I want to purchase a fault code reader for my 2004 Vectra-C diesel but I am confused about what type I need. I tried a friends RAC fault code reader (from Argos I believe) which is ODB2 compliant and it seemed to work, but was very basic, although it did show that I must have the ODB 16 pin interface under my cigarette ashtray.
I have spoken to a few people and they've recommended that I need one that supports VAUXCOM/OPCOM and someone else said tech2 ... but then there are ODB and ODB2 type units!!
Any thoughts on which one I need? I would like to read the fault codes but it would also be nice to pick up on other data from the car. I'm looking to spend about £50 max ideally for one off ebay.