2000 e39 540i and i keep getting a p0022 code

hi i have a 2000 e39 540i and i keep getting a p0022 code and i already changed my cps sensor that i got from bmw ive searched everywhere and cannot find a solution to this code pleeeeeeeeeeease help

and i also forgot to mention white smoke comes out exhaust with cold start and my car is knocking and i also replaced chain guides and tensioners

__________________
This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: BMW Camshaft Timing and Vanos Unit Installation

[Nick at Pelican Parts]

The code refers to camshaft timing being off. I would pull the valve covers and install camshaft alignment tools and see if the timing is correct.

The white smoke may be due to a faulty crankcase breather.

- Nick