adblue ecu faulty or not

[w213probs]

Hello,

As you all know by now that i have been doing a lot of research on the adblue system for w213.

One of the things which is very less talked about is the ECU. Did not find anything about the ECU going bad.

What are the chances that a bad ECU can lead to adblue pump fault or general malfunction of the adblue system?

Any experiences to share? and how can a faulty ECU be diagnosed?

e.g. new pump fitted but not working? adblue sensor not showing right fluid reading or etc.

thanks.

 

[ajlsl600]

Frankly.. I have had issues with mb adblue, despite it being replaced in its entirity just before my purchase it cost £1200!!
A Yr ago it started playing up, eml ect and 500 to go before no start
I read up on the matter, dosing pump, injector, heater disastrous nox story , I tried the medicine in the adblue, I tried removing, replacing fluid, after much research I decided maker has not solved the issue, that costs £1000,s and would likely be an ongoing headache, that selling and taking a kick in the bxlls was not an attractive option so I had that, adblue and EGR deleted.
And yes had I had all the info prior to purchase, I would not have bought it, a fact I am SURE benz knew all about, I feel the maker has been quite decietful over all related to adblue and nox sensors.
A system benz USA have been forced to resolve but benz UK remain legally permitted to screw us over about, that in basic terms is why I went the delete route
I would consider biting the bullet on a fix, if I knew maker had to cover its failure as per USA until then f em.

 

[w213probs]

Frankly.. I have had issues with mb adblue, despite it being replaced in its entirity just before my purchase it cost £1200!!
A Yr ago it started playing up, eml ect and 500 to go before no start
I read up on the matter, dosing pump, injector, heater disastrous nox story , I tried the medicine in the adblue, I tried removing, replacing fluid, after much research I decided maker has not solved the issue, that costs £1000,s and would likely be an ongoing headache, that selling and taking a kick in the bxlls was not an attractive option so I had that, adblue and EGR deleted.
And yes had I had all the info prior to purchase, I would not have bought it, a fact I am SURE benz knew all about, I feel the maker has been quite decietful over all related to adblue and nox sensors.
A system benz USA have been forced to resolve but benz UK remain legally permitted to screw us over about, that in basic terms is why I went the delete route
I would consider biting the bullet on a fix, if I knew maker had to cover its failure as per USA until then f em.

100% agree with you. all the readings i have been doing. it is not just MB but all other manufacturers as well. wherever there is adblue, there is issue.

People who want to stay on the right side of the law, it is so expensive.

deleting adblue - couple of hundred £££s
new tank - ££££s plus labour to fix around £15-800s
used tank - hard to find and no guarantee if it will work and not throw problems agains.
repair - very hard, and complex so people avoid talking about it.

 

[Steve@Avantgarde]

As I wrote in another thread, the main issues we have, Nox sensors aside, is crystalisation of the Adblue itself which causes blockages to the metering valves, which can then strain the pumps, or burn out the heating lines.

Yes we have also seen ECU issues. We have one here this morning where the metering valve jammed, it burnt the heating line in the tank and back fed up to the ECU.

They arent hard systems to understand, repair or replace for the professional. Like anything you need the correct knowledge, the correct diagnosis equipment and then apply it to your faults. It's only expensive if you have been very unlucky or you have a guess work approach to the fault.

If the anticrystalisation additives were used to each adblue fill, very few would have any problems.

Deleting the system is not the answer. It's an illegal process which will come back to bite in the end, as many customers have already found out.

 

[w213probs]

As I wrote in another thread, the main issues we have, Nox sensors aside, is crystalisation of the Adblue itself which causes blockages to the metering valves, which can then strain the pumps, or burn out the heating lines.

Yes we have also seen ECU issues. We have one here this morning where the metering valve jammed, it burnt the heating line in the tank and back fed up to the ECU.

They arent hard systems to understand, repair or replace for the professional. Like anything you need the correct knowledge, the correct diagnosis equipment and then apply it to your faults. It's only expensive if you have been very unlucky or you have a guess work approach to the fault.

If the anticrystalisation additives were used to each adblue fill, very few would have any problems.

Deleting the system is not the answer. It's an illegal process which will come back to bite in the end, as many customers have already found out.

great info Steve, thank you for sharing the experience.

For e.g. how would one know if an ECU is gone? actuation of the pump fails, even though the pump is working. pump working when installed and then fails again?

sorry to ask, very little information available online around the ECU and metering valve.

 

[Steve@Avantgarde]

All ECUs are fed from either the pre-fuse box or main main boxes. It's a case of carrying out step by step guided diagnosis using Xentry.

If you have any component not working the first thing you check is live and earth. If they are present, you know you are looking at a component failure. If nither live nor earth are present you either have a wiring break or supply fault.

 

[ajlsl600]

As I wrote in another thread, the main issues we have, Nox sensors aside, is crystalisation of the Adblue itself which causes blockages to the metering valves, which can then strain the pumps, or burn out the heating lines.

Yes we have also seen ECU issues. We have one here this morning where the metering valve jammed, it burnt the heating line in the tank and back fed up to the ECU.

They arent hard systems to understand, repair or replace for the professional. Like anything you need the correct knowledge, the correct diagnosis equipment and then apply it to your faults. It's only expensive if you have been very unlucky or you have a guess work approach to the fault.

If the anticrystalisation additives were used to each adblue fill, very few would have any problems.

Deleting the system is not the answer. It's an illegal process which will come back to bite in the end, as many customers have already found out.

The guy who did mine says he still has origional info? That being the case I will collect it in march.
I will then interview the system. If I find any blockage that I can clear I may try again. Tho I am not optomistic it will be that simple. The addative did nothing for my system. Maybe it was already blocked, maybe its a completely different issue. Whatever I sure won't be parting with 1200 to, maybe fix it for who knows how long!!!
Maker shud be forced to recall all adblue and ensure they are working OK. Then provide a warranty on the system as in USA from there owners shud be able to keep system running OK.
Me I don't try to avoid maintainance, I just won't be a lemming and get repeatedly mugged by maker. The fact that this effects other makes is interesting, but irrelevant as I don't, yet own another modern make and nor ever will I.... Reluctantly I prob end up running this one to a standstill. Then look simpler old car. Thing with this modern shxte running to a standstill. 5 days, weeks yrs, who knows, what I do know , 41 yrs of motor and plant trade, is nothing modern, electronic is really reliable, and nothing modern is a cheap or simple fix . Absolutely designed to be the exact opposite.

 

[Steve@Avantgarde]

Why should it be a recall? It's not a safety related defect.

The additive will do something but its not like a drain unblocker which will disolve whatever has crystalised already, and as you say, the damage could already have been done.

 

[ajlsl600]

My view ref recall is. Its a well known fact that its a defective system opinion vindicated by authorities around the world where benz are and have been held to account. Miss sold. Various legal actions pending. 3 or more updates 3 or more nox sensor variants pretty much illuminates the real situation. Strange thing is calls to 3 dealers have returned as no updates required and no recalls on emissions kit on. My wdc166004.
Frankly I don't know if that's fact or fiction

 

[Steve@Avantgarde]

A recall is only given on the grounds of safety compromise.

If a maunufacturering defect is causing multiple failures it and it can be proven that it is manufacturing is the defect but one which doesnt compromise safety then that is subject to Warranty goodwill.

 

[malcolm E53 AMG]

The problem we have in the UK is that all lawyers are chasing civil rights causes and no one is protecting the consumer in this case the vehicle owner, class actions need state backing to be successful and this is sadly lacking in the EU unlike the US - I voted with my feet and own two petrol cars I miss the low down torque of derv but that’s all