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General E46 Forum
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Old 08-23-2012, 03:20 PM   #1
gbajwa
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Join Date: Jul 2012
Location: Vancouver, Canada
Posts: 6
My Ride: 2000 323Ci
Exclamation Idle Issues on start-up and have codes. Please Help!!!

So i have an issue with my 2000 323Ci.
The car once in a while idles a little odd (goes up and down but has yet to stall)
However driving it for a couple minutes it is alright
But it does not happen all the time but i would like the fix it before it becomes any worse.

I get the following codes.

E3/B1 - Ox.-s.control deviation, bank 1, too large
E4/B1 - Ox.-s.control deviation, bank 2, too large
Shadow-memory:
E3/B1 - Ox.-s.control deviation, bank 1, too large
E4/B1 - Ox.-s.control deviation, bank 2, too large
85/08 - Signal, CAN ASC 3
7F/02 - Activation, solenoid valve, suction-jet pump

Could it be a possible o2 sensor, fuel pump/pressure MAF...
I also just recently got the car a couple months ago and this is the first time it has done this.

Any help would be appreciated
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Old 08-30-2012, 11:37 PM   #2
94583
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Join Date: Aug 2012
Location: San Francisco Bay Area
Posts: 35
My Ride: E39
I would first check for vacuum leaks based on those faults. Most common source is the DISA flap seam and or the cyclone separator under intake manifold. If none found I would suspect the MAF. You'll need better test software to determine that.

Good luck!
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idle, mass air flow sensor, oxygen sensor, stalling on startup

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