If a motor is smoking and losing power with engine management lights coming on, the first thing I would check would be the E.G.R valve,it will be near the inlet manifold or linked to it,sorry haven`t done a Vectra so cant help you as to where it is,but try and remove it and clean and make sure it is nice and free.
wickham
April 2010
howtomendit.com for free repair help, information and advice.
