My system (Verizon Connect) plugged into the OBD port and acted as a pass though. I still have the camera system/GPS tracking installed but the Grenadier did NOT like the OBD connection. Even though Verizon says it does not effect the vehicle and only "reads" data from the port it would trigger power steering error warnings frequently. Unplugged that and errors went away. Plugged back in errors came back.