Quote:
Originally Posted by Will_460cs
The nox sensor is after the nox cat, so the assumption is not accurate I'm afraid
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Then it means that nox sensor really monitors efficiency of the cat and explains why new oem sensor with old nox cat show very wide range of ppm values; while noxem with only bosch wideband probe has rather restricted range of values because it does not measure actual nox concentartion...
Interesting experiment would be to connect bosch wideband probe to oem nox unit (where the nox head already died)...if the output signals of ngk nox probe and bosch wideband probe were similar it might work...but it would be too simple as I guess that bosch probe has a different output which is then "corrected" in the analogue part of nox unit...while digital parts (those reporting to ecu via canbus) are probably very same in oem nox and noxem...