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Old 09-28-2012, 09:56 PM   #31
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Join Date: Aug 2011
Location: Reading, Pennsylvania
Posts: 814
My Ride: 03 325xi, 01 325xi
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SamDoe1, Codes are: CA - O2 Sensor Control Limit Cylinders #1-3 (bank 1 if you will), CB - O2 Sensor Control Limit Cylinders #4-6 (bank 2 if you will), E3 - O2 Sensor Adaptation Limit Cylinders #1-3 (again, bank 1 if you will) and E4 - O2 Sensor Adaptation Limit Cylinders #4-6 (again, bank 2 if you will). You may not be familiar with these codes from my code reader. Am thinking that since the fuel/air mixture was lean and the random misfires because of the bad pre-cat O2 Sensors making it lean, that the post-cat O2 sensors could have gone bad/out of limit because of too much heat from the lean condition, and even though the lean fuel/air mixture was corrected with the new pre-O2 Sensors, the post-cat O2 Sensors are now out of the adaptation range. The reason I asked about the DISA was because I hear it once in awhile and figure it needs to be checked and either repaired or replaced.
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