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      01-14-2013, 10:38 PM   #15
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Drives: 96' S54 E36 ///M3 17' M2
Join Date: Oct 2011
Location: Dublin CA

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Originally Posted by pbonsalb

If it is a post cat 02 then it will have no effect on performance. If it is a pre cat 02, it likely would have an effect on performance. Pull the code(s) to find out which 02 and what the CEL is for.
o2 sensor pumping current trim circuit/open.

Secondary air injection system insufficient.
I cleared them twice and the same ones came back.
Like Mike said, its probably a bad o2, but how can I tell which one based on these codes? Does "Secondary" refer to post cat? Is there a different part number for post and pre o2? Im going to call my SA tomorrow to order the part, he can get it to me at his cost. Im assuming changing an o2 should be pretty simple.
*1996 S54 E36 M3* 2017 F87 M2
Sold: 07' e90 335i, 08' e92 M3