E46Fanatics - View Single Post - Pre-cat Oxygen Sensor DIY (lots o pix)
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Old 04-27-2008, 11:47 AM   #42
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Join Date: Jul 2006
Location: Hong Kong
Posts: 5
My Ride: BMW 325i 2001 4drs
I replaced both pre-cat oxygen sensor yesterday, and the engine light on immediately and have the following codes

CA- oxygen sensor control limit, cyl 1-3
Cb- oxygen sensor " ", cyl 4-6
e4- oxygen sensor adaptation limit #4-6
e3- oxygen sensor " ", 1-3

Any one has similar experience? Should I replace the post cat oxygen sensor as well?
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