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N53, 530i, 2007 ECE spec (replaced the nox sensor 2 years ago, for "new" OEM
I recently got the 30E9 code (NOx cat ageing) and read pretty much everything on bimmerprofs and i did some tests.
during those tests i got some (imo) weird data. the : schubabschaltung" (circle 3) was at !18 ppm, when the engine/exhaust were on temperature, but further on in the test drive it went to 0ppm and stayed on 0, while the other values were still being updated.
what could be the cause of this? a filthy/clogged/broken sensor or something?
08-26-2022, 08:47 AM
30E9 nox aging
