I doubt its the obd port. Honestly just sounds like normal wear and tear. Every time you plug in your openport 2.0 the pins wiggle ever so slightly. That combined with thermal expansion/contraction and the possibility of striking it with your leg during a datalog or whatnot can loosen the solder that terminates the pin to the circuit board. I have no doubt after time voltage errors can be an issue. Like dux10 says its probably a great time to contact tactrix and get a replacement.