This possibly falls into the flipside of owning a VX. Since people hardly ever see one, most assume it's some sort of exotic, and that as it's owner, you automatically have piles of cash on hand for them to liberate at their whims.

I parked near a Sears Auto shop at a mall one time, and came back an hour or so later with a tire that was almost flat. I'd never had problems with a leak before that, but you never know. I pulled into their garage and we aired up the tire and check for leaks with it still on the vehicle, all the while with them saying they could repair it and have me back on my way in no time. I never spotted any leak so I just told them I'd take my chances on making it home and keep watching it. It never went low again. Did they let the air out themselves (it was a couple of teenagers manning the shop that day) thinking they could make a quick $20 in the process? I guess I'll never know for sure. But it did make we wonder.

The history some VX's seem to have with wiring harnesses becoming shorted because of bad routing seems more likely than an ecu going bad, but other than that, I don't think I can add more than what's already been suggested.