Petrol Diagnostics: BMW 523i 2000 Eng 25 6S 4 - Codes 227 & 228 O2 control deviation to large bank 1

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BMW 523i 2000 Eng 25 6S 4 - Codes 227 & 228 O2 control deviation to large bank 1 Archived Message
Posted by John Kennard on February 15, 2007, 4:39 pm
Hi Lads & Ladies, have got a beamer with codes 227 & 228 Ox control deviaton too large bank 1, 228 is bank 2. the front O2 sensor switches between .1 - .75mv the rear O2 sensor straight lines @ .65mv @ 3500 RPM. is this a Cat fault? The vehicle has just gone through a MOT emmissions test perfectly but the MIL light comes on after approx 4 miles down the road after clearing the codes. Has anyone come accross this before as I would appreciate your comments please.
John Kennard.

Message Thread:

BMW 523i 2000 Eng 25 6S 4 - Codes 227 & 228 O2 control deviation to large bank 1 - John Kennard February 15, 2007, 4:39 pm
replies - steve walker February 15, 2007, 9:21 pm
fixed - John Kennard February 16, 2007, 10:13 am
replies - steve walker February 16, 2007, 9:04 pm