Member
Hello guys! I own an E90 320i, with catalytic converter CEL, but I believe it's related to a bad injector or something else. Car runs fine, no smoke, stable idle but the injector corrections and short term fuel trim indicates running lean, as I understand. I also suspect a vacuum leak because when I start the engine I can hear hiss from somewhere in the engine bay (ccv?) Could someone help me with these livestream values of the o2 sensors) and hint me on where to start?
https://youtu.be/NiTs9RR5CV4
https://ibb.co/2gWjPD0
https://ibb.co/0BbcmYS
https://ibb.co/XyPH6VW
https://ibb.co/5sTkpZC
https://ibb.co/YLw5kZQ
Last edited by nicoaraalex; 05-31-2020 at 05:41 PM.
Wagon meister :)
BMW Tech Expert
So what are the codes?
Everything I see with INPA is okay, nothing wrong IMO. As for the last screen shot, yes it looks a tad high on the oxygen sensor, however what is the temperature of the car? If that's right after start-up or within 5 minutes, that would be normal.
If you think you do have a vacuum leak, the best way is to get the intake smoke tested.
Darin
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M-Flight Member
Member
The screens were made after a 25min drive, coolant temperature was 105 C. Codes are catalytic converter efficiency below threshold, i believe this is because of a rich running, as the downstream o2 sensors sit at 0.7v and ...cylinder 4 seems clogged?
Is Enabled
BMW Tech Expert
What are the codes? What does the ISTA test plan say?
Those learned adaptations are not very significant as they are quite minor.
-Abel
- E36 328is ~210-220whp: Lots of Mods.
- 2000 Z3: Many Mods.
- 2003 VW Jetta TDI Manual 47-50mpg
- 1999 S52 Estoril M Coupe
- 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
- 2019 M2 Competition, self-tuned, 504whp
- 2016 Mini Cooper S
Member
Catalytic conversion 29F5, 29f4
Member
Post 02 sensor should read 650-700mv at normal operating temp. if it fluctuates doping down and mirroring, your cat is done. Your lamda 1 and 2 should be the same so something is off on those readings.
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