Nox sensor gone again - Advice

[Zolly]

Hi I am after some advice please

I had. P2000 Nox Bank 1 error which I couldn’t clear down and bought the new part direct from MB Manchester ( ridiculous price for a probe)

However less than 6 months later the same error has appeared and the management light obviously comes on. Is this a common fault - luckily I only have one fitted - could have been worse with 2., Can the probe be cleaned or is a simple fail or not were this part is concerned , is there anything else to check to make sure it’s not just a simple fix ?


The thing is whilst I bought the part from MB I didn’t get them to fit as I always use a local garage. Obviously the part will come under warranty, but I can see this becoming a messy situation . In that MB will want the part back before they credit me , which means I have to get someone to take it out and then I will need to pay for another and have that put in .

I live miles away from the nearest MB - Manchester and it’s going to be a real pain. I could pay for another unit and have it fitted by local garage and then take the old one back .. What do MB do with situations line this are they a nightmare to deal with or are they pretty much OK ?

Your advice would be appreciated

 

[ajlsl600]

Unless pt damaged should come under warranty.unless they can prove another issue with yr car screwed it up.nox sensors (and others) are a constant complaint on here benz might one day we hope ? Organise them to be reliable.
Myself I voting with my feet and wallet.next motor wont be having them and most likely not a benz,or at least nothing modern. Emissions related stuff on benz (maybe all makers ) is,in europe anyway ,in my view just a sanctioned rip off .but then I am a well known cynic....

 

[Botus]

plenty of posts,

highly likely you got v2 sensors, not the last working v3.
Unless an online, full on Indy who reads and remembers all his tips docs - he won't know the correct fix or have the ability to flash the right software

dependant upon the car the correct fix can be to move to v3 NOx sensors - which requires these 3 software updates,

a) updated part list for your car - so they show and thus sell you v3 parts
b) adaption wipe and reflash of the SCR
c) adaption wipe and reflash of the engine ECU

will be interesting how this goes with warranty claim on 6 month old sensors

check for emission recall.... it should all fit together if your car uses v3 sensors its the ONLY way to move past the recurring joke u have now - where "an accidental software bug" causes the fun and the visits to the garage

This online tool enables you to check if your vehicle is affected by any of the following three measures:

• Diesel software update
• Refrigerant changeover
• Takata airbags

https://www.mercedes-benz.co.uk/passengercars/being-an-owner/total-recall/recall.module.html

 

[ajlsl600]

I used that .seems my my Ml not subject to any of these.?? Does not say if or not it was done before i bought car? Am I to assume I am not effected ? And why would that be.? I do know that the whole adblue system tank.pump ect was replaced .I have the receipts.

 

[Botus]

bugs out there we know about and then which they have resolved is not clear
few manufacturers let on what's happening....

its most likely the issues afflicts later cars as the emission stds they had to meet was far higher

 

[bladecrazy]

absolutly right there are 2, fit as a pair then update to latest software to match, fitting one wont work because the new software isnt compatable with the old snsor.

 

[bladecrazy]

well put my vin in and my car is on for the update, guess that ship has sailed

 

[ajlsl600]

Dont think it ever sails,
but there is divided opinions on the wisdom of having it,the updates. If they are changing the sensors foc at same time I might be inclined. As is now I would give a wide birth and try not to walk into a headache. Some have no post update issues a good number have.
In case of op.there is likely no choice,as posted by others proper sensors,pairs at££££,s wont behave without update and like it or not everything else gets updated at the same time the cynic in me says that I have no problem with the idea we may also become canaries for other benz data harvesting and software experiments at the same time...
Remember this is same outfit that organised software to get eml to come on for no reason!!!.

 

[M80]

Hi I am after some advice please

I had. P2000 Nox Bank 1 error which I couldn’t clear down and bought the new part direct from MB Manchester ( ridiculous price for a probe)

However less than 6 months later the same error has appeared and the management light obviously comes on. Is this a common fault - luckily I only have one fitted - could have been worse with 2., Can the probe be cleaned or is a simple fail or not were this part is concerned , is there anything else to check to make sure it’s not just a simple fix ?


The thing is whilst I bought the part from MB I didn’t get them to fit as I always use a local garage. Obviously the part will come under warranty, but I can see this becoming a messy situation . In that MB will want the part back before they credit me , which means I have to get someone to take it out and then I will need to pay for another and have that put in .

I live miles away from the nearest MB - Manchester and it’s going to be a real pain. I could pay for another unit and have it fitted by local garage and then take the old one back .. What do MB do with situations line this are they a nightmare to deal with or are they pretty much OK ?

Your advice would be appreciated

Doesn't the MB warranty on parts cover this for 2 years?
I'm led to believe that if the vehicle is returned to MB they will diagnose and replace free if the part has failed.
I guess the risk is that they say it was something else and charge for diagnostics, at least.

Assuming they don't accidentally create more revenue by their diagnosis you would at least know where you stand.

 

[Zolly]

Doesn't the MB warranty on parts cover this for 2 years?
I'm led to believe that if the vehicle is returned to MB they will diagnose and replace free if the part has failed.
I guess the risk is that they say it was something else and charge for diagnostics, at least.

Assuming they don't accidentally create more revenue by their diagnosis you would at least know where you stand.

So your advice would be to take a punt at speaking to MB first .. explain situation and see what they say.. If I go down this route it’s going to be time consuming and I may not get the answer I want.

As for flashing and V3 surely MB must be aware of this issue and not just palm a very expensive piece of *++ off on the customer As mentioned you would never know that there are issues never mind what to look for

My car is a 2015 petrol with only one sensor fitted as standard-

 

[Botus]

they all have one goal to extract as much money as possible from customers and keep you in the dark. in-between that activity you have warranties and certain consumer rights, but all car manu in UK have always avoided all that cost and complexity by just telling people to go away (there's no difference here between Merc or any other car manu peddling their wares in the UK)..

the Merc tractors affected, were built with a fragile and possibly designed in hardware and software failure modes that mainly come to light outside warranty (in years 4 to 5). Then we had "other oddities inside the engine ECU software" that show up re an outside temperature bug, and then the emission scandal

ALL three issues need fixing but its not one thing, its a batch of rectification work all the cars need. And, Yes if the world was right, it would be free for all owners... and any engine sensor replacement, software updates, DPF, Ad-blue or NOx work paid for by the customer should be reimbursed. BUT IT'S NEVER GOING TO HAPPEN IN THE UK, because we are all lemmings that just take it.

NOx fix with mk2 sensors was an attempt over original poor design where they hoped to resolve using a small update to the sensors, it kept the light off for a short time and then played up just like the originals - the final fix was a big redesign of the system with Mk3 sensors and lots of software changes across multiple modules

Oddities in the engine map, are unexplained strangeness they will not own up to. But I believe was a subversive engineer trying to spill the beans on emission scandal with a time induced bug that set off the engine light but did little else. Possibly set to go off after he retired or just a few years down the road so they don't join up the dots up.

And then more recently the EU mandated emission fix to get it to meet original homologation regs (that it was sold as meeting from birth). We are seeing many pop up here just after the emission update with a NOx sensor problems. Which is hardly surprising as no one sensible is going to write an new engine map for a 6 month window where a few car's have the wrong parts fitted (with mk2 sensors and emission fix map). The manufacturer will just create one correct spec Map that needs all elements of the car's emission system to work reliably so the cars are now legal and everything works adequately - which in my world means they all need mk3 sensors with the ad- blue SCR update and the legal engine map.