White Smoke because o2 sensor missing?

Just out of curiosity, wouldn't it throw a CEL if the sensor was screwed up? I just did my DP install and mine is smoking like crazy. I didn't have a problem with the sensors (luckily) so I am ASSUMING they are in working order and the problem lies with the turbo seals. Like I said, wouldn't a jacked up sensor throw a code?
 
im aware that few have had problems with the turbo seals going bad but in most cases this whiteish gray smoke is normal when you remove cats, The metal sweats and makes steam mixed with exhaust gasses spewing out small clouds of white smoke once in awhile. if the problem comes and then goes away its mostly not the seals going bad, but if the problem continues every time you drive then its most likely the seals.
 
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