Engine - N62 4.4l from an 04.

I had to replace the left bank Cam cover and because they don't mount the ccv on the cover anymore I needed to replace the 4 way vent tube with the two piece updated version.

Now after I've done that after driving about 20 minutes I've got the Check Engine Light has come up on the dash and it's not clearing.......

On a better note the smoke at extended idle seems to be gone/not as bad

Is there a software update required for the ECU because of the hardware change?

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2004 E53 4.4L N62