Quote:
Originally Posted by mtthmpsn
Sorry, I don't recall the code exactly. I don't always trust my OBD II reader code, so use INPA and my laptop to read the errors and it was pretty clear it was the pre-cat bank 2 O2 sensor out of range (after German-to-English translation in Google). Since I haven't seen the SES light since the fix, I think INPA was right - just coincidental I guess that my mpg seemed to drop after the repair.
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Being out of range usually doesn't mean lambda is the culprit. You could have problem elsewhere. Maf related as I had (aftermarket maf did not work properly)... And many more. With new lambdas it might take sometime to problem occur again.
I also had some vaccuum leaks.
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Current rides: E65 730d, F10 520d, E34 520i
BMW glasses on since 2004.
Last edited by zener; 01-26-2022 at 12:37 PM.
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