although the images between the 2 cars look different, they are both good waveforms.

have a look at the VAN network , you may find that this is where your problem is , same test just different pin connections at the DLC socket, look up a wiring diagram for what pins. i think its 3 and 11 but ?????? i have a pico break out box which makes it easy , it has nice flashing lights and its got numbers and every thing..

i had a ford c max in a few weeks ago, with weird stuff going on and it took about 15 to 20 mins for the problem to appear and the VAN network was going bad , so keep your scope connected for a while and give it time for the gremlins to come out to play.