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      01-16-2013, 12:33 AM   #21
96LTWM3
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Drives: S54 E36 ///M3 08' E92 M3
Join Date: Oct 2011
Location: Dublin CA

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Quote:
Originally Posted by Mike Benvo View Post
274B - P2629:
Oxygen sensor pump current calibration fault before cat. converter, bank 2
O2 Sensor Pumping Current Trim Circuit/Open (Bank 2 Sensor 1)

Oxygen sensor is available, oxygen sensor voltage > 4951
mV (K_LAVK_OBD_SA_DIAG_OL)

Looks like that sensor is damaged. Replace it and you should be fine. This is a pre cat sensor so it's much more important than a post cat sensor.


As far as the secondary air system, this is for emissions only. Doesn't have to do with post cat o2 sensor. Secondary air system pumps fresh air into the heads to warm up the cats faster on cold start. Replace the faulting o2 sensor first and let me know if this one comes back.
Thanks Mike I will report back once I get it changed, the car has become my weekend car now so hopefully ill get to it sooner then later
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