where nox sensor connected to？

[tanghz]

MB vito 114 CDI w447 18reg. does anyone know which unit the NOx sensor connected to? the engine ECU or the adblue CU? technician found no voltages on upstream NOx sensor. I hope to solve it myself if it's not so hard. cheers

 

[Wighty]

MB vito 114 CDI w447 18reg. does anyone know which unit the NOx sensor connected to? the engine ECU or the adblue CU? technician found no voltages on upstream NOx sensor. I hope to solve it myself if it's not so hard. cheers

Does that mean you have the “Adblue will stop working countdown “ ?

 

[tanghz]

yes. it's been reset by dealer. NOx sensor been changed as well. but the problem seems coming back again

 

[Slartibardfast1]

yes. it's been reset by dealer. NOx sensor been changed as well. but the problem seems coming back again

There are 2 Nox sensors and when 1 fails the other normally fails shortly after (days, weeks maybe months)

 

[ajlsl600]

Then why are they not marketed as pairs after all one can't get adblue pts in tank without buying whole tank. Or until recently one cud not.