Not all Vectra-B are OBD-II compliant.
You might want to check that first before spending money.
i have a Vauxhall vectra B from 99' the faceliftet model and i have a carpc in my car im using centrafuse 2.0 and i have checked out the OBDII program and i want to make it work.
what module do i have to buy to connect the OBDII in the car i have seen the ELM327 Interface but can use that or is there a smarter way to do it?
im from denmark so please excuse me if my english is not perfect