N0x sensor help!

[Gordon brownlie]

Hi I have a e220 bluetec 2016 55000 miles..I had a faulty nox sensor this was diagnosed at my local mot garage as I was just out of warranty..Garage then ordered me a new sensor this was a Bosch sensor but after it was fitted the elm wouldn’t go off and it was bringing up a new code on the diagnostics...I now have 1 code that reads (comparison signal is faulty) the guy at the garage said he is unsure and thinks maybe I need to fit a genuine Mercedes sensor,as the car can’t read signal from a Bosch part is there any truth in this and does anyone have any idea how to fix this problem cheers

 

[alexanderfoti]

Some cars need. Software update AND the latest updated part number from MB

 

[star]

http://forums.mercedesclub.org.uk/i...r-faulty-pos-known-fault.172568/#post-1676863

Check this thread out, in this case we saved the op a fair bit of money.

 

[John Laidlaw]

Welcome Gordon- help has come your way already!

 

[Srdl]

Hi Gordon and welcome to the forum. Presumably yours is not a 2016 or it should still be under warranty?

Often, this sort of thing is best dealt with by a Mercedes Independent garage who have both the experience and equipment to solve problems like this. Let us know where you are and someone may well be able to recommend a place local to you.