It's been while but here is what. I came across a CHEAP($20) known good matching ECM and bought it thinking an extra lying around wouldn't be a bad idea anyway. For shits and giggles, I hooked it up and there was no change. Before that I borrowed an old mt2500 and it would die out as soon as the key was turned, but it was acting flaky as I was powering it up was well so I was going to just find another scan tool.