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-   -   What do I check next? (http://forum.e46fanatics.com/showthread.php?t=851437)

aphhpa 06-17-2011 03:43 PM

What do I check next?
I've had "oxygen sensor adaption limitation" in all cylinders for more than a year. Ive replaced disa, maf,, lower and upper intake boots. The car randomly performs bad. Like sometimes it is just awfly slow, other times it's okay. It's gradually getting worse. I'm
Leaning towards my u2 sensors or icv next. Suggestions?

Mango 06-17-2011 03:44 PM

sooo you've replaced everything except the part named in the code?

Zchild 06-17-2011 04:03 PM

I would suggest you replace the O2 sensors pre-cat which is the easy possibility but it sounds more like your Crankcase Vent Valves (CVV) hoses are probably cracked and need replacement. I had some of the same symptoms and it turned out to be my CVV hoses. Just my two and a half cents worth...

aphhpa 06-17-2011 04:21 PM

I didn't think the oil separator had much to do with oxygen sensors. I had work done on my oil separator from BMW since the codes started more than a year ago. I think they would have caught it, or I'd like
To think so.

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