NoX Sensor? S350 2012

[MartynKy]

Hi, my car has the warning “ check adblue, engine not start in XXX miles”
Going by people’s experience if I change both the nox sensors should this fix the problem?

A few people have mentioned remapping it to remove the adblue but I normally like to fix a problem rather than override it.

Any advice would be great thank you!

 

[Slartibartfast]

Hi, my car has the warning “ check adblue, engine not start in XXX miles”
Going by people’s experience if I change both the nox sensors should this fix the problem?

A few people have mentioned remapping it to remove the adblue but I normally like to fix a problem rather than override it.

Any advice would be great thank you!
View attachment 139221

It may be either or both Nox sensors or it may be an adblue fault (tank, heater, crystallisation of adblue, adblue control unit etc).
Best to get a local MB specialist to check it out on Star, or nearest main MB dealer.

 

[Slartibartfast]

Remapping adblue out is an option but not strictly legal for road use and may invalidate insurance. I don't think anyone has ever been caught out for doing this but just making you aware

 

[Sisters]

There's a shortage of sensors/3 month-ish waiting list. You'll need to get Engine management light off and I'm not sure if Mercedes Star diagnostics will be required no that your car has given you the 500 miles until it wont start warning.
Ideally, get the whole NOx sensor delete done. I've shelled out £1400 on sensors which became troublesome in only about 8 months. Replaced free of charge/woranty, and now same thing has happend today. Hopefully still under waranty.

 

[Mbtech42long]

Nox sensors won't fix the issue I'm afraid. The first 3 codes state the CAN signal is missing which will trigger the eml and countdown. You need to get the can lines checked and resolve the communication issue

 

[rf065]

A few people have mentioned remapping it to remove the adblue but I normally like to fix a problem rather than override it.

Adblue will overide you no matter how much you spend trying to fix it, getting rid of it will save you thousands!