E46Fanatics - View Single Post - Non continuous OBD monitors won't set
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Old 11-22-2012, 08:01 PM   #12
Registered User
Join Date: Nov 2012
Location: WNY
Posts: 34
My Ride: 02 325i
Gathered some data while idling in my driveway. With ignition in on position and car not running, all o2 sensors read a steady .4v
Once up to temp idling, both primary sensors oscillate between .1v & .7/.8v
Post cat o2 sensors read as follows:
bank 1: Steady .7v
bank 2: Bounces between .4v - .5v
Fuel trims maintain between (-)1.5% - 2%

Any ideas on interpreting this data?
I do have a very slight exhaust leak at the header/resonator interface btw

Last edited by jessehell; 11-22-2012 at 08:07 PM.
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