoto3384]

coincidence i was on my 5.0 HO here in portugalia

[@Diagnosedan]

I'm surprised there is any paint left on your car! I should be bear metal by now 😂 You spend more time polishing it than driving🤣🤣

[@ozzstars_cars]

@@Diagnosedan lol 😁

[@TVwatcher-ic3ne]

A blocked urea fluid pump? Have you tried cranberry extract? 😂😂😂

[@johnnyblue4799]

[@davidkaye8712]

Could be a stone, uff !

[@Diagnosedan]

😁🤣

[@GaryCoates-pm4yu]

Have you tried watching the video

[@mihaiionescu2898]

U are the king of diagnose. I like the way you aproach the problem. Much respect!

[@Diagnosedan]

Thank you!😊

[@Mytwistedvoices]

In the United States, Tank with Blue stuff, pumps and UREA are common terms for an RV toilet. I had to look up what Adblue was...DEF. I only watched the first few minutes. I started over after looking Adblue up. Finally I saw it on the dash screen but I was wondering if the Europeans had a toilet facility in the driver's seat. Dumb I know

[@josepeixoto3384]

totally dumb; and i hear that in 2027 pure piss can be used, new ionics will allow that, no more adit till you turn blue, or ammonia needed, All the lawmakers up here in Brussels, they who made this Pee Law hing mandatory are already starting to pish on a large container, they made this law too, and every urea car owner must do the same, and age it for 90 days; or else, the car will not start after 1000 kms; the dumbest thing i've ever heard for a set of wheels, karaaazy,man, karaaaazy

[@Diagnosedan]

AdBlue is a registered trade name for the stuff you call DEF. But its know under many names in different parts of the world.

[@Mytwistedvoices]

@@Diagnosedan I work Aircraft field avionics on some of the most complicated aircraft. I have adopted your approach to troubleshooting. It is very professional. I have the customer under pressure to make flights. With your method, I can reproduce faults or determine it was pilot error. Step by step philosophy on how the system works. Demonstrate the the method of repair that will work. Submit my findings for the repair approval. The keeps the risk low and eager owners from sending up dangerous airplanes. If I can earn their confidence thru professionalism, I can keep them flying safely.

[@stevehayes7921]

Brilliant Dan, always look forward to you're in depth diagnosis, a joy to watch, bloopers being the best bit !!! Also if they are doing exchange tanks, it's vary likely to be a circuit board problem, as that part is probably easily repairable..

[@Diagnosedan]

You are proberbly right😁

[@ehsnils]

Running the filter backwards should have been something to test. However it's a bit annoying that a key item like a filter can't be replaced. One thing with AdBlue is that it will crystallize also if it's mixed with diesel, so be very careful to not get diesel into the AdBlue tank or AdBlue into the diesel tank. The reason for pumping back the AdBlue into the tank is to avoid frozen hoses in the winter.

[@rl3898]

Surely it can be replaced as that is a reman unit Dan fitted and the filter must have been changed.

[@Diagnosedan]

​@@rl3898i think what he means is that it can't be replaced as there are no spare parts available

[@Diagnosedan]

Thanks for watching!

[@steve6375]

Isn't there also a danger of crystals forming in the tube and thus it would get blocked?

[@ehsnils]

@@steve6375 It's an interesting thought. However the primary cause for crystallization is low temperatures and evaporation of the water in the fluid. Distilled water can dissolve the crystals if they are caused by evaporation. The best is to avoid it from happening by keeping the tank topped up.

[@janmeij60]

Bedankt voor deze leerzame video 👍Ben toch nog wel benieuwd wat er mis is in de tank en het blijft toch vreemd dat het filter niet is te vervangen.

[@christophersebastian4855]

They don't want you to replace the filter. They want you to buy a new tank. 😫

[@Diagnosedan]

Niets is (officieel) te vervangen en er worden geen reserveonderdelen geleverd. Alleen de gehele tank is te koop

[@neilwilkinson7488]

In the UK.. Royal mail use these vans for delivery , constant stop start short journeys, lead to either total Ad blu failure or massive ad blu consumption. ... either way these vans are just not suitable for short journeys .

[@Diagnosedan]

The exhaust needs to be very hot for the AdBlue to vapourize. Sometimes the desired temperatures are not reached.

[@alanmorton1370]

Hi Dan. What a great video and I wish you had posted it a couple of months ago! Had the same problem with my C4 and couldn't reset it on the vehicle. Whilst trying to remove the tank, I managed to break off the nozzle so I had to buy a new one from Ebay. After fitting it still wouldn't work so I ended up having to take it to Citroen who reset it for €49. I will now be looking for some of that additive as well as trying to see if the pump etc are still servicable. May try to 3D print a new nozzle. When researching this fault I also found some articles on failure of the pressure sensor as being the root cause. One guy was able to make an in-line substitute and wire that back into the system from bits off Amazon.

[@Diagnosedan]

That guy is here in the comment section, but there are many more all with different theories😁

[@MichaelVermylen]

In Italie and some other countries (Belgium) there are lawsuits running against PSA.- for this specific problem. They are found liable for this and have to pay custumers back for this cost.

[@Sean_Diagnostics]

In Belgium there is extended warranty on these tank but i do hear dealers are billing customer and asking for warranty so getting double paid or not asking for extended warranty

[@MichaelVermylen]

@@Sean_Diagnostics Test Aankoop is looking to take this to court as far as I know.

[@Diagnosedan]

In Italy they already lost and need to pay for all repairs AdBlue related

[@salimmetin]

I'm not sure if this is a specific problem with PSA, I know some people driving Mercedes or VW, they also have Adblue issues.

[@Rockport1911]

I didnt expect the AdBlue- pump being in the tank itself but the packaging is probably better. What isnt better is probably PSA build quality that made the curcuit board not withstand against the AdBlue and harsh conditions :) Nice fix, even tho it was the expensive route this time around.

[@Diagnosedan]

AdBlue is very corrosive and will destroy electronics. There is not supposed to be any AdBlue where the circuit board is located.

[@jasonvergara7705]

Dan, your videos are the best you retain so much knowledge I wish I could keep half of that

[@Diagnosedan]

Great to hear that you like the videos!

[@fireykev]

Luv this you tube channel, Dan is the man, what makes me laugh is we don't diagnose together, we watch clever Dan do the business

[@Diagnosedan]

🤣🤣

[@superfly2309]

In Croatia we deal with that problem like this: adblue OFF, EGR OFF, DPF OFF, and 20€ in ashtray at technical inspection :D Please next video on bosch edc17c60 ECU problems great video as always, cant wait to get DDTSB this year

[@josepeixoto3384]

20? you're rich in Croatia, here in pos,i mean, portugalia, 5 for that; when the thing is more bad,smoking, leaking,...10 eur@pes

[@Diagnosedan]

DDTSB won't disappoint 😁👍

[@howardbeacon4602]

In the USA we call it( DEF )diesel exhaust fluid, it the same thing. I use hot water to dissolve the dry crystal and when the SCR decomp is clogged with dry DEF crystal I soak it in water to soft it before cleaning it. So next time use warm water to flush the tank out first and if it works drains out the water and add the DEF fluid.

[@Diagnosedan]

Thanks for your comment!

[@kevinsavard5998]

Great diagnosis again Dan. How did the fly taste?😂 Been there too protein the hard way. Isn't it stupid how often there is probably a capacitor shown in the photo that is the failure point on the board. Probably a 6 or 8 Euro part that takes down a rather expensive adblue (AKA Def tank across the pond) tank. My Dad had a 1982 Lincoln Continental had a huge heat sink on the back of the speedometer. It had a PNP transistor 5.00 us dollars at the time fixed it by removing the old one and putting new one in. Ford wanted $430 dollars not including core charge.

[@Diagnosedan]

We see more and more companies that start to repair car electronics again. Electronics used to be a cheap throw away part. But with the rise of EV's and very expensive (HV) components it makes more and more sense to start repairing again.

[@kevinsavard5998]

@@Diagnosedan That's a good thing all the way around. Why have to recycle the plastic tank etc if the heater or electric board fail. More cost effective for the customers the companies that make them and they won't struggle as much to get the raw materials.

[@mikechiodetti4482]

Thank you Dan for this video AND especially the demonstration! I didn't work on vehicles with DEF systems as retirement was in 2016. The L.A. City Fleet I worked in has gasoline, (or Petrol if you wish) CNG and some PRE-DEF diesel vehicles. I've seen some in IATN, but that's it. Your demo was GREAT!

[@Diagnosedan]

I guess in general it's less common in the US as most diesels over there are the Heavy trucks stuff and not the people carriers. I hope you enjoy your retirement, enough time for watching KZbin videos 🤣

[@simplemechanics246]

Another thing is people buy badly stored abblue aka pizz. Almost all petrol stations keep it outside under the sun and all kind of weather. Also the date code is not always visible. It should never over 1 year old

[@Diagnosedan]

Correct storage is important indeed

[@hughneutron5303]

i'm sure you heard this before but dan's the man with the plan

[@Diagnosedan]

😁

[@Bus2000]

Still like to know why the pump isn't energized. Properly the Mosfet circuit switching the pump is damaged. Should be possible to fix.

[@johnnyblue4799]

But then, what fried the Mosfet? I guess it is possible to fix it, but then you need to offer warranty to the customer and depending on how long it takes to fix it, it might not be so cheap either. If it's your own car it makes sense to try and fix it.

[@nesmio7378]

I think the reset procedure wasn't correctly done which didn't get rid of the software block for activation requests - wouldn't have solved the P20E8 as a whole but would have allowed him to activate the pump. Check my other comment about this.

[@Diagnosedan]

Maybe i will take a look in another video

[@Diagnosedan]

​@@nesmio7378was done my friend 😁

[@abteyeb7969]

THINKS PROF YOU GIVE A GOOD LESSON AND YOU SHOW HOW .... GREAT MAN

[@Garth2011]

The Blue DEF should come with that additive in it. People shouldn't have to deal with this crap.

[@robertpsotka3525]

Excellent idea

[@Diagnosedan]

I just learned there are some manufacturers that dont allow the use of this product as it might damage a sensor in the tank.....

[@Garth2011]

@@Diagnosedan Perfect. That tells me they need to recall the sensors or redesign their cluster DEF system so that there is no oxidation happening.

[@themindofthemechanic.2221]

You are very good at what you do Dan. I really enjoy watching your videos. Learn something new every time. You bring honor to our profession my friend.

[@Diagnosedan]

Thank you!

[@Prakicov]

That is the most complicated exhaust system in the world... I`m wondering, can this be case of pre-programmed module failure ?! Really, there is nothing to kill that CB. Pump was not seazed, no water intrusion, no termal exposure. Give me Your opinion about this Dan. Thanks

[@Diagnosedan]

Believe me its not! This one is still pretty Simple. Many people think its pre programmed but to me it doesn't really make sense. They have lost many lawsuits on this system in many countries. In Italy for example they have to fix this for free. Many other countries are following. This is only costing them money, millions even

[@Altair885]

Not usually the pump in the tank that's failed, it's normally the pressure sensor itself but as mentioned you can not take the tank apart to replace it. This is insanely daft as the sensor is a very cheap component and doesn't warrant replacement of an entire tank! The solution is to bypass this sensor and fit a new one externally inline after the tank, this can then be wired into the loom and the system will work once again. It's actually a very cheap fix and worth a go anyway before just handing out a lot of cash for a new tank assembly which might well not be needed.

[@MrEwaldchadauer]

Thanks for the tip. Is there a manual on how to install a sensor?

[@Altair885]

@@MrEwaldchadauer Not aware of any instructions for doing this, but if you have a basic knowledge of how the adblue system works and of vehicle electrics it shouldn't be too hard to fix. Basically you need to find a pressure sensor that has the same range and resistance as the one in the tank. Next you have get hold of a pinout diagram of the plug on the tank so you work out the wiring for the pressure sensor circuit. Once you have these you can insert your new pressure sensor somewhere inline between the adblue tank and the injector, preferably close to the tank as possible. Then you have to disconnect the wiring to the original pressure sensor, and reconnect the wires to the new one. The principle is pretty simple, it's just a bit time consuming finding the correct part and technical info.

[@AdiFury]

Dried adblue crystals are going to be refered to as "white Christmas" from now on.

[@Diagnosedan]

🤣🤣🤣 it did remind me of that🤣

[@christurner913]

Always enjoy the videos, the bloopers make them even better. Hope this finds you and yours well. Cheers from Florida!

[@Diagnosedan]

Thank you Chris

[@unknown476Z]

My God, using vehicle these days is getting ridiculously expensive 😮‍💨

[@Diagnosedan]

Yes it is

[@PSimonsen]

Just had mine changed out. Thank good, it was only 2500€ with parts and labour. It was for a Citroen Jumpy 1,6HDI, but im definately trying the Wynn's stuff. Just to see if i can save another tank replacement.

[@threepotMR2]

PSA with an adblue fault... that means it need an adblue delete so you never have to see that "no start in 900km" message ever ever again 🤣

[@uksomo]

In finland police started to fine for cars with modified ecu programming or exhaust system and fines cap at 30k euros for company cars and some thousands for non commercial used cars and for modified lories they have already checked and fined companies for bypassed emissions systems...

[@pedrodaniellopesferreira2916]

When you have to go to some over engineered solutions like this for emissions, I have to ask : why didn't these car manufacturers went with a bi-fuel solution such as Gasoline/LPG? It would be much, much cheaper

[@Diagnosedan]

Software deletes are worse than robbing a bank over here . I would be carefully with that. Sermi is introduced in Europe and i you advertise with "tuning" you are banned from the OE portals and scantools ect.

[@agoodneighborautorepair2176]

Very nice explanation, electronics don't be exposed close to possible blue fluid...

[@Diagnosedan]

Thanks for watching

[@Rs500ybd]

The Best Pug van ever made was the 205 1.9 XAD Td . i had one as my service Vehicle 409.000 Miles when scrapped ... these new allround vans are Garbage .

[@MrJolly-lb9je]

Yes ! both petrol and diesel XU's where able do a loop around moon and back , diesels used to run on pretty much anything you throw in them cooking oil , heating oil , petrol and diesel mixture siphoned from misfueled customers cars ... 1.9 TD especially was cracking rev happy engine unlike other diesels . Modern diesels and engines in general are ruined by cost cutting , poor metal/material quality (recycled) , loads of plastic parts/components and of course copious amont of electronics . New cars are truly throw away items after 5 year period (when warranty expires) .

[@Diagnosedan]

205 was also a nice car in the normal version. I guess almost everyone must have owned one at some point. They were very popular and they were made for a long time! Maybe its time for a retro model!

[@Rs500ybd]

@@MrJolly-lb9je So Correct The Only Reason They junked it was because the road salt had Rotted out the Beam Carrier Mounts the engine still ran Perfect even with 409.000 miles . i still miss that van 25 years on..

[@MrJolly-lb9je]

@@Diagnosedan Yes ! I have three 205 1.9 GTi's .. driving one as a daily drive for +20 years now :)

[@salimmetin]

I Owned 2.0 hdi (2008), after 420.000 km's it was running perfect.. the only issue was the blocked dpf after 300.000 km's. All the environment protection gadgets, like egr, dpf, adblue etc.. might be good for nature, but it hurts very much your wallet..

[@Meatlove]

Yeah, I have diagnosed more of my fair share of these urea problems. In 90% of all cases, the reservoir has to be replaced or the injector leaks. A problem in the reservoir almost always means an expensive replacement part, which is ridiculously expensive! So when a friend of mine also got this problem on his own car, he was given the opportunity to visit a tuner who disabled the system and gave the engine more power for €500,- and I totally get why he had this done to his car! One spooky urea problem I diagnosed looked like it also was due to the reservoir, thech support then made some suggestions and I ended up replacing the vehicle wiring harness! Still no fix! I decided to be stubborn and took my oscilloscope and measured signals on all components. Long story short, there was a problem in the nox sensor after the urea cat and fap filter causing the CAN signal to drop. Replacing the sensor fixed the issue. I luckily don't work on these French cars anymore.

[@Diagnosedan]

Great find! I've seen similar cases!!

[@GHOOGLEMALE]

I hear that if you just tell the system you have installed a new tank, but still use the old tank, it will work again after it has reset its countdown.

[@Diagnosedan]

Not if it is broken. In many countries they lost lawsuits over this and the need to repair it for free.( In Italy they need to repair the AdBlue system for free) In many cases that means replacing the tank. This is costing them millions, i dont think they would do this if it was just a simple reset. You might be referring to another problem

[@GHOOGLEMALE]

@@Diagnosedan Indeed, yes it must be working but the point I am making is that these are timed to fail at a certain Km - ie there is nothing wrong with the unit but it is programmed to stop working. An example can be seen here - at 3.08 to get to the point. kzbin.info/www/bejne/iKexY32lhNZqrLc Same but different?? thats double dutch but you should be ok with that Dan 🤣

[@MVG1982]

It can also be software related. You can update the older tanks separately from the car via your PC. You can do the newer ones by updating the engine computer. I've had it happen a few times that it helped because something went wrong with the software on the circuit board.

[@Diagnosedan]

Thanks for the feedback!

[@gertjan0089]

You can also delete the AdBlue from your car and plant 3 trees for compasation!

[@Scouter98]

And then have your vehicle registration nullified for tampering with emissions equipment! Yay! I'm sure those greedy car makers put thousands of € worth of kit on your car just by mistake, right?

[@Diagnosedan]

🤣🤣👍

[@rambo77x7]

Hi mate great video , very in depth and informative as my van has just come up with this code , ive done a forced regen wittch worked a couple of days later the engine light came back on , i am going to try a flush first and check the injector as this is a fairly cheap fix , if not i will have to look ate the adblue tank thanks for help Cheers

[@CrazyPetez]

Another example of government bureaucrats designing systems for our cars. Get the damned government out of car & truck design.

[@Diagnosedan]

Thanks for watching

[@ibmezouar]

Dan we missed your videos, always a joy to watch! Great job!

[@Diagnosedan]

Missed you to😂

[@JohnSmith-wb6kq]

Great Video Dan, salty water (adblue) and exposed circuit boards sound like a dream match hahaha

[@Diagnosedan]

Match made in heaven 🤣

[@garethedwards2883]

Thanks Dan for another great video and for leaving your mistake in which shows how genuine you are 👍

[@Diagnosedan]

😁🤣👍

[@kendom33]

Great video Dan. Im only a petrol (or diesel) head. Really interesting to discover how this works. Thank you for taking the time to do this. Bloopers If you ever give up engineering , you could do voice overs for Warner Brothers 😅😊

[@Diagnosedan]

🤣🤣 Thanks for the great comment!

[@dustcommander100]

Amazing how complex this system is! Is running diesel really worth the effort? It must be really efficient! Great diagnosis, and I can tell a lot of extra effort went into setting up and documenting the tests. Bravo!

[@Diagnosedan]

They are quite fuel efficient and they are pretty strong. Its all the emission stuff that makes them unreliable

[@GTP_1984]

Great video. Come on I dont want bloopers. This man is a professional!

[@Diagnosedan]

You can stop the video before the bloopers😂

[@TheWaelabo02]

Thank you so much , I had a similar problem for Mack truck volvo engine , I do not expected over charge alternator cause pressure code . 😅

[@Diagnosedan]

🤣🤣

[@TricksoftheTradeAutoRepairs]

Loved the Bloopers. Thanks for being human.

[@charlescoulson]

The first video I have seen explores the stupidity of the whole adblue system. Having just had the problem and found most garages totally incapable of understanding the system I now feel I now know more than the average fitter. In the UK the immediate response is change the Adblue tank.

[@justinmijnbuis]

Great video Dan! if this failure mode (PCB) is common, it might be worthwhile for someone to offer a repair service. Electronic-wise it's probably not that complicated.

[@Diagnosedan]

Yes it could be.

[@ahmadhassounmusic6053]

Respect Dan I hope i can come and visit you this Fall Greetings from Oberhausen Germany ❤

[@Diagnosedan]

Thanks for watching

[@davidl.leggate8186]

😊😊😊😊😊😊😊😊😊😊😊 thank you very much Dan for another wonderful video and all the information and details that you put into all your videos. Thank you very much 10 out of 10. I’m from the United States.😊😊😊😊😊😊😊😊😊

[@Diagnosedan]

You made my day! Thank you very much, its really appreciated

[@rrmech11]

Dan Very interesting and understandable. Your the Man. Always enjoyed your interpretation.

[@Diagnosedan]

Thank you

[@shaunmaxwell2745]

Love these episodes! Too far between but I’ll take some instead of none!

[@Diagnosedan]

😁👍

[@abdulh9687]

Hi Dan, I have been watching your videos from the very beginning and love them. I have learned a lot from you. I have an f10 BMW 520i and I am struggling to find a fix for my parking sensors. All 8 do not work and there is a message on the dash board saying PDC failure. I have taken the car to many garages and no one has been able to fix it. A control module was replaced under the glovebox and still no fix. I would be willing to bring me car from the UK to your workshop just because i know if you look at it, it will get fixed. You can also do a video on it if you wish. Let me know if you're interested. Also I love DDTSB, it's the best thing every for a workshop and a clever idea!

[@Diagnosedan]

Thanks for your great message. I can't believe they are not able to fix your issue locally. The Pdc system is a very simple system with a control module, distance sensors and a speaker......not much options for failure. If you send me a mail with your exact location i might direct you to a workshop thats able to solve your issue in your general location

[@sollykhan2385]

OMG this was so funny, Dan, it reminded me of the old days when i use to watch 'Jim Carry ' ( The Mask, Ace ventura pet detective, Dumb and dumber etc ) with all his films and out takes bloopers!! Thanks for this great video, that pump in the tank looks really cheap and nasty, they must have picked them all up from a scrap yard of old cars windscreen pumps!! 🙂

[@Diagnosedan]

🤣🤣

[@sollykhan2385]

@@Diagnosedan 😇

[@anthonydelcorso4246]

Your amazing - love your channel I use windshield washer fluid to clean Adblue crystals works great! Ill let you know how the tank fix goes I'm in the USA saving to join the DDTSB

[@Diagnosedan]

Thanks for the great feedback. I dont recommend DDTSB in the USA as it was made for the European market. No information on US made vehicles

[@Brian_L_5168]

That adblue crystal looks like early stage kidney stone! You are indeed a car doctor, making diagnosis based on evidence & science 💯 👍

[@Diagnosedan]

I have a small one and i'm always afraid it one day decides to come out 😅 ( And when i say i have a small one i'm talking about the kidney stone😂)

[@robertwalker1742]

I’m from UK, and own a Volvo b4 with ad blu, and I have started to use that Wynns product Dan better prevent than fix amigo.

[@Diagnosedan]

I guess it doesn't hurt😉

[@christophermarshall5765]

I recently replaced the fuel filter in a 9N Polo. Prior to this, I checked the fuel pressure. With the engine running, the pressure gauge needle is supposed to be stable. Not this one. That gauge needle was bouncing so fast, I couldn’t get an accurate measurement. Replaced the filter, and problem fixed. The car used to intermittently stall for no reason. For the viewers who are having stalling issues with their VW 9N polo cars, check the fuel pressure first. If that needle bounces at a rapid rate, change the filter. The reason is that the pressure regulator is built into the fuel filter in these cars.

[@Diagnosedan]

I had to diagnose one of these cars once that was running poorly after replacing that filter. Turns out there are different types of regulators available. ( Different pressures) So you need to be sure to install the right filter

[@christophermarshall5765]

@@Diagnosedan The 9N polo 1.4 runs fuel pressure of 2.5 bar. Old school is about 37 psi.

[@crwhelan87]

Very informative. Good thorough diagnosis. Good work Dan!

[@Diagnosedan]

Thanks!

[@liljakdavis23]

Absolutely fantastic video here Dan .. LOVE the bloopers too😂😂

[@Diagnosedan]

Thats so nice to hear! Thank you very much

[@hamzasalim2513]

Thnx brother you make the difficult easy in your videos 🎉🎉❤❤

[@Diagnosedan]

😁😁

[@Sash_YT]

Awesome fix and explanation as always, but the bloopers this time were even better. :)

[@Diagnosedan]

And there were many🤣

[@JH-bw7lp]

Refreshingly honest and practical video review, Thankyou.

[@Diagnosedan]

Thank you very much

[@ilanamar10]

I'm always waiting to new video diagnostic from Dan . You are great .

[@Diagnosedan]

Thanks!!

[@thepharcyde8285]

Hi Dan I got exactly the same issue on my company van however as you said it is related with the Nox below treshold and it won't crank once the fault appears and van gets switched off. Absolute nightmare- it has been in 3 garages about 7 times now. Main dealer has suggested injectors which is a scam as the van is on 50k miles and it runs fine. So far garages has replaced and flushed multiple times - addblue injector, addblue tank (plus the pump). Fault gets cleared everytime with scan tool like yours which tells the Ecu that the fault part has been replaced. Fault reappears after 300 miles. I poured also the anti crystal thing from Wynn in addblue tank as well as dpf cleaner (in fuel tank obviously). Now it's been back after software update so hopefully that will be the end of it. My previous berlingo has done 140k miles and never missed a beat. If it was my personal vehicle would have gone to a tuner to remove the bloody thing from the ECU. It a shame as the van is much better value compared to caddy and has got very smooth drive with auto gearbox.

[@josepeixoto3384]

very easy to delete, my daughter had the adblue injector stick open,on the highway, WHITE shit and smoke all over the rear of the car , traffic staying back 100 meters; when the adblue ran out, no more smoke, she made it home ok; i called a friend who knows a special engineer in a small shop, special price for me, an ex-mechanic, 100 euros, half an hour, done; 2 years ago, perfect still, of course,dead and buried, deep...them lawmakesr in Brussels who MADE the law, should PAY...

[@Diagnosedan]

Where are you located? Send me a mail on [e-mail] if the problem is still not solved. Maybe i know a specialist in your Area

[@bertiethomas960]

Great video Dan and a great breakdown of the operation of the system....Thanks very much for sharing this with us.....cheers

[@Diagnosedan]

Thanks for your comment!!

[@GrahamHenderson25x]

in depth analysis excellent subscribed ✔️

[@Diagnosedan]

Thanks for subscribing!

[@peterstorm4195]

As usual nice video. ADblue is probably something that is very expensive when something goes wrong. But well done as usual. 😀💪

[@Diagnosedan]

Most components are not cheap Indeed. Thats why its important to perform a thorough diagnosis to make sure no expensive parts get replaced that didn't need to be replaced

[@avtoblog_Togrul]

hello i am writing to you from azerbaijan. first of all thanks for such informative videos. i have a question for you. i have a kia sportage 2009 2.0 diesel (d4ea). when starting the car from cold the number of cycles is always 720. never a high cycle count. i have checked everything. the pump pressure is 30 bar, and the temperature sensor is working slowly. why are there no heating periods in the cold