This may be a stupid question but I will ask it anyway. I have found a 16 pin diagnostic port in the drivers footwell, but I keep seeing and hearing of a 20-pin round Diagnostic port in the engine compartment. Should I also have this port and if so where in the engine bay does it hide?? So far I have been unable to locate it.
The reason I ask is that when I connect the diagnostic laptop, it connects ok but then responds that the module(s) cannot connect, does anyone have any ideas.